Tungsten dioxide volatile low than tungsten trioxide, so in the industries they use a two-stage reduction method to take tungsten powder.

Blue tungsten oxide forms including composition, phase composition, surface area, fisher particle size, oxygen index and residual volatiles. The calcine temperature and atmosphere of process parameters is the main factors influence blue tungsten oxide forms. Calcine temperature influence bule tungsten oxide specific surface area size. After the different calcine temperature we found that specific surface area also different. It is reported that blue tungsten surface area will decreased with calcine temperature increases. calcine temperature is 400 ℃, blue tungsten oxide surface area will reach 16.31㎡ / g, and when the calcine temperature is to 500 ℃, the specific surface area decreased to 10.07m³ / g. From the study can found in order to make blue tungsten oxide has developed specific surface area, APT calcine temper should at a lower temperature. Although the high calcine temperature help to improve the size distribution of the tungsten oxide particles, and it will lead to the sharp of tungsten powder decrease intense and in products will generate large aggregates. Therefore, the results from this study can be found to make the blue tungsten oxide holding developed specific surface area, APT should calcine at a lower temperature.

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.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 >