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.

Factory Wholesale Silver Nanowire (30nm 50nm 70nm 100nm)

Silver nanowires are silver gray, can be stored as a colloidal suspension in different solvents, such as water, ethanol, isopropanol, etc. Diameter ranges from 10 nanometers to hundreds of nanometers, and can be controlled.

Silver nanowires, due to its small size, large specific surface, has a good chemical properties, catalytic performance, antibacterial performance and excellent biocompatibility. Currently in optics, electronics, catalysis, information storage, medicine and energy silver nanowires have important applications. unlike silver particles, as in three-dimensional direction are in nanometer scale, the size effect, quantum effect and surface effect more apparent, and Silver particles can be widely used in conductive paste additives and catalyst. Silver nanowire, in addition to having traditional  electrical conductivity, ductility and tensile properties of silver particles,  have different electrical, optical features, can be added in a variety of products as additives for modifying material.

We provide our customers:reliable service, customize products according to customers’ special requirements.We can customized high quality silver nanowire in forms of powder, solution or dispersions.