Ammonium Paratungstate Preparing Coarse Spherical Tungsten Powder Affecting Factors

Ammonium paratungstate preparing coarse spherical tungsten powder affecting factors are listed as below.

1.Adding NaCl and Li₂CO₃ will affect the grain size of ammonium paratungstate. Adding NaCl and LiCO₃ will enlarge the grain size of ammonium paratungstate. But the effect of Li2CO3 is more apparent. The grain size can reach 60um.

2.As the reduction time prolonged, grain size of tungsten powder increases. This is because the fine tungsten oxide particles volatilize and deposit on the tungsten macro tungsten powder which increase grain size of tungsten powder gradually.

3.Adding additives. Adding alkali metal salt will enlarge the grain size of tungsten powder. When the grain size is between 45-61um, tungsten powder grain size grows rapidly. It turns out that Li will maximize the growing of tungsten powder. When the particle size reaches 100um, the growing speed slows down, the average size of tungsten powder reaches 67um which can meet the requirement in industry.




Tungsten Manufacturer & Supplier: Chinatungsten Online -http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

• < Prev
• Next >