Pure tungsten plate is a flat plate made of tungsten material, which has very high hardness, density and melting point. Tungsten is a very corrosion-resistant metal, so tungsten plate can be used to make parts with high temperature resistance, corrosion resistance and wear resistance, such as in aerospace, semiconductor, chemical industry and other fields. Tungsten plate can be produced by pressing, sintering, rolling, drawing and other processes.
1. Feature
The following are the characteristics of pure tungsten plate:
- High melting point: It is a high melting point material with a melting point of about 3410°C, the highest melting point of all metals.
- Corrosion Resistance: It is known for its excellent corrosion resistance and can be used in both oxidizing and reducing environments.
- High atomic weight: It has a high atomic weight, so it plays an important role in the fields of nuclear reaction and X-ray technology.
- High density: The density of pure tungsten sheet is as high as 19.3 g/cm3, which is a commonly used high-density material on the market.
- Ease of processing: It is widely used in various industrial and scientific applications due to its toughness and corrosion resistance, which can be easily formed.
1) Physical Properties
- Density: 19.3 g/cm3
- Melting point: 3422 degrees Celsius
- Coefficient of thermal expansion: 4.5×10^-6/K
- Thermal conductivity: 173W/mK
- Conductivity: 31.2×10^6/(Ω.m)
- Hardness: 250-300HV
- Toughness: Poor
2) Chemical properties
It can withstand high temperatures and high-pressure environment, has a high melting point and is not susceptible to chemical corrosion.
The surface is easily oxidized in the air, forming a hard oxide film to protect the interior from being damaged to a certain extent.
Although it has excellent corrosion resistance, at high temperatures, hydrogen permeation phenomenon inevitably occurs, leading to material degradation.
Soluble in aqua regalia, easily corroded in hydrochloride acid and molten alkali metals.
2. Application Fields
Pure tungsten plate is usually used to manufacture heating devices and protective covers for high-temperature furnaces, because Tungsten has a very high melting point and excellent high-temperature corrosion resistance, and can maintain stable physical and chemical properties at high temperatures. In addition, Tungsten plate is also widely used in high-tech fields such as electrodes, electronic components, aerospace devices, and nuclear reactors.
3. Working Principle
Pure tungsten sheet is a plate made of pure tungsten, and its working principle mainly depends on the physical and chemical properties of pure tungsten.
First, pure tungsten has a very high melting point (3422°C) and high heat of fusion, which makes it a high-temperature-resistant, high-strength material. Therefore, pure tungsten sheets can work under high temperature, high pressure and strong acid and alkali environment.
Secondly, pure tungsten has very low permeability to electromagnetic waves, so it can be used as a radiation protection material. In addition, pure tungsten also has very high thermal conductivity and a high coefficient of friction, which makes it suitable for the manufacture of high-temperature components, electrodes, contacts, etc.
In short, the working principle of tungsten plate depends on the physical and chemical properties of pure tungsten, such as high-temperature resistance, high strength, radiation protection, thermal conductivity, and high friction coefficient.
4. Production Processes
The production process of pure tungsten plate can be divided into the following steps:
1) Raw material preparation: choose high-purity tungsten powder and appropriate amount of other additives, such as carbonizing agent.
2) Powder making: Mix tungsten powder and additives evenly, put them into a ball mill for grinding and mixing, generate heat, and generate tungsten powder particles.
3) Pressing: Apply pressure on the prepared tungsten powder particles to form a suitable thickness and size.
4) Sintering: Put the pressed tungsten powder plate into the sintering furnace and bake it at high temperature to combine the particles to form a hard plate.
5) Machining: cutting, trimming, and grinding the sintered tungsten plate to achieve the required size and flatness.
6) Inspection: Carry out quality inspection of the board, such as hardness, density, size, etc.
7) Packing: Pack the qualified pure tungsten sheet, and store or transport it to the place where it needs to be used.
The above is the production process of pure tungsten sheets. Different manufacturers may have differences in details, but the basic production process is similar.
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