Using a reducing agent to restore pure tungsten, then compound to the metal tungsten powder pyrometallurgical process for tungsten metallurgy process components. Production of tungsten powder of pure tungsten compounds has tungsten trioxide, ammonium paratungstate and tungsten blue, general use of hydrogen, carbon and other reducing agents. Since the application department of chemical purity has stringent requirements of tungsten powder particle size and particle size distribution, so often choose different production methods is according to the different requirements of the tungsten powder. Tungsten powder at modern industrial production are more widely using hydrogen reduction of tungsten trioxide, hydrogen reduction of ammonium paratungstate and blue tungsten oxide hydrogen reduction. The producing method of using tungsten carbide powders also adopted the hydrogen reduction of tungsten trioxide. Modern is more commonly used hydrogen reduction of ammonium paratungstate. Producing blue tungsten oxide, now industries are wildly using hydrogen reduction of tungsten powder method making blue tungsten oxide. Developed in the 1960s fluorine (chlorine) tungsten hydrogen reduction method using hydrogen reduction of gaseous fluorine (chlorine) can be prepared tungsten grade tungsten powder or ultrafine particles can be made directly tungsten tube and other metal products.

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

 

Sol-gel treated chemically or physically method, the whole class into a solid dispersion system was highly uniform. It is mainly through pulling, spin coating method, the sol coating on a substrate film. Producing of nanometer sol-gel thin films of tungsten trioxide is simple, low cost, large-area deposition characteristics of easy, low-temperature synthesis, materials, and shape diversity. Producing of the sol-gel method is currently tungsten trioxide films generally have the following types: tungstate acidification, tungsten powder peroxide polytungstate law, tungstate ion exchange method, alcohol saline solution tungsten, tungsten catch alcoholate law. When using sol-gel method of WO3 thin Films, tungsten-containing precursor solution is acidified typically NA2WO4 H2WO4 can get through ion exchange resins. Due to the high stability of peracetic acid, peracetic acid producing of WO3 films are widely used. During the producing of the environmental humidity will affect the morphology of the film material, the higher the humidity，he higher the gap film, excellent in thin-film photovoltaic performance. Meanwhile dispersant prepared thin films have a greater influence on. The study found that organic molecules added dispersant helps to reduce the size of the film nanocrystalline particles increase the porosity of the film.

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

 

Nano tungsten trioxide films have been used widely in modern technology, and the application and research has became more and more popular. It also has a lot of producing method. But the nature of the film is closely related to the producing and producing conditions, WO3 films proceed by different preparation methods vary in size and crystalline form, common methods are summarized below: Evaporation, sputtering, chemical vapor deposition, electro deposition and sol - gel method and so on. Materials at high temperatures will evaporation, then to producing a variety of thin film materials. Evaporation method has some obvious advantages, such as higher deposition rate, a relatively high degree of vacuum and high purity of the resulting film and the like. Evaporative cooling method include evaporation, electron beam evaporation, arc evaporation, laser evaporation method, a hollow cathode evaporation, thermal evaporation method or the like, wherein the thermal evaporation method is one of the more used methods. Purity films prepared by evaporation is high, the particles dispersed. By varying the pressure and temperature controlled atmosphere, different particle sizes can be prepared nano film, suitable for the synthesis of low melting point, film or particulate matter of a single component. However, this production method generally requires high temperatures and vacuum conditions, preparation of complex and expensive equipment, suitable for the preparation of large area thin film.

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 trioxide films in information displays, low voltage devices, gas sensors, spacecraft antireflective coating and infrared emission adjustment and other fields have broad application prospects. This is the nano tungsten trioxide in the electrolyte discoloration of related applications. Electro chromic material refers to a reversible electrochemical reaction occurs under the action of an electric field, thereby generating the color effect visible light absorption. WO3 is no research first electro chromic material. Electro chromic material must have reversible under the control of voltage and current can change its optical properties. When the W03 and H + or Li + together absorb electrons reducing tungsten oxide absorption and reflection of light, showing gray-blue. In recent years, it was discovered that WO3 electro chromic material has great potential application of large-area solar devices, so research focused on aspects of the automotive industry and controllable solar windows. Japan has launched electro chromic panels, and to evaluate its performance; actively studied US also made a "smart windows" as well.

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 Carbide Rod Sintering

Sintering is the last process of tungsten carbide rod extrusion method. It affects the density and chemical properties of the products in a large degree. It also decides the performance and quality of the products. Due to a lot of binder is being used in the process of tungsten carbide rod extrusion, the shrink rate is very large during the sintering (it can reach to 12%-18%). So the control of shape and dimension is a big problem. And the tungsten carbide rod extrusion method makes it become a shape piece, it becomes more significant.

Also, the sintering temperature, atmosphere and the heating rate have a great influence on the performance and quality of the product. Currently, tungsten carbide rod is being processed via vacuum sintering + HIP (hot isostatic pressing) and low pressure sintering. Plasma discharge sintering (SPS), microwave sintering and some fast, low temperature sintering technology has become a new search area. 


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 Carbide Rod Cold Isostatic Process

Tungsten carbide rod cold isostatic process includes pressure cutting method, wet bag method and dry bag method.
1.Pressure cutting method. First pressing the grinded carbon powder into a block and treat it with the cold isostatic process. And then carry the continuous processing. Only a small amount of plasticizer like polyethylene ethanol and paraffin are required in this process. No plasticizer is required if the pressure is high enough. The tungsten carbide rod made through this method is very rough. It needs to be processed again before it becomes a finished product.

2.Wet bag method. The mould is averagely under the same high pressure liquid (about 200MPa), the specimen size is limited by the cavity, as a result it's not suitable for mass production. This method is mainly for large diameter bar.

3.Dry bag method. This method uses different liquid as transmission medium. The mould is semi-fixed. The blanks are being adding and removing under dry condition. Due to the high degree of automation and shorter operation circle, it is suitable for mass production. 


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
 

Ion gun tungsten filament (IG tungsten filament) is made of tungsten wire, which is indispensable components in scientific research and semiconductor manufacturing equipment and has been used to produce high current of H− ions and other aspects. Ion source filament owns many different types, such as single helix cylindrical filaments with one turn, flat spiral filaments, or planar filaments and so on. The major deficiency of its performance is that the energetic electrons produced by the surface of interior metal will escape. So the magneto-static fields produced by permanent magnets are designed to recapture more energetic electrons with lower number of permanent magnets to avoid this problem. To suit equipment requirements and functionalities, we modify appropriate filament configurations and specifications when we design such equipment. Tungsten is the most common functional material used to fabricate ion source filaments. Ion gun tungsten filament has some features that make it distinct from other materials.

 

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

Most tungsten steel bracelet engraved lettering contents of letters and numbers on the bracelets lettering location due lettering is relatively small, so the lettering processing requirements higher, compared with the ceramic bracelet, tungsten steel strap easier lettering because ceramics brittle texture processing difficult.


 

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.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 Rings since birth, with the change of people's preferences and requirements, there has been lettering Tungsten Rings, Tungsten Rings lettering is carried out according to the different needs of people working in the ring lettering, lettering, custom content, such as relatively simple content patterns, text, numbers, etc. can all be produced. Tungsten ring ring lettering in comparison to the more personal and creative general tungsten steel, popular with young people.



Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.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