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Upconversion nanoparticles convert infrared light into ultraviolet and visible light

Researchers from the department of bioengineering at the national university of Singapore’s school of engineering have developed a new technique that can convert infrared light into ultraviolet and visible light using nanoparticles, paving the way for non-invasive treatments for deep tumors, physicists group reported. The technique, which claims to inhibit tumor growth and control gene expression, is the world’s first non-invasive photodynamic therapy to treat deep tumors with nanoparticles. The paper appears in a recent issue of the journal [...]

Secondary tin and recycled tin will dominate the industry in the future

Tin is one of ten commonly used non-ferrous metals. At present, tin is mainly used in electronic solder, tinplate, tin chemical industry, tin alloy, float glass, tin handicraft and other industries. Tin applications in the electronics industry is mainly tin solder, used in electronic welding, the field currently accounts for 70 percent of China’s tin downstream application, in addition to tinplate and tin chemical products accounted for 8 percent and 12 percent of the downstream application. Tin is closely related [...]

Common synthetic method for preparing aluminum nitride powder

Currently, there are many methods to prepare aluminum nitride powder, such as direct nitriding of aluminum powder, carbonothermic reduction of alumina, sol, self-tensioning, plasma synthesis, decomposition of polymer containing ALN bond, chemical vapor deposition, water-induced solid phase reaction, sol-gel method, etc. The following small series for you to introduce the aluminum nitride powder commonly used synthesis. 1) direct nitriding of aluminum powder ALN+N2→2ALN put aluminum powder into the reaction furnace filled with nitrogen and ammonia reaction to heat to 600℃ to [...]

What is the difference between hexagonal boron nitride and cubic boron nitride

There are four types of boron nitride, hexagonal boron nitride, rhomboid boron nitride, cubic boron nitride and wurtzite boron nitride. It’s easy to confuse hexagonal boron nitride with cubic boron nitride. What’s the difference between hexagonal boron nitride and cubic boron nitride? The difference between hexagonal boron nitride and cubic boron nitride lies in their different physical structures and USES. Boron nitride is a kind of white crystal, stable chemical property, high temperature resistance, melting point up to 3000 degrees Celsius, [...]

Special ceramic materials

Properties of special ceramic materials are determined by two factors. First, the structure of the material, the main bonding properties, the crystal structure. They determine the properties of ceramic materials, such as high temperature resistance, semiconductor and insulation. Secondly, microstructure, including distribution, grain size, shape, pore size distribution, impurities, defects, etc. Ordinary ceramics with clay, feldspar, quartz as raw materials, made by preparation, sintering. This kind of ceramic is hard, no oxidation rust, corrosion resistance, non-conductive, high temperature resistance, [...]

Industrial use of vanadium

Add a few percent of vanadium in steel, can make the elasticity of steel, strength increase, anti – wear and anti – crack very good, both high temperature resistance and anti – cold, no wonder in the automobile, aviation, railway, electronic technology, defense industry and other sectors, everywhere can be seen to trace vanadium. In addition, vanadium oxide has become one of the best catalysts in the chemical industry, including “chemical bread” Mainly used in the manufacture of high-speed cutting [...]

Research on flame retardant nano magnesium hydroxide process

China’s plastic flame retardant material is mainly based on decabromodiphenyl ether, but decabromodiphenyl ether in combustion will produce toxic carcinogenic polybrominated dibenzofuran and other substances, and make it some countries to resist the use of. Therefore, flame-retardant materials also develop towards the direction of high efficiency, low toxicity and low smoke. It is necessary to develop nontoxic flame retardant with excellent performance. Inorganic materials used as flame retardants include Mg(OH)2, AL(OH)3, Sb2O3, etc. These inorganic flame retardants not only [...]

The difference between industrial grade lithium carbonate and battery grade lithium carbonate

Compared with industrial grade, battery grade lithium carbonate has high purity, few impurities and good performance. Lithium carbonate is an inorganic compound. It is colorless monoclinic crystal or white powder. Its chemical formula is Li2CO3. Soluble in dilute acid, slightly soluble in water, greater solubility in cold water than in hot water. Insoluble in alcohol and acetone. Density 2.11g/cm3, melting point 723℃. Can be used to make ceramic, medicine, catalyst, commonly used lithium ion battery materials. Compounds, lithium metals and isotopes [...]

Properties of nano-aluminum nitride filled ptfe composites

Nano aluminum nitride powder has high specific surface area, high hardness, high thermal conductivity, high insulation and other characteristics, belongs to diamond-like nitride, can be stable to 2200℃, high strength at room temperature, good compatibility with the matrix interface, can improve the thermal conductivity and dielectric properties, mechanical properties and wear resistance of the composite. PTFE, commonly known as “plastic king”, has a linear molecular chain structure and is a non-polar polymer, with good chemical corrosion resistance, high and low [...]

Application of nanometer silicon carbide powder in catalyst and capacitor

Due to its large specific surface area, suitable band gap (2.39-3.33ev) and excellent thermodynamic and chemical stability, nanometer silicon carbide powder has a wide range of applications in photocatalysis and electrocatalysis. On the other hand, due to its stable chemical properties, nano-sic nanomaterials can also be used as catalyst carriers and supported metal nanoparticles for multiphase catalysis and fuel cell catalysis. It is reported that the nanocrystalline nanocrystalline nanocrystalline betac-sic wires are coated on the surface of amorphous nanocrystalline [...]