Beryllium copper

Beryllium copper, also known as beryllium bronze, is the "king of elasticity" of copper alloys. After solution aging heat treatment, products with high strength and conductivity can be obtained.The machinability, weldability and polishing properties of beryllium bronze are similar to those of common high copper alloys. 

Beryllium bronze can be divided into two categories. According to the composition of the alloy, beryllium content is 0.2%-0.6% for high conductivity (electrical and thermal) beryllium bronze, and beryllium content is 1.6%-2.0% for high strength beryllium bronze. According to the manufacturing process, it can be divided into cast beryllium bronze and deformed beryllium bronze. C is the most widely used beryllium bronze alloy in the world. Deformed beryllium bronze includes C17000, C17200 (high strength beryllium bronze) and C17500 (high conductivity beryllium bronze). The corresponding cast beryllium bronzes are C82000, C82200 (high conductivity cast beryllium copper) and C82400, C82500, C82600, C82800 (high strength wear resistant cast beryllium copper). The largest beryllium-copper alloy manufacturer in the world is Brush Wellman Company of the United States, whose enterprise standards correspond to international standards and have certain authority. The history of beryllium bronze production in China is almost synchronized with that in the former Soviet Union and the United States, but only high strength beryllium bronze QBe1.9, QBe2.0 and QBe1.7 are listed in the national standards. Other high-conductivity beryllium bronze or cast beryllium bronze have been put into mass production according to the needs of the development of petroleum industry and national defense industry.

Beryllium bronze has good comprehensive properties. Its mechanical properties, such as strength, hardness, wear resistance and fatigue resistance, rank first among copper alloys. Its electrical conductivity, thermal conductivity, non-magnetic, spark resistance and other properties can not be compared with other copper materials. The strength and electrical conductivity of beryllium bronze are at the lowest value in the solution soft state. After work hardening, the strength is improved, but the electrical conductivity is still the lowest value. After aging and heat treatment, the strength and conductivity of the alloy increase obviously.

Monocrystalline Cell

 
Product name: Monocrystalline Cell
Research & Development Targets: Monocrystalline Cell Efficiency
Currently: 17.28%
In 5 Years: 21.23%
Planned Capacity:2010: 120MW;2011: 1.26GW

What is SnO2

SnO2, same as the Stannic oxide, chemical formula is SnO2. It is a white  or light gray square, hexagonal or orthorhombic powder. The temperature of 1630 ° C, the boiling point is 1800 ° C. Density is 6.95 g / mL at 25 ° C, it is also an excellent transparent conductive material. It is the first transparent conductive material to be put into commercial use. In order to improve its conductivity and stability, it is often used for doping, such as SnO2:Sb, SnO2:F, etc.

Electrode performance

1. Bulk density
6.38-6.58g/cm3
2. bending strength
Room temperature 1155kg/cm2
1000°C 641kg/cm2
1200°C 166kg/cm2
1400°C 95kg/cm2
3. Resistivity (Ω·cm)
Room temperature 93
400 ° C 6.1000
600 ° C 1.4000
800°C 0.0200
900°C 0.0150
1000°C 0.0098
1100°C 0.0084
4, anti-soda calcium glass erosion rate (mm / h)
1000°C 0.53 x 10-3
1100°C 0.63 x 10-3
5, thermal expansion rate (1200 ° C)
0.69%

SnO2 is an important semiconductor sensor material. The gas sensor prepared by it has high sensitivity and is widely used in the detection and prediction of various combustible gases, environmental pollution gases, industrial exhaust gases and harmful gases. The humidity sensor prepared by using SnO2 as a base material has applications in improving indoor environment, precision instrument equipment room, library, art museum, museum, etc. By doping a certain amount of COO in the SnO 2, Co 2 O 3 , Cr 2 O 3 , Nb 2 O 5 , Ta 2 O 5 , etc., varistors with different resistance values ​​can be fabricated in power systems, electronic circuits, household appliances, etc. There are a wide range of uses.

SnO2 has excellent permeability to visible light, excellent chemical stability in aqueous solution, and specific conductivity and infrared radiation reflection characteristics. Therefore, it is transparent in lithium batteries, solar cells, liquid crystal displays, optoelectronic devices, and transparent devices. Conductive electrodes, anti-infrared detection and protection and other fields are also widely used. SnO 2 nanomaterials have smaller size effects, quantum size effects, surface effects and macroscopic quantum tunneling effects, which are more common in traditional optical properties such as light, heat, electricity, sound, magnetic and other macroscopic properties. Significant changes, so nanomaterials can be used to improve the performance of sensor materials.

Nano- Tio2 titanium dioxide nanopowder nanoparticles for Cosmetic

Product name : Nano- Tio2 titanium dioxide nanopowder/nanoparticles for Cosmetic

CAS# :13463-67-7

Property :
This product is a dedicated cosmetic titanium dioxide; it can effectively prevent the damage of UV on human skin. This product is non-toxic and harmless, and has an excellent compatibility with other raw materials of cosmetic. Because of its chemical stability, high refractive index, opacity, hiding power, white, and non-toxic and harmless, Nano- Titanium dioxide is widely used in the field of cosmetics to do the function of the beauty whitening.

Specifications:

Item no:	AK-T02H	AK-T02SG	AK-T02SYv
Appearance	White loose powder	White loose powder	White loose powder
Content of TiO2 (%)	99	82-85	82-85
Crystal type	rutile	rutile	rutile
Particle size(nm)	30	30	30
BET(m2/g)	80±15	80±15	80±15
PH value	6--8	6--8	6--8
Surface Properties	hydrophilic	hydrophobic	hydrophobic
arsenic, ppm ≤	0.5	0.5	0.5
lead, ppm ≤	1.0	1.0	1.0
surface treatment	Coated with SiO2,Al2O3	Coated with SiO2,Al2O3, silicon oil	Coated with SiO2,Al2O3,stearic acid
Anti-UV rate %	≥ 99	≥ 99	≥ 99

Application Features :

1, the product has high brightness, good transparency, good ventilation, and natural light was white.
2, the product has good dispersion in regarding hydrophilic and hydrophobic products.
3, the product has good weathering resistance, suitable for sun whitening system.
4, the product has good compatibility with other raw materials of cosmetics.
5, the product can both reflect and scatter ultraviolet radiation, and can absorb ultraviolet light, thus it has a stronger UV-blocking ability
6.The product can be widely used on vanishing cream, sunscreen, skin-whitener and other cosmetics.

Dispersing liquid T33

Product name:Dispersing liquid T33

CAS No.:13463-67-7

Molecular Formula:TiO2

Appearance:white transparent liquid with bule light

Dispersant:water

PH:4-5

Surface property:hydrophilic

Stability:
Keeping stable system even after many times dilutions, no precipitation and still keeping nano level after long time storage.
Application:
Inside and outside of wall, surface of furniture and glass;
High grade coating, latex-paint, self-cleaning painting;
Self-cleaning pottery and tile;
Fluorescence light, paper-making industry
Light catalystic; UV-resistance;
Textile and cosmetic as well

Factory Price Sale TiB2 Nanopowder

Titanium Boride Nanopowder (TiB2) - COA - %
Ti	B	N	Si	Fe	Ni
65.45	29.55	0.09	0.14	0.08	0.01

Titanium Boride Nanopowder (TiB2) Products Performance:
It is a new ceramic material. And it has excellent physical and chemical performance. Such as high melting point ( 2980 centigrade), high hardness ( 34 GPa), and its density is 4.52 g/cm3. It could stand wear and tear, also resist acid-alkali. Its electric performance is good (P=14.4μΩ.cm), heat-conducting property is strong (25J/m.s.k). And it has excellent chemical stability and thermal shock resistant performance. Titanium diboride and its composite materials are innovative and high technology materials that were widely concerned and putative that has promotional value and application prospect.

Titanium Boride Nanopowder (TiB2) Applications:
Electrical conductivity composite materials--Electrical conduction boron nitride named evaporation boat made by titanium diboride and boron nitride is the primary member for vacuum aluminizing equipment; Ceramic cutting tools and their components--Titanium diboride ceramic is used for metal wortles, extrusion dies, sandblasting nozzles, potted components and cutting tools; Composite ceramic materials--It could be used as multi-element composite materials’ important constituent element. It can be made up cutting tools’ composite materials with TIC, TIN or SIC. And it is as a component to make armor protection materials. It is the best materials for thermo stability components and function devices; Aluminum electrolysis’ cathode materials--Because of the good wet ability of TIB2 and metal aluminum liquid. It makes the electrolytic aluminum’s power consumption become low, then the electrolytic bath's life will be long. It may also make up PIC exothermic materials and flexibility PIC materials, and it is the intensify reagent of the metal materials such as AL, FE and CU. .
Titanium Boride Micropowder (TiB2) Storage Conditions:
Damp reunion will affect its dispersion performance and using effects, therefore, this product should be sealed in vacuum and stored in cool and dry room and it should not be exposure to air. In addition, the product should be avoided under stress..

Supply boron nitride for sell with factory price

Boron nitride is a heat and chemically resistant refractory compound of boron and nitrogen with the chemical formula BN. It exists in various crystalline forms that are isoelectronic to a similarly structured carbon lattice. The hexagonal form corresponding to graphite is the most stable and soft among BN polymorphs, and is therefore used as a lubricant and an additive to cosmetic products. The cubic (sphalerite structure) variety analogous to diamond is called c-BN; it is softer than diamond, but its thermal and chemical stability is superior. The rare wurtzite BN modification is similar to lonsdaleite and may even be harder than the cubic form.

CAS Number: 10043-11-5 
CHEBI:50883 
ChemSpider: 59612 
ECHA InfoCard:    100.030.111
EC Number:    233-136-6
Gmelin Reference: 216
MeSH:    Elbor
PubChem CID: 66227
RTECS number:     ED7800000
UNII: 2U4T60A6YD 

Chemical formula:BN
Molar mass:    24.82 g·mol−1
Appearance:    Colorless crystals
Density:    2.1 (h-BN); 3.45 (c-BN) g/cm3
Melting point:    2,973 °C (5,383 °F; 3,246 K) sublimates (cBN)
Solubility in water: insoluble
Electron mobility:    200 cm2/(V·s) (cBN)
Refractive index (nD): 1.8 (h-BN); 2.1 (c-BN)

Because of excellent thermal and chemical stability, boron nitride ceramics are traditionally used as parts of high-temperature equipment. Boron nitride has potential use in nanotechnology. Nanotubes of BN can be produced that have a structure similar to that of carbon nanotubes, i.e. graphene (or BN) sheets rolled on themselves, but the properties are very different. 

We are supply the nano boron nitride for sell, Any more information please contact us by Email: sales@metal-powder-dust.com 

Pure Ruthenium ingot

Product Description：
Ruthenium , molecular formula: Ru, density 10-12g/cc, bright silver appearance, is pure Ruthenium products in compact and metallic state.It often formed into metal cylinder and also may be a square block.

Application:Ruthenium pellet is often used as element additives for the manufacture of Ni-base superalloy in aviation and industrial gas turbine. Research has shown that, in the fourth generation of nickel base single crystal superalloys, the introduction of the new alloy elements Ru, which can improve the nickel-base superalloy liquidus temperature and increase the alloy's high temperature creep properties and structural stability, resulting in the special "Ru effect" to improve overall performance and efficiency of the engine.

Size:Diameter 15~25mm, Height 10~25mm.Special size is available upon customers' requirements. 

Package:Sealed and filled with inert gas in plastic bags or plastic bottles inside steel drums.

Nickel-copper alloys

Nickel-copper alloys are mostly used to make components, such as traveling wave tubes and magnetrons, which require high corrosion resistance, high temperature fatigue resistance and so on. Nickel-copper alloy is composed of 60% nickel, 33% copper and 6.5% iron. Nickel-copper alloy has good room temperature mechanical properties and high temperature strength, high corrosion resistance, good wear resistance, easy processing, non-magnetic, is a good structural material for manufacturing traveling wave tubes and other electronic tubes. It can also be used as structural material of aeroengine.

Adding copper to nickel will have a series of effects on various properties of nickel, especially corrosion resistance, mechanical properties and physical properties. Generally, the addition of copper improves the corrosion resistance of nickel in reducing medium, but decreases the corrosion resistance of nickel in oxidizing medium and the oxidation resistance in air. The addition of copper increases the strength, hardness and plasticity of nickel, and decreases the plasticity slightly. The addition of copper increases the thermal conductivity of nickel.

Cobalt carbonate

Cobalt carbonate is a red monoclinic crystalline or powder. Toxic, irritating eyes, respiratory system and skin.It is mainly used to produce cobalt chloride, cobalt sulfate, cobalt oxide, cobalt metal and cobalt naphthenate.As a raw material for manufacturing cobalt oxide, it is used for manufacturing cathode materials for lithium batteries.It is also used for making discolored pigments, glass pigments, ceramics, feed trace element additives and trace element fertilizers.

The ceramic industry is used as a colouring agent in the manufacture of cobalt salts and in the colouring of porcelain. Used as beneficiation agent in mining industry. Organic industry is used to manufacture catalysts, camouflage coatings and chemical temperature indicators. It is used as trace element fertilizer in agriculture. Used as analytical reagent in analytical chemistry.

At present, the existing calcining equipment includes: kiln tail, pouring body, supporting frame, kiln cylinder body and kiln head; the pouring body is arranged at both ends of the kiln cylinder body, and the kiln tail and kiln head are respectively fixed on the pouring body at both ends of the kiln cylinder body; the supporting frame is respectively provided on the kiln tail and kiln head; one end of the kiln cylinder body near the kiln tail is provided with a baffle, in addition. One end is provided with an anti-skid plate.

However, when calcining cobalt carbonate with existing calcining equipment, because cobalt carbonate is granular and powdery, it is easy to send and accumulate in the feed section of rotary kiln, which makes cobalt carbonate not completely calcined, or the calcining effect is poor, so that the calcined product cobalt oxide is not ideal.

Silicon (Si) - the second richest element in the earth's crust

Today's video focuses on a very common non-metallic element - silicon. It is a carbon group element in the third period of the periodic table.

In 1811, French chemists first obtained impure amorphous silicon by heating potassium and silicon tetrafluoride, which can be obtained in a variety of ways. In the crust, it is the second most abundant element, which makes up 26.4 percent of the total mass of the crust, is second only to oxygen.

Silicon, usually in the form of complex silicates or silica, is found in rocks, gravel and dust. Pure silicon has amorphous silicon and crystalline silicon allotropes. Gray, shiny crystalline silicon looks more like a metal than black amorphous silicon. Silicon is insoluble in water and ordinary inorganic acids, such as nitric, hydrochloric, and sulfuric; It's soluble in hydrofluoric acid and alkali solutions.

The simplest way to make silicon is to heat a mixture of silica sand and magnesium powder. Heating up a small portion of the tube containing the mixture, when the temperature reaches, you will see that the reaction will immediately begin, emitting high temperatures, white smoke and dazzling white light; In this phenomenon, two reactions occur simultaneously, silica and magnesium react to form magnesium silicide and amorphous silicon. In this reaction, magnesium reacts not only with sand, but also with glass tubes, which also contain silica. That's why the tubes are destroyed, not just because of the high temperatures. If you break the test tube, you can see the product; Dark brown dust is amorphous silicon. And when you pour this stuff into dilute hydrochloric acid, you will see something very interesting which is the magnesium silicide reacted from the previous reaction with hydrochloric acid. And it immediately reacts with oxygen, that's why we saw the spark. Silane and methane are formulated in a similar way, with silicon atoms instead of carbon atoms. Unlike methane, methane needs to ignite before it can react with oxygen to start burning while Silane can start burning with oxygen on its own.

Another interesting experiment is to make silica gel. When dilute hydrochloric acid is added to a solution of sodium silicate, commonly known as sodium silicate, a jelly-like gel is formed after a period of time. However, if you add concentrated hydrochloric acid, you won’t get a gel, and the resulting solution is in a sol state and can still flow. But when you heat the solution, it ends up as a silicone gel.

It's still sodium silicate, and if you add a little bit of ferric chloride, you can see the product grow like a living seaweed. Everyone can try it at home and see what your algae look like. You can also substitute calcium, magnesium, copper, nickel, cobalt, barium, zinc, chromium and manganese salts for ferric chloride.

Nowadays, silicon can be found everywhere in people's life. The main component of glass is silicate compound salt, and silicon is also found in cement. High purity monocrystalline silicon is an important semiconductor material, widely used in diodes, transistors, thyristors and various integrated circuits. The chips and cpus inside computers are made of silicon. High transparency glass fiber can be produced from pure silica, which is widely used in optical fiber communication.

Silicon is one of the essential trace elements in human body, which is necessary in the formation of connective tissue and cartilage. Silicon is also a component of collagen.

Nano Silver Powder

Product name:  Nano Silver Powder 
CAS: 7440-22-4
Molecular Formula: Ag
Molecular weight: 107.87 

Description: 
Nano Silver Powder  is used in the manufacture of conductive plastics, conductive coatings, conductive adhesives,etc.

Most of the nano silver has particle size around 25 nm. According to the tests on Animals, there is no exhibition of being poisoned even if the dosage of silver nanoparticles is thousands of times used more than the standard dose.

Meanwhile, it helps to repair the damaged epithelial cells. What worth to be mentioned is that the antibacterial effects of Ag nanoparticles become more enhanced when in water, which is more effective to the treatment of diseases.

The experts believe that this nano silver anti-bacterial nanopowder can be widely used in the field of environmental protection, textiles and clothing, fresh fruit, food and health.

Nb2O5 Powder

High purity Niobium pentoxide (Nb2O5) is a white powder. It turns yellow when heated and turns white when it cools. The temperature of 1460 ° C. If it is doped with impurities (such as magnesium oxide, lead oxide, etc.), it will change color after sintering at high temperature.

Niobium pentoxide is used as a single crystal of nickel ruthenate, special optical glass, high frequency and low frequency capacitors and piezoelectric ceramic components. It is also used in the production of various niobium alloys for niobium and special steels. It is a raw material for the preparation of hydrazine and its compounds. Also used as a catalyst, refractory material.

The high-purity products are packed in double-layer polyethylene plastic bottles, each with a net weight of 5kg and tightly sealed. The back jacket polyethylene plastic bag is placed in a hard box and filled with paper dust to prevent swaying. The net weight of each box is 20kg. The industrial products are double-layer polyethylene plastic bags and outer jackets with a net weight of 40kg per drum.

Store in a ventilated, dry place. Do not stack in the open air. The package should be sealed. Protect from rain and packaging when transporting. In case of fire, use water, sand and fire extinguishers to save.

Toxicity and protection: Occupational poisoning has not been documented. Workers who use iridium complexes have a relatively high incidence of upper respiratory tract, which may be related to the effects of separated hydrogen fluoride and fluorocyanate. The maximum allowable concentration of cerium and its oxide is 10 mg/m3; the fluorine-containing compound is usually calculated as fluorine, i.e., 1 mg/m 3 . To work in an environment with a high dust content, wear a respirator and pay attention to ventilation and dust removal.

Tin (Sn)

Today we're going to talk about the metal Tin (Sn). Tin is in the fifth period of the periodic table, the fourth group. The metal was known as early as the 4th century BC. But it was difficult to refine, so the price was higher.

During the Bronze Age, tin was used as a strategic metal because tin-containing bronze was much stronger than pure copper. Tin is derived from minerals such as tin and sulfur.

Tin is a lustrous soft metal, covered by oxides of tin, slightly yellowish, less dense than lead, with a melting point of 231.89℃. Its low melting point makes it easy to melt into various shapes, and it is not as toxic as lead. If you bend a very pure tin ingot, you can hear the sound of the crystal inside the metal deforming. The same properties can be found in indium and zinc.

Compared to other metals, tin has a uniqueness called polymorphism. This kind of tin is called white tin, and if white tin is put in a cold environment of less than -15 ℃, then white tin will start to turn into a gray form, which is gray tin. The transformation process can be observed from video. Gray tin has a completely different crystal structure from white tin, similar to diamond. Any product made of white tin will be brittle if this transformation takes place. This effect is also known as "tin plague".

From a chemical point of view, tin is a low reactive metal that reacts slowly with dilute acids. In aqua regia, tin dissolves quickly and forms tin tetrachloride. When heated to more than 150℃, tin begins to oxidize gradually in the air, and when heated to 1000℃, tin burns in the air to form tin dioxide.

Tin dichloride is the most common of the tin compounds. You can do a couple of interesting experiments with it. Dissolving tin dichloride in 10% sulfuric acid to prevent its hydrolysis then pouring the solution into the petri dish, attaching the electrode to the edge of the petri dish, you will see tin chloride is oxidized to tin dioxide at the anode. Tin crystals look beautiful in macro photography. If the polarity is reversed, the new tin crystal dissolves and the new crystal precipitates at the cathode with a negative electrode. This reduction process is used in the production of tin cans.

Adding a sheet of zinc to a solution of tin dichloride and it will be covered with beautiful tin crystals. In this reaction, the zinc is oxidized to zinc chloride, and the tin is reduced to its metallic form, which makes a beautiful tin hedgehog.

At present, tin is mainly used as safe, non-toxic, corrosion resistant coating of pure alloy or other metal alloy. In everyday life, we can find tin in solder, which is mixed with other metals, mainly lead. Tin's most important alloy is copper, which is bronze. At the same time, tin is also an important part of titanium alloy. Tin disulfide commonly known as "gold powder", is used in paint to imitate gold plating.

In recent years, there has been a major problem with the introduction of lead-free solders into electronics, which produce long, thin tin crystals, also known as tin whiskers. These tin whiskers can grow very long, causing short circuits and equipment failures. The phenomenon, which has led to the breakdown of many electronic systems and even the paralysis of some orbiting satellites, remains unclear. But whiskers can be prevented by adding antimony or other low-melting metals to solder.

Multicrystalline Wafer 156mm x 156mm

 
Product name: Multicrystalline Wafer 156mm x 156mm
Research & Development Targets: Multicrystalline Wafer Thickness
Currently: 180 μm
In 5 Years: 130-160μm
Planned Capacity:2010: 3.0GW; 2011: 3.0GW
Growth Method: Directional solidification
Conductivity Type: P type
Dopant: Boron
Resistivity: 1~3Ω.cm
Oxygen Content: 1×10 18 atom/cm 3
Carbon Content: 4×10 17 atom/cm 3
Structural Characteristics:
Side: 156.0mm ± 0.5mm
Corner diagonal: 1.5mm ± 0.5mm
Corner Angle: 45°±10°
Thickness: 180±20μm; 200±20μm
Surface: No stain or splash on surface
Mechanical Characteristics:
TTV: ≤40μm
Bow: ≤70μm
Surface: No defect
Saw Mark: ≤15μm

Polycrystalline silicon wafer is a form of elemental silicon. When molten elemental silicon solidifies under supercooled conditions, the silicon atoms are arranged in a diamond lattice form into a plurality of crystal nuclei. If the crystal nuclei grow into crystal grains with different crystal orientations, the crystal grains are combined and crystallized into polycrystalline silicon. .

Utilization value: From the current development process of international solar cells, it can be seen that the development trend is monocrystalline silicon, polycrystalline silicon, ribbon silicon, thin film materials (including microcrystalline silicon-based films, compound-based films and dye films).

Polycrystalline silicon wafers are classified into electronic grades and solar grades. Let's talk about solar energy. It is used as a raw material for the solar energy industry chain. It is used for ingot casting or pulling single crystal silicon rods. It is cut into silicon wafers and produced into solar panels. It is solar panels on satellites and space stations. For the construction of solar power plants, there are few solar power stations in China. Although he is environmentally friendly, he is very costly and expensive. He often needs government subsidies. Europe is the most used solar energy in the world, and it is also the main sales of solar panels in China. direction. Electronic grade polysilicon is used to produce semiconductor materials, mainly used in electronic equipment, and is used on chips.

Metal silicon

Product name:  Metal silicon
Symbol: Si
Atomic Number: 14
Atomic weight: 28.0855 g/mol

Metal silicon

Description: 
Silicon is the most common metalloid. Metal Silicon is a grey and lustrous semi-conductive metal that is used to manufacture steel and aluminum alloy, solar cells, and microchips.

High-purity silicon metal is used in the chemical industry for producing silicon compounds, silicon wafers, solar cells and electronic semiconductors.

Most metallurgical silicon metal is used as an alloying agent in the aluminium industry due to its ability to increase the strength of aluminium.

Metallurgical coke powder

Metallurgical coke powder is the coke from high temperature coking used in blast furnace smelting, casting and gasification. The recovered and purified coke oven gas produced in the coking process is not only the fuel with high calorific value, but also an important industrial raw material for organic synthesis. Metallurgical coke is a general term for blast furnace coke, foundry coke, ferroalloy coke and nonferrous metal metallurgical coke. Because more than 90% of the metallurgical coke is used in the blast furnace smelting iron, so often referred to as blast furnace coke metallurgical coke.

In the industry of carbon products, the metallurgical coke which is used as resistance material is transformed into graphitized metallurgical coke after the graphitized high temperature heat treatment.Metallurgical coke powder a small amount of pyrolytic carbon is deposited on the surface or pore wall surface of metallurgical coke, which is generated by high temperature pyrolysis of hydrocarbons generated by coal pyrolysis in the process of coking. Pyrolytic carbon is anisotropic and its crystallization degree is relatively high. It can protect the coke to a certain extent when the metallurgical coke is oxidized or corroded.

In order to achieve better technical and economic indexes, metallurgical coke must have proper chemical and physical properties, including thermal properties in the process of smelting. In addition to the large amount of coke used in iron and non-ferrous metal smelting (metallurgical coke), but also used in casting, chemical industry, calcium carbide and ferroalloy, the quality requirements are different. Such as casting coke, the general requirements of particle size, low porosity, fixed carbon and low sulfur content; Coke for chemical gasification, the strength requirements are not strict, but the requirements of good reactivity, ash melting point is high; The fixed carbon content should be increased as far as possible for calcium carbide coke.

%10 platinum on activated carbon

Platinum carbon catalyst belongs to noble metal catalyst with black powder appearance and molecular weight of 195.08. Platinum carbon catalyst is a kind of carrier catalyst which supports platinum onto activated carbon. Can be used in pharmaceutical, electronic and other fields, the application is more extensive. The platinum content ranged from 0.5% to 20%.

At present, carbon platinum catalysts with high load capacity are one of the key materials for proton exchange membrane fuel cells. The size distribution of pt nanoparticles and the content of impurities have great influence on the electrocatalytic performance and operational stability of the catalysts. When the particle size of Pt in the catalyst is 2-5nm, the particle size distribution is narrow, the particle size distribution is uniform on the carbon, and the content of harmful impurities (such as Cl) in the catalyst is small, the catalyst has better activity and stability. Particle size distribution and impurity content control of Pt metal particles in carbon-based platinum catalysts are the difficulties and emphases in the preparation of catalysts.

Platinum carbon catalysts are mainly used in the following aspects:

1.Organic synthesis: dehydrogenation, aromatic ring hydrogenation, hydrogen peroxide decomposition, gas purification;

2. Platinum carbon is used in the combination reaction of hydrogen and oxygen to purify hydrogen from oxygen, argon, nitrogen, carbon dioxide, air and helium;

3. Platinum carbon is used in the combination reaction of oxygen and carbon tetrachloride to purify oxygen from nitrogen;

4. Platinum carbon is used for the combination reaction of hydrocarbons and oxygen, and the hydrocarbon compounds are purified from oxygen, nitrogen, carbon dioxide, air, helium and argon;

5. Platinum carbon is used for the combination reaction of carbon monoxide and oxygen to purify carbon monoxide from carbon dioxide, nitrogen and air.

Platinum carbon has high selectivity, activity and long life. The reaction can be carried out at low temperature, low pressure or even normal temperature and pressure. It can be recycled, purified and reprocessed.

what is titanium

Titanium is best known for its corrosion resistance, which is almost as good as platinum. Titanium is not corroded by dilute sulfuric acid, dilute hydrochloric acid, chlorine gas, chlorine solution and most organic acids, but it can still be dissolved by concentrated acid. Although the potential-ph diagram below indicates that titanium is a very active metal in thermodynamics, it reacts very slowly with water and air.

Titanium powder, titanium hydride powder: purity: 95-99.4% and other specifications: titanium powder: product is silver gray irregular powder, has a large suction capacity, high temperature or spark conditions flammable.

When exposed to hot air, titanium creates a protective film of blunt oxides that prevents oxidation from continuing. In the initial formation, the protective layer is only one to two nanometers thick, but will slowly continue to thicken; Up to 25 nanometers thick in four years. But when titanium is exposed to hot air, it easily reacts with oxygen.

This reaction takes place when the air temperature reaches 1200 ℃, whereas in pure oxygen it takes as little as 610℃ to produce titanium dioxide. So you can't melt it in the air, because it burns before it gets to the melting point, so you can only melt it in an inert gas or in a vacuum. At 550 degrees Celsius, titanium binds to chlorine gas. Titanium also binds to other halogens and absorbs hydrogen.

Titanium can be found in meteorites and has been detected in the sun and m-type stars; M-type stars are the coldest stars, with a surface temperature of 3,200 degrees Celsius. The Apollo 17 mission brought back rocks from the moon that contained 12.1 percent titanium dioxide. Titanium can also be found in coal ash, plants and even the human body.

Titanium is an alloy element of steel (ferrotitanium), titanium will reduce the grain size of steel, and as a deoxidizer titanium will reduce the oxygen content of steel; Adding titanium to stainless steel reduces the carbon content. Titanium is often alloyed with other metals such as aluminum (modified grain size), vanadium, copper (hardened), magnesium, and molybdenum. Titanium mechanical products (sheet, plate, tube, wire, forgings, castings) have applications in industry, aerospace, leisure and emerging markets. Titanium powder is used in pyrotechnics to provide bright burning particles.