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ZrB2 can be used as an ultra-high temperature ceramic, UHTC, with a melting points of 3246°C. Its low density (about 6.09 g/cm3), and excellent high-temperature stability make it suitable for high-temperature aerospace applications like rocket propulsion systems or hypersonic flight.
It’s an uncommon ceramic that has high thermal and electric conductivity. This is similar to the hafnium and isomorphic Titanium.
ZrB2 parts can be hot-pressed, which means that they are heated to a powder before being machined. Covalentity of ZrB2 and surface oxides can cause problems in ZrB2 sintering. This causes grain to become coarser before it is densified during sintering. While pressureless ZrB2 can boost the sintering force via the reaction between sintering additions carbon and boron with surface oxidess, the mechanical properties are less than that of hot-pressed ZrB2.
You can add 30 vol% SiC (ZrB2) to increase the oxidation resistance. The protective oxide layer is very similar to protective alumina.
ZrB2 is used for ultra-high-temperature ceramic matrix composites (UHTCMCs).
Zirconium Diboride ZrB2 Ceramics
The high melting points and high conductivity of zirconium-diboride ceramics make them a valuable resource for nuclear control materials and composites.
Additionally, it is more conductive than many other ceramic materials. It can also be used in wire cutting to create complex-shaped parts.
Zirconium Diboride Uses
1. Refractory material
ZrB2 is a great special refractory substance that can be used to make casting molds, high-temperature temperature thermocouple protector bushings, and the crucible for metallurgical material. The airtightness and conductivity of ZrB2 ceramic are not great when it is used for thermocouple shielding. It must be combined to an aluminum oxide outer casing in order to perform temperature measurement. You can use the thermocouple sleeves of this material in brass and molten steel melt for long periods. ZrB2 ceramics may also be used in refractories as antioxidants.
2. Materials for electrode
ZrB2 can be used for electrode materials and electric contact materials due to its electronic conduction mechanism and low resistance. A casing thermocouple material was developed in 1994 by researchers that was compatible with ZrB2 as well as graphite. The ability to work under an oxidizing atmosphere (1200-1600) has been demonstrated by experiment. A large value thermocouple, at 70 mV at 1600 is possible, as well as a very high thermoelectric potential rate. The thermocouple can be used to measure temperature in special circumstances where a metal thermocouple or radiation thermometer is not available.
ZrB2 has an excellent wear resistance and is used for cutting tools. ZrB2 is a highly resistant material that has attracted a lot of attention due to the fact it can withstand corrosion.
Zirconium Diboride Supplier
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