December 13, 2021

Zirconium Diboride Powder

Brief introduction of ZrB2 Powder:

Zirconium diboride (ZrB2) is a refractory ceramic with a hexagonal crystal structure. This is an ultra-high temperature ceramic (UHTC) with a melting point of 3246°C. The material’s relatively low density (measured density may be higher due to hafnium impurities) and high-temperature strength make it a good candidate for high-temperature aerospace applications such as hypersonic flight and rocket propulsion. It is an unusual ceramic with relatively high thermal and electrical conductivity and is structurally similar to titanium diboride and hafnium diboride.

In nature, zirconium diboride is a hard gray crystal. There are three components of zirconium boride: zirconium boride, zirconium diboride, and zirconium tribromide. Zirconium diboride is the only material that is stable over a wide temperature range and mainly used in industrial applications. The melting point of zirconium diboride is 3040°C. It is a hexagonal crystal, gray crystal or powder. In addition to being resistant to high temperatures, zirconium diboride has a high strength at normal and high temperatures. Good shock resistance, low resistance, oxidation resistance at high temperature. It has a metallic nature and metallic luster. It has a lower resistance than zirconium. After heating, it stabilizes over a wide temperature range. Despite its high melting point, the material can be sintered at lower temperatures.

Typically, ZrB2 parts are hot-pressed (heated powder is pressed) and then machined into shape. During sintering, covalency and surface oxides hinder coarsening of the ZrB2 grains, which leads to densification. Additives such as boron carbide and carbon can react with surface oxides to increase the driving force during sintering. It is usually added to ZrB2 30 vol% SiC, through which SiC forms a protective oxide layer (similar to the protective coating of aluminum oxide) to improve oxidation resistance. Due to Zirconium Diboride’s high atomic defect energy (i.e. the atoms are not easy to deviate from their lattice positions), the material remains mechanically stable even at high temperatures, since defect concentrations remain low.

Application of Zirconium Diboride ZrB2 Powder:

Scientists and technologists are developing rockets, space shuttles, spaceships, long-range missiles, and supersonic aircraft in the direction of greater speed, greater thrust, and higher altitude, which puts forward higher requirements for aircraft with various performance characteristics. An enormous amount of heat is generated as a result of the friction between the aircraft and the atmosphere. A first step in improving aircraft materials is to improve their heat resistance, which should include refractory metals, carbides, carbon-carbon materials, and borides, among others. Several advantages of zirconium diboride ceramics make them widely used across a wide range of industries, including their high melting point, high hardness, high strength, high erosion resistance, chemical stability, and electrical conductivity.

The zirconium diboride material has excellent hardness and thermal conductivity, as well as resistance to corrosion and oxidation. It is mainly used in the thermal protection systems, high-temperature electrodes and heat trap pipes of reentry aircraft.

In addition to its use in aerospace, zirconium diboride can be used as a high-temperature resistant metal, a smooth and wear-resistant solid, a cutting tool, a temperature transducer tube and an electrode material electrolyzing molten compounds. Especially suitable for ball surfaces of rolling bearings.

Supplier of Zirconium Diboride ZrB2 Powder:

With over 15 years of experience manufacturing advanced materials, Shanghai Greenearth Chemcials Co., Ltd is a global supplier of Zirconium Diboride ZrB2 Powder, which has a wide range of experience in the properties, applications, and cost-effective production of engineered materials

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