What is the characteristic of zirconia brick?

Zirconia brick or zirconia tile is a heat-insulating refractory product made of zirconia as the main raw material. (The main crystal phase of this brick is cubic zirconia (about 70% to 80% of the mineral phase composition), the refractoriness is greater than 2400 ℃, the apparent porosity is 55% to 60%, and the volume density is 2.5 to 3.0 g. /cm3, the compressive strength is not less than 4.9MPa, and the thermal conductivity is 0.23~0.35w/(m·K). The production method of zirconia brick is the same as that of alumina hollow ball, except for its The melting temperature is higher, reaching above 2700℃, and CaO is widely used as a stabilizer in China.


The characteristics of zirconia brick:

Zirconia has high temperature resistance, chemical corrosion resistance, oxidation resistance, wear resistance, and a large coefficient of thermal expansion. Stable zirconia has become an important material that cannot be ignored in the refractory industry and special ceramics.

1) The ceramic foam made of stabilized zirconia can be used for the filtration of high-temperature alloys, and the ceramic foam is used for the filtration of molten steel continuous casting and has achieved a good purification effect.

2) Due to the high hardness of stabilized zirconia, it can be made into cold forming tools, shaping dies, wire drawing dies, cutting tools, grinding media, fish knives, scissors, golf club heads, etc.

3) Stable zirconia has high strength and good toughness, so it can be used to manufacture engine components, such as push rods, connecting rods, bearing cylinder linings, piston caps, etc.

4) Stabilized zirconia, with semiconducting and sensitive characteristics, can be made into solid electrolyte membranes for high-temperature fuel cells, etc.


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