Tungstate tungstate is an anionic salt containing tungstate (WO42-) or polytungstate (W7O246-). Ammonium ions, alkali metals, alkaline earth metals and many heavy metal cations can form tungstates.
Ammonium tetrathiotungstate
CAS number of ammonium tetrathiotungstate (NH4) 2WS4: 13862-78-7; Molecular formula: H8N2S4W; Molecular weight: 348.17700; Its preparation method is prepared by reacting tungstate and ammonium sulfide (NH4) 2s solution. items etc.
Barium tungstate
Barium tungstate is white powder, slightly soluble in water, soluble in boiling oxalic acid aqueous solution, decomposed in acid, stable in air. It can be used in the electronic industry and optical glass, ceramics, pigments, corrosion inhibitors, intensifiers and fluorescent screens in X-ray photography.
Bismuth Tungstate
Bismuth tungstate is the simplest oxide in bismuth-layered perovskite. At present, the main morphology of Bi2WO6 is tire shape, flower shape, spiral shape, sheet shape, nest shape, graded microsphere shape, and nanocage shape. Bismuth tungstate has good photocatalytic properties and catalytic activity, and can be used to degrade organic pollutants.
Cadmium borotungstate
Cadmium borotungstate is a yellow triclinic crystal, easily soluble in water, the solution is yellow or light brown, and is mainly used to separate ores.
Cadmium Tungstate
Cadmium tungstate is a white or yellow fluorescent crystal with wolframite structure, in ammonium hydroxide and alkali cyanide solution, almost insoluble in water or dilute acid. Uses: Fluorescent coatings, X-ray fluorescent screens, scintillation counters, phosphors, organic reaction catalysts.
Calcium tungstate
Calcium tungstate is a white powder. Tetragonal crystal structure. The relative density is 6.062. Slightly soluble in water and ammonium chloride solution. Decomposes in hot hydrochloric acid. It is mainly used in the production of tungsten products such as ammonium paratungstate, tungsten trioxide, ferro-tungsten, alloy steel, hard alloy, tungsten material, tungsten wire and tungsten alloy.
Cerium tungstate
Cerium tungstate is stable at normal temperature and pressure, yellow tetragonal crystal system, relative density 6.77, melting point 1089°C, ferromagnetic below 30K.
Cesium tungstate
Cesium tungstate is a colorless crystal with strong hygroscopicity. A phase transition occurs at 536 ° C, from orthorhombic crystals to hexagonal crystals. Dissolved in water.
Copper tungstate
Copper tungstate properties: light gray, octahedral configuration. Red hot when melting point. Copper tungstate is an n-type semiconductor material, which is widely used as laser matrix material, scintillation detector, optical fiber and electrode material for photo-splitting water.
Lead Tungstate
Lead tungstate can be used as a filler for anti-radiation materials. The preparation method can be prepared by reacting tungsten powder and lead oxide (II) at high temperature, or by heating and reacting tungsten powder and PbO2.
Lithium tungstate
The shape of lithium tungstate is colorless triangular crystal with BeSiO3 crystal lattice. Synthesis method: Li2WO4 is obtained by dissolving WO3 in Li(OH) or Li2CO3 solution.
Magnesium tungstate
Magnesium tungstate, white powdery tetragonal crystal, monoclinic crystal structure, magnesium tungstate is insoluble in water and alcohol, but soluble in acids, can be used to make X-ray fluorescent screens, luminescent paints, fluorescent powder for color fluorescent lamps.
Manganese Tungstate
The properties of manganese tungstate are yellow odorless powder, which cannot be dissolved, and should be stored away from light, open flame and high temperature.
Nickel tungstate
Nickel tungstate is stable at normal temperature and pressure. The synthesis method is to react nickel powder with WO3 at 800°C and in vacuum.
Phosphotungstic acid
Phosphotungstic acid is colorless, off-white powdery solid or light yellow fine crystals. It is acidic and has oxidation-reduction properties. It is a new multifunctional catalyst with high catalytic activity and good stability. It can be used for homogeneous and heterogeneous reactions, even as a phase transfer catalyst, and has no pollution to the environment. It is a green catalyst.
Phosphotungstic heteropoly acid
Keggin-type phosphotungstic acid, that is, phosphotungstic heteropoly acid, generally this structure of phosphotungstic acid refers to dodecaphosphotungstic acid. It belongs to a solid strong acid, which can be used as a catalyst in organic catalytic reactions and has excellent catalytic performance. The pure product is generally light yellow crystal or white powder.
Potassium tungstate
Potassium tungstate is colorless or white crystalline powder, easily soluble in water but insoluble in alcohol. It is used as an analytical reagent, a precipitant for alkaloids, and is also used in the refining of tungsten and the manufacture of bronze.
Silicotungstic acid
Silicotungstic acid is white or light yellow deliquescent crystal, easily soluble in water and alcohol. It dissolves in its own crystal water when heated, and decomposes when heated to 600-650°C. Mainly used in biochemical reagents and mordants for basic dyes.
Silver tungstate
Silver tungstate is light yellow crystal or powder, soluble in nitric acid, ammonia water and potassium cyanide solution, mainly used in catalyst, electronics and chemical industries.
Strontium tungstate
The properties of strontium tungstate are colorless tetragonal crystal system. The solubility in water at 15°C is 0.14g/100mL H2O. It decomposes in acid and is insoluble in ethanol and other organic solvents.
Zinc tungstate
Zinc tungstate is white powder, stable under normal temperature and pressure. As an important inorganic material, it has a wide range of applications in optics, acoustics, magnetism and many other aspects.
Zirconium tungstate
Zirconium tungstate compound has the advantages of high density, large volume fraction, low expansion coefficient, etc. It has important applications in integrated circuits, optical devices, aerospace engines, dental materials, and sensors.
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