Tungsten

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Tungsten Trioxide Safety Issues 155

Tungsten Trioxide, also known as tungsten anhydride (WO 3), is a yellow powder, insoluble in water and alkali, and slightly soluble in acid. It is widely used in our daily life and industry, but it itself is harmful. Therefore, when using Tungsten Trioxide, attention should be paid to the safety issues related to Tungsten Trioxide. The safety issues of WO 3 include avoiding human contact during use, keeping away from flammable materials during storage and emergency treatment after use. Firstly,…

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Tungsten Trioxide Uses 153

Tungsten Trioxide, also known as tungsten oxide (WO 3), has been widely used in many fields such as petrochemical industry, photoelectric information, national defense and military industry because of its special properties such as catalysis, optics and electricity. Tungsten Trioxide is mainly used as a catalyst in the petrochemical field. When it is used as a catalyst, it not only has high catalytic activity, long service life, but also is environmentally friendly, non-toxic and pollution-free. Basically, there is no need…

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What is Tungsten Alloy? 157

Ⅰ What is Tungsten Alloy? There are two definitions of tungsten alloy: (1) tungsten alloy in a broad sense: metal materials containing tungsten are collectively called tungsten alloy, such as tungsten-iron alloy, tungsten-copper alloy, tungsten-nickel alloy and cemented carbide; (2) Tungsten alloy in a narrow sense: an alloy material composed of tungsten as a matrix material and a small amount of metal binders such as nickel, copper, iron, cobalt, molybdenum and chromium, also known as high specific gravity tungsten alloy…

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Tungsten Alloy Aircraft Brake Pads 145

Tungsten Alloy Aircraft Brake Pad is an important part of aircraft braking device, which uses a series of excellent properties of tungsten alloy, such as corrosion resistance, easy processing, oxidation resistance and good high temperature strength, to meet the requirements of special conditions, such as high temperature and high pressure. It is mainly used to brake aircraft during landing. The aircraft brake system is multi-plate brake, which uses moving and static plates to arrange alternately. When the airplane descends for…

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Tungsten Trioxide Properties 149

Tungsten Trioxide (WO3), also known as yellow tungsten oxide, is an oxide of tungsten and an N-type semiconductor as well. These two characteristics make Tungsten Trioxide not only have high density, high boiling point and high melting point, but also have catalytic, optical and electrical properties. Tungsten Trioxide is a yellow powder, which is insoluble in water, soluble in alkali and slightly soluble in acid. Stable in air, insoluble in water and inorganic acids other than hydrofluoric acid, but slowly…

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Aviation Application of Tungsten Alloy 141

Tungsten Alloy has become one of the essential materials for aviation industry because of its high density, wear resistance and good thermal conductivity. The development of aviation industry represents a country’s economic and scientific development level and is an important criterion for judging a country’s comprehensive national strength. Therefore, the Chinese government strongly supports the development of this industry. With the continuous improvement of China’s comprehensive national strength and the support of a large number of policies, the aviation industry…

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What Is Tungsten Trioxide? 161

Tungsten Trioxide, also known as tungsten anhydride (WO3), is a yellow powder, insoluble in water and alkali, and slightly soluble in acid. Because of its good optical, electrical and gas sensitive properties, it is widely used in life, chemical industry, medical treatment and military affairs. I. Physical Properties Appearance and properties: yellow or yellow-green powder Melting point (°C): 1472 Relative density (moisture = 1): 7.1 Boiling point (°C): 1837 Relative density (water = 1): 7.16 g/cm 3 Molecular formula:WO3 Molecular…

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What are the Uses of Tungsten Alloys? 156

Tungsten Alloy is an alloy produced by powder metallurgy with tungsten powder as main raw material and Fe, Ni, Co as binder. It has excellent properties such as high melting point, high hardness, high strength, high specific gravity, creep resistance, thermal conductivity and electrical conductivity, and is widely used. I. Aerospace Industry Rotor materials of gyroscopes, inertial rotating elements of aircraft, balance weight elements of ailerons, steering rudders, engines, rotating blades of helicopters, etc. II. Military Industry Small arrows bundled…

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Tungsten Alloy Characteristics 147

Tungsten Alloy is an alloy with tungsten as the main element and added with Ni、Cu、Co、Mo、Cr and other elements. It has a series of excellent characteristics: the density is as high as 16.5-19.0 g/cm3; The specific gravity is 16.5-18.75 g/cm3. The tensile strength is 700-1000 MPa. Strong ability to absorb rays, 30-40% higher than lead; The thermal conductivity is 5 times that of die steel. The coefficient of thermal expansion is small, only 1/3-1/2 of iron or steel; Good weld ability…

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Brief History of Tungsten Alloy Development 188

The climax of research on the brief history of tungsten alloy development is mainly divided into the following four stages: The climax of the first research was from the Second World War to the middle and late 1980s. Politically, NATO and Warsaw Pact, led by the United States and the Soviet Union, had a cold war, and the East and the West were confronted with each other, which made the world political situation grim. In science and technology, the third…

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