TBO is the abbreviation for tungsten blue oxide. It is not a defined tungsten compound, but a powdery mixture of multiple tungsten compounds whose chemical composition and physical properties are changing. Tungsten blue oxide is gradually replacing traditional tungstic acid and yellow tungsten oxide (tungsten trioxide) to become an important tungsten intermediate compound.

 High quality tungsten carbide powder has the advantages of high melting point, high hardness and good stability. It has a wide range of applications and can be prepared by direct reduction carbonization technology.

 Coarse crystalline tungsten carbide powder has some special properties and special applications that are different from those of medium and fine grain size tungsten carbide powders. It has gained increasing attention in various industrial fields.

 The traditional method for preparing coarse crystalline tungsten carbide powder is to use tungsten trioxide for high-temperature reduction to obtain particulate tungsten powder, and then coarse-grain tungsten powder for high-temperature carbonization to obtain coarse-grained tungsten carbide powder.

The production process of coarse crystalline tungsten carbide powder, in addition to the traditional high-temperature reduction high-temperature carbonization method, has also appeared in the high-temperature carbonization of medium-grain tungsten powder and high-temperature carbonization of fine-grain tungsten powder; aluminum heat reduction carbide method coarse tungsten carbide powder technology; In addition, special graded method to obtain high-quality coarse-grain tungsten carbide powder and other processes.

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BTO nanopowder has good catalytic performance and is the main catalyst or auxiliary catalyst in the petrochemical industry. It can also catalyze many reactions such as hydrogenation, dehydrogenation, oxidation, hydrocarbon isomerization, alkylation, and so on.

Ultrafine BTO powder may be prepared by APT calcination method.

 The coarse grain size crystalline tungsten carbide powder is produced by high-temperature reduction and high-temperature carbonization, and has a series of advantages such as microscopic structure, less defects, high microhardness, and small microscopic strain. It also has a different range of use with medium and fine grain tungsten carbide powders.

Coarse BTO powder may be prepared by APT mild hydrogen reduction method.

Fine BTO powder itself does not have lubricating property, but it may be applied to produce a new type solid lubricant - tungsten disulfide. Tungsten disulfide (WS2) adopts a layered structure related to molybdenum disulfide (MoS2), with W atoms situated in trigonal prismatic coordination sphere. As lubricant, WS2 has better performance than MoS2, such as larger compressive strength and lower friction coefficient.

99.9% blue tungsten oxide has a wide application. There are some main applications as follows.

Ultrafine blue tungsten oxide is a blue powder with ultrafine grain size.