The results turn out that submicron tungsten powder can be prepared with violet tungsten oxide through circulatory deoxidization triplicately,the deoxidization technique is as follows: the first temperature is 640 ℃,the second temperature is 760 ℃ and the third temperature is 860 ℃.

The results show that different tungsten oxides,including violet tungsten oxide,blue tungsten oxide and yellow tungsten oxide,are of different microstructure.

Two kinds of ultra-fine carbides were synthesized by adopting blue and purple tungsten oxides as raw materials respectively.

This paper introduces the principle of purple tungsten oxide composition and production,the details of production process control,detection methods and the use of ultra-fine tungsten powder and ultra-fine cemented carbide.

Effect of tungsten on microstructure of as-cast TiAl alloy afterannealed and heat treated at 1265 ℃ for 18 h;

Transplanting scientific research achievement to chemistry innovation teaching experiment ——simultaneously determining contents of molybdenum and tungsten in mixture solution by spectrophotometry;

Genetic neural network-spectrophotometric determination of tungsten,molybdenum and titanium;

Determination of Wolfram Content in Low Alloy Steel with ICP-AES Method;

Study on Color Reaction of Diiodophenylfluorone with Wolfram and Its Application in Steel Analysis;

Determination of Wolfram by Catalytic Ac-Oscillopolarographic Analytical method;