Technical Support

What is the preparation method of Ammonium paratungstate

The molecular formula of APT crystallization is 5(NH4)2O·12WO3·nH2O(n=5, 7, 11), and its solubility in water is very small, which increases slightly with the rise of temperature. Ammonium secondary tungstate crystallization is the main intermediate product for the preparation of blue tungsten oxide, ammonium tungsten bronze and tungsten powder, and its morphological structure greatly affects the morphology and properties of tungsten products. The particle size and loose packing density of tungsten products are dependent on the raw material ammonium secondary [...]

The invention relates to a preparation method and a process of ammonium fluotitanate

Ammonium fluotitanate, also known as ammonium hexafluorotitanate, is commonly used in ceramics and glass as an anti-corrosive cleaner and in the manufacture of artificial gems; In addition, it can also be used to synthesize the titanium oxide precursor with special morphology. Ammonium fluoride titanate powder is stable at room temperature and insoluble in water. In the existing preparation methods of ammonium fluoride, the raw materials used are usually more complex, the cost is higher, and the preparation method is [...]

Vanadium carbide and its preparation method and process

Vanadium carbide, black crystal, density 5.25-5.4 black crystal, melting point 2750℃, slightly harder than quartz. Mainly used in the manufacture of vanadium steel, can also be used as carbide carbide additive. Can be used in structural steel, tool steel, pipe steel, rebar, ordinary engineering steel and cast iron. The research shows that adding vanadium carbide to steel can improve the comprehensive mechanical properties of steel, such as wear resistance, corrosion resistance, toughness, strength, ductility and hardness as well as [...]

The process control of the crystallization of ammonium dimolybdate and the process conditions for the formation of single crystal

Ammonium molybdate is a typical homopolybdate with many types, mainly including ammonium dimolybdate, ammonium tetramolybdate, ammonium heptamolybdate, ammonium ocmolybdate, ammonium dodecolybdate and ammonium tetramolybdate. Ammonium molybdate used in the industry is mostly the mixture of the above ammonium molybdate in different proportions, which is easy to be hygroscopic and agglomerated, and not easy to disperse. Ammonium molybdate is the main raw material for preparation of molybdenum-based products, especially molybdenum powder. Its phase purity and chemical and physical properties have [...]

Preparation of tungsten chloride

This procedure is exactly the same as the preparation of tungsten tetrachloride, but the product cannot contact with air due to its strong hygroscopicity, so it should be fully dried and preserved. Under this reaction condition, there is no protective atmosphere, so it is difficult to ensure that tungsten pentachloride is not decomposed. During refining, the product is put into a hard glass tube and placed in the air of vacuum or nitrogen and carbon dioxide. The glass tube [...]

Preparation and application of titanium nitride

The chemical properties of nitrogen element are very stable, but under some special conditions, it can form nitrides with many elements. Among these nitrides, the transition metal nitrides — Titanium nitride (TiN) has become the focus of research at home and abroad. Titanium nitride is a small wet structural material with attractive gold color, high melting point, high hardness, good chemical stability, and metal, and has high conductivity and superconductivity. It can be used in high temperature structural materials [...]

Preparation and application of molybdenum silicate

Molybdenum Disilicide, MoSi2 is a kind of silicon Molybdenum compound, also known as Molybdenum Disilicide, Molybdenum silicide has high melting point, low density, good thermal conductivity and good electrical conductivity and excellent high temperature oxidation resistance, high elastic modulus, low thermal expansion coefficient, high strength, good resistance to chemical corrosion and thermal shock resistance, are widely used in high temperature heating element component materials and high temperature oxidation resistance coating materials, is also the most development potential of high [...]

Main applications of tantalum silicide

Metal silicides are similar to metals in electrical conductivity, high temperature performance, oxidation resistance and compatibility with the production process of silicon integrated circuits. Transition metal silicides can be used for low-resistance gate and interwire, schottky gate and resistance contact. Tantalum silicide preparation method includes: the combustion synthesis (combustionsynthesis, CS) or self-propagating high-temperature synthesis, arc melting method, etc. Combustion synthesis or self-propagating high temperature synthesis is a method for the synthesis of intermetallic compounds by the exothermic reaction of [...]

Preparation of zirconium tungstate

1.. Impregnation method A certain amount of zrocl2.8h20 was dissolved in an appropriate amount of deionized water, and ammonia was added to form a hydrogel. The pH value was adjusted to 9.0. After being placed at room temperature for 12h, the precipitate was filtered and washed with deionized water to be chlorine-free (0.1 mol·L ~ AgN03 solution was used for detection). Then the filter cake was soaked in anhydrous ethanol and alcoholized for 12 h in a constant temperature drying [...]

The invention relates to a transition metal boride catalyst, a preparation method and its application technology

The invention relates to a transition metal boride catalyst, a preparation method and its application in electrocatalytic water cracking for hydrogen production, belonging to the technical field of inorganic functional materials. The patented technology of the invention relates to a preparation method of a transition metal boride catalyst, in which chloride of the transition metal is used as a metal source, MgB2 as a boron source, and Mg powder is used as an auxiliary for quasi-solid phase replacement reaction. [...]