Using Heat Reduction Method Producing Bronze Phase Tungsten Oxide

In fact, heat reduction method is the general term of many ways. Using production bronze phase tungsten oxide as example, there are solid - solid state reaction, the solid - molten reaction, gas - solid state reaction, thermal decomposition reaction and hydrothermal dissolution reactions and so on. In addition to hydrothermal and solvothermal reaction method, several other production methods require at higher temperature and reducing atmosphere, and this will inevitably increase the requirements for instruments and high energy consumption, difficult to control the reaction, the reaction process is easy appeared mixed phase. Therefore, it is not the best choice for producing bronze phase tungsten oxide. The hydrothermal and solvothermal synthesis method has many advantages which get more and more people's attention. some researchers using glacial acetic acid and ethylene glycol as a solvent, and in autoclave which having lined stainless steel for 5 days at 200 ℃, the (NH4) 10W12O41 reduced to sixty thousand bronze with (NH4) xWO3.

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