Home > Industry > The Forming Method and Application of ZrB2 Ceramics

The Forming Method and Application of ZrB2 Ceramics

wallpapers Industry 2020-07-21

There are many molding methods for ZrB2, such as isostatic pressing, dry pressing, grouting, and coagulation. People can choose different molding methods according to their needs and actual conditions. To increase the density of products and reduce the sintering temperature, most people use hot pressing sintering, a process of forming and sintering at the same time. Still, only ZrB2 ceramic products with simple shapes can be obtained.

The traditional sintering methods of ZrB2 materials include pressureless sintering and hot pressing sintering. New sintering methods include in-situ reactive hot pressing, high-temperature self-propagating sintering, and spark plasma sintering.

Zirconium diboride ceramics are valued and applied in high-temperature structural ceramic materials, composite materials, refractory materials, electrode materials, and nuclear control materials because of their high melting point and hardness, good electrical and thermal conductivity, and strong neutron control ability, such as turbine blades and magnetic fluid power generation electrodes in the aviation industry. Besides, compared with many ceramic materials, it has better electrical conductivity and can be used to produce parts with complex shapes through wire cutting technology.

Refractory

ZrB2 ceramics are excellent unique refractory materials, which can be used as high-temperature thermocouple protection sleeves, molds, metallurgical metal crucibles, etc. When used as thermocouple protection sleeves, they are not very airtight and conductive. Therefore, it must be matched with the alumina's inner jacket for useful temperature measurement. The thermowell of this material can be used continuously for a long time in molten iron and brass melt. ZrB2 ceramics can also be used as an antioxidant for refractory materials.

Electrode material

ZrB2 is suitable for electric shock materials and electrode materials due to its low resistivity and electronic conduction as its conductive mechanism. It can be used in metal thermocouple electrodes and high-temperature heating elements. In 1994, a researcher developed a sleeve-type thermocouple material paired with ZrB2 and graphite. Experiments have shown that it can work in an oxidizing atmosphere at 1200~1600℃. The value of the thermocouple is more significant, reaching about 70mV at 1600℃. The potential thermoelectric rate is higher. It can play a role in continuous temperature measurement on special occasions where metal thermocouples and radiation thermometers are not suitable. It is a good thermocouple material.

Other materials

Due to its extremely high hardness, ZrB2 is an excellent wear-resistant material and has useful applications in cutting tools and cutting tools. Because ZrB2 has excellent corrosion resistance, the anti-corrosion and anti-oxidation film of ZrB2 has been studied in depth abroad.

Zirconium diboride ceramics are valued and applied in high-temperature structural ceramic materials, composite materials, refractory materials, electrode materials, and nuclear control materials because of their high melting point and hardness, good electrical and thermal conductivity, and strong neutron control ability.


Say something
  • All comments(0)
    No comment yet. Please say something!
Tag: ZrB2