The study found that the calcine temperature for blue tungsten oxide fisher particle size has little effect. It is generally believed that during calcine process due to stress crystals and crystal phase change weight, resulting in cracks or broken into particles of irregular particles, but basically maintained the original APT particle dimensions. Blue tungsten fisher particle size only reflect the particle size dimensions, closely related to APT particle, blue tungsten fisher particle size therefore determined by the APT particle size.

 In-phase component ATB and W20O58 which has different size，at 800 ℃ condition reducing found blue tungsten oxide fisher particle size has a significant impact on  the reduction of tungsten powder. In the case of blue tungsten surface area substantially the same situation, W20O58 phase component blue tungsten oxide fisher particle size from 7.9um to 12.94um, tungsten powder particle size is reduced from 1.7um to 0.99um. The ATB phase component blue tungsten fisher particle size from 6.22um increase to the 14.00um, the tungsten powder particle fisher particle size from 1.25um down to 1.12um.

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

Tungsten target is also known as tungsten sputtering target. With high melting point, elasticity, low coefficient of thermal expansion, resistivity and fine heat stability, pure tungsten and tungsten alloy targets are widely applied in electrical industries (such as, LED and LCD), chemical equipment (X-Ray tube, thin-film material, semiconductor integrated circuit, two-dimensional display, solar photovoltaic and surface engineering.), medical equipment, smelting equipment, rare earth smelting, aerospace and many other fields.
Now a new way-PVD (physical vapor deposition) has been used to sputter thin-film material. The product made in this way owns high density, smooth surface, no stratification, no double skin, no crack and no impurity and good adhesiveness. And with the growth demand of high pure metal and alloy targets, the magnetron sputtering techniques has been widely applied. It can work with both older sputtering devises as well as the latest process equipments, such as large area coating for solar energy or fuel cells and flip-chip applications.

 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 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

Tungsten powder is an important raw material for cemented carbide making. The large crystal grain size will cause cracks or breakage during use carbide. The large crystal grain size is mainly crease by coarse tungsten powder particles.

Therefore, in order to improve the performance of cemented carbide tungsten powder producing becomes very important process. Tungsten powder for the preparation becomes even more important. Blue tungsten oxide producing tungsten powder continues to mature, and is widely used in industry. Currently circulating reducing blue tungsten oxide method to control tungsten powder particle size has been widespread concern.

Firstly blue tungsten obtained from calcine extra virgin ammonium paratungstic in argon, and then after that we found the blue tungsten oxide particle size distribution uneven and also there has large cracks on the practical, but the cracks in favor of hydrogen into the interior of blue tungsten and make reduction which provides favorable conditions for refine tungsten powder particle size. The first time for Blue tungsten oxide reduction we cam obtain tungsten powder particle size between 5-15um. The first reduction of tungsten powder oxidized in the air became tungsten trioxide, and then making a second time reduction which we get tungsten powder particle size between 3-10um. From this we can see that the tungsten powder particle size reduction through the loop once and oxide twice was significantly better than using blue tungsten oxide reduction of tungsten powder for only once.

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

Blue tungsten oxide is widely used in industrial processes mainly because of blue tungsten has many advantages such as high chemical activity, good doping effect, large surface area, reducing efficiency. China added K, Si, AI and other alkali metal oxides to produce tungsten wire is applied from the mid-1970s to the present.

But using blue tungsten oxide technology manufacture tungsten wire not only require a lot of money and equipment, and it also will bring great problems at repression which will cause tungsten blanks low yield, increased production costs. At the part of adding blue tungsten oxide pickling process will produce Hydrofluoric acid and it will lead to contamination the environment. So that subsequent processing pickling process more complex.

From the process is applied to the industries to now it has being developed and improved, for example, controlling the temperature when APT reduction the blue tungsten, tungsten powder ingredients doped est.. At present, the process has been able to meet the needs of electric light source industry basically. And not-acid washing of blue tungsten oxide process has also made a great progress, so that the improvement of the quality of tungsten blanks, decrease production costs.

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