Purple Tungsten Oxide Chemical Property

Purple tungsten oxide (Violet Tungsten Oxide, VTO), referred to as purple tungsten. Purple tungsten oxide refers to paratungstate (Ammonium Paratungstate, APT) as raw material was calcined under certain conditions, decomposition, reduction generated purple tungsten oxide. General purple or blue-purple crystalline powder. By strong fissile octahedral structure, intrinsic crystalline needle and rod. Purple Tungsten is a tungsten oxide, the chemical formula for WO2.72 or W18O49. Purple and yellow tungsten oxide, tungsten (the yellow tungsten WO3), blue tungsten oxide (referred to as blue tungsten W20O58 or WO2.90) and brown tungsten oxide (WO2) collectively known as tungsten oxide. The tungsten oxide can be used as raw material for the production of tungsten powder, tungsten because of its unique nature purple to purple tungsten tungsten powder products as raw materials, has generated fast, fine-grained and so on.

Purple tungsten oxide is pure secondary ammonium tungstate reaction under argon, then the Purple tungsten oxide deoxy prepare tungsten powder particles. (Purity: 99.99%, dewpoint -40℃), tungsten powder oxidized in the air. Tungsten oxide and tungsten powder is reduced in hydrogen, the sample was placed in a laser particle size distribution measuring instrument and the field emission scanning electron microscope, can exhibit its properties. Through two cyclic oxidation and reduction of three, will be ultrafine tungsten powder. Particle size distribution of ultrafine tungsten powder 0.1 μm to 1.0 μm is between 95.73%.

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