Articles

Classification of molybdenum oxide

Molybdenum is a refractory metal. It is related to the progress of many high-tech fields, but also to the sustainable development of many economic sectors, such as the steel industry, petrochemical industry and so on. In recent years, the application of molybdenum is increasing rapidly, and it is becoming more and more prominent as an important non-renewable resource. Molybdenum oxide is the most important compound of molybdenum. If a total of 160,000 tons of molybdenum were consumed in the [...]

Nano magnesium carbonate market prospect

As we know, nano magnesium carbonate is a chemical raw material with a wide range of applications. The market has a large space for development, with varying degrees of growth every year. Therefore, high-grade and refined magnesium carbonate products need to be developed in order to be used in more high-grade industries. Nano magnesium carbonate is not only used in medical and food fields, but also used in rubber, glass, ceramics and other industries. As the demand continues to rise, [...]

A modification method of nano-samarium oxide MC nylon

MC nylon is a new type of engineering plastic, which is made of caprolactam as the main raw material by anion polymerization under atmospheric pressure. MC nylon is gradually replacing copper, aluminum, steel and other metal materials and is widely used in textile, rubber, petrochemical, steel rolling, mining machinery, automobile, elevator, crane and other industries. But compared with metal, MC nylon has some disadvantages such as lower strength, modulus and thermal deformation temperature, larger water absorption rate and poor [...]

Main uses of hafnium carbide powder

Hafnium carbide (HfC) is a gray black powder, belonging to the face-centered cubic structure, with a very high melting point (3890℃), is known in the single compound with the highest melting point, is a good material for high melting point metal crucible lining. Hafnium carbide has high elastic coefficient, good electrical and thermal conductivity, very small thermal expansion coefficient and good impact resistance, very suitable for rocket nozzle material field, is also an important metal ceramic material. Hafnium carbide is a [...]

Preparation and application of magnesium nitride

Chemical formula of magnesium nitride Mg3N2, greenish yellow powder or lump, relative density of 2.712, decomposition at 800℃, sublimation at 700℃ in vacuum, magnesium nitride as ionic compound, rapid hydrolysis in water. Soluble in acid, insoluble in ethanol: magnesium nitride is widely used. Magnesium nitride is an indispensable sintering agent in the solid state reaction of boron nitride and silicon nitride, which are new ceramic materials with high hardness, high thermal conductivity, wear resistance, corrosion resistance and high temperature [...]

Preparation of aluminum nitride powders

1.1 Direct nitriding Aluminum nitride does not exist in nature. It is now prepared by direct nitriding of metallic aluminum powder or direct nitriding method after carbon thermal reduction of Al2O3. Its chemical reaction formula is: 2 al (s) + N2 (g) – > 2 aln (s) Direct nitriding has several advantages: 1) low cost; 2) Rich raw materials; 3) The reaction system is simple and there is no side reaction; 4) The reaction temperature is lower than that of carbothermic reduction; [...]

Synthesis of nano – neodymium oxide by homogeneous precipitation method

Nano Nd_2O_3 powder material was prepared by homogeneous precipitation method. The preparation process, the kinetics of precipitation reaction and thermal decomposition reaction of precursor precipitate were studied. Other lanthanide elements (except promethium) and yttrium oxide were prepared. The main research contents and results are as follows: Nano Nd_2O_3 was prepared by uniform precipitation method by dissolving crude Nd_2O_3 in concentrated nitric acid (Nd(NO_3)_3) and urea as precipitator. The effects of the concentration of Nd~(3+), urea concentration, reaction temperature and [...]

A preparation method and process of nano-holmium oxide

The main uses of holmium oxide are :(1) yttrium aluminum garnet doped with holmium (Ho∶YAG) can emit 2μm laser, human tissues to 2μm laser absorption rate is high, almost 3 orders of magnitude higher than Hd∶YAG. Therefore, the Ho∶YAG laser can not only improve the efficiency and precision of surgery, but also reduce the thermal damage area to a smaller extent. (2) A small amount of holmium can also be added to the magnetostrictive alloy Terfenol-D to reduce the [...]

Discussion on the properties of aluminum nitride

Aluminum nitride (AlN) is a kind of advanced ceramic material with excellent comprehensive performance. It is a kind of new packaging material which is favored by domestic and foreign experts. It is also recognized as the most promising high thermal conductivity ceramic material at present. Research on it began more than a century ago, but it was only used as a nitrogen-fixing fertilizer. As a covalent compound, aluminum nitride is difficult to be sintered due to its high melting [...]

Manufacturing method of nano cobalt oxide

For the gradual maturity and stability of nanotechnology required nano-level items are also more and more, but for nano-level cobalt oxide should be how to make it, with the xiaobian take a look! (1) Preparation of cobalt salt solution: use nitric acid or sulfuric acid to dissolve cobalt metal to generate cobalt nitrate or cobalt sulfate aqueous solution after measuring the cobalt content in the solution of 50~ 300 g/l and free acid control in 20 g/l or less can [...]