Single crystal ammonium paratungstate is a key material for producing high quality tungsten wire, which is always applying in cars. That is because the single crystal APT has the characteristics of good tensile property and fracture resistance. And the tungsten wire using the single crystal APT as raw material has yield of 90%, which is higher than that of adopting polycrystalline paratungstate ammonium as raw material with yield of 70%. Single crystal APT also has many other excellent physical properties so that it is an ideal raw material for preparing high-performance tungsten materials.
In a word, the crystal characteristics of ammonium paratungstate, such as average particle size, particle size distribution, crystal morphology, apparent density and liquidity, have a great influence on the properties of subsequent powder metallurgy products such as tungsten powder, tungsten wire and tungsten alloy. Therefore, the research on the producing process and preparation principle of single crystal APT is of great importance.
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