Tungsten oxide (WOx) is a widely used transition metal oxides, tungsten oxide research people can be traced back to the 17th century, when some people study the properties of LiWO3, WO3 and synthetic NaWO3 and other content. With the development of nanotechnology, the preparation and analysis of tungsten oxide nanostructures are also more and more attention. Tungsten oxide nanostructures can significantly improve the performance of this important functional material, and given relative to the non-state in terms of the unique properties of nano, including:

(1) Increaseing the area / volume ratio, thereby providing more surface area for physical and chemical reactions; (2) significantly change the surface energy of the tungsten oxide, thereby changing the structure of the material surface bonded to different atoms;

(3) Quantum confinement effect, inherent nanostructured materials can significantly affect small charge transfer bandwidth and optical properties.

Tungsten oxide nanostructures with special versatility and unique properties, in many areas of condensed matter physics, solid state chemistry, where is a versatile metal oxides are studied in depth. Electrochromic applications, compared to TiO2, ZnO, NiO, etc., more in-depth study of tungsten oxide; in photocatalysis and sensors, tungsten oxide nanostructures is also of concern; research in solar cells, nano tungsten oxide Full oxidized form, tungsten oxide, although not as extensive as TiO2 and ZnO by in-depth research, but due to have similar features, but also cause for great concern. In recent years, some people will nanostructured tungsten oxide material supercapacitor electrode material for research, access to high performance super capacitor.

China has a very rich tungsten ore reserves, the development of high performance tungsten oxide material, with considerable significance.

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1. The name of the product design: Tungsten sinkers (fishing sinkers -3 prism type).

2. The use of product design: fishing gear. Design elements

3. The design: product modeling.

4. The best show design elements or photographs: the main view.

5. rear view and front view of the symmetry, after omitting view.

6. The left view and right view of symmetry, a right side view is omitted.


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Industrial blue tungsten oxide blue tungsten oxide is a powder mixture by a variety of tungsten compounds. Money is generally made of tungsten bronze, hydrogen tungsten bronze, tungsten trioxide, B-oxide (WO2.9) and y- tungsten oxide (WO2.272) mixing the composition, its apparent color when the oxygen index (O/W) from 2.27 to 3.0 continuous change to yellow and purple. It is gradually replacing the traditional yellow WO3 tungstate and tungsten become an important intermediate compounds. Blue tungsten oxide production, the industry is generally used four muffle furnace and rotary tube furnace under a protective atmosphere or confined conditions, ammonium paratungstate generate blue tungsten oxide to 060 ~ 90C temperature calcination.

Tungsten powder particle size is obtained by reduction 3 ~ 03um. Its color varies with the thickness of the particle size, the finer the powder particles, the darker the color. Coarse-grained tungsten powder is gray and has a metallic luster highlights; grayish black medium-grained tungsten powder; ultrafine tungsten powder dark black. Surfactant fine tungsten powder particles is large, exposed to the air it is easy to absorb moisture and surface oxidation. Ultrafine particles of tungsten powder needle without purification apt "spontaneous combustion" phenomenon jacket into tungsten trioxide produced tungsten metal powder reduction method using blue (yellow) color made of tungsten oxide, tungsten powder. Industrial value of the metal tungsten powder reduction method has four kinds: carbon reduction, carbon-containing gas reduction, decomposition of ammonia reduction and hydrogen reduction method, the most widely used method for hydrogen reduction.

Tungsten carbide powder and carbon can form two carbide, tungsten carbide that (WC) and two tungsten carbide (W2C). Tungsten carbide powder is one of the main raw material of cemented carbide, which is a high melting point, high hardness of the refractory metal carbide powder. Color with refined grains and deepened, fine particles of tungsten carbide powder was black. Production of tungsten carbide powder, tungsten carbide powder is a refractory metal carbide powder, its production in many ways, the value of industrial solid carbon carbonization, carbon-containing gas carbonation, casting carbonization, wider application of solid carbon carbonized method.

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Purple tungsten furnace temperature control is one with a pure delay, inertia, time-varying and nonlinear characteristics in the process. Realize their intellectual control, to reduce power consumption, improve product quality, extend the life of purple tungsten furnace has a very important significance.

Purple tungsten furnace has three plus tropical, with each band by three triggers, SCR, heater, thermocouple temperature loop control circuit, the trigger signal is given by the fuzzy expert controller based on the results of intelligent control algorithm, The structure is basically the same and independent of each other, the temperature setpoint changes with slightly different processes.

Lower furnace, purple crystalline tungsten needle morphology presented; the higher the furnace, purple tungsten rod-like crystalline morphology is presented. By reduction test found that the use of purple crystalline tungsten needle preparation of tungsten powder finer, but with purple crystalline tungsten rod tungsten powder preparation phase. So in the production practice to produce more granular tungsten powder, must be adjusted through the process, the production of purple crystalline tungsten needle.

How many non-needle-shaped particles is generally used to measure the merits of purple tungsten products, APT size increased, ammonia flow rate increases, will cause an increase in non-needle purple particles of tungsten products, tungsten unity influence purple phase component; and appropriate to reduce calcination temperature, you can reduce the non-needle-shaped particles of tungsten products purple, offset the impact of these factors brought about; but drop too low, would affect the purple tungsten content, the product Pellet stove or knot. So purple tungsten furnace temperature is a very important process parameters can be used to make up and change the balance of other process parameters, so that product quality tungsten violet stabilized. Therefore, the temperature setting and monitoring, is the key to purple tungsten furnace process control.

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