Corundum Crucibles
Product Description
Corundum Crucibles are crucibless with an alumina content of more than 95%, and their scientific name are alumina crucibles. 99.70% corundum crucible has good high temperature insulation and mechanical strength in redox atmosphere at 1800℃ and 1650℃-1700℃, high thermal conductivity and low thermal expansion. They do not react with air, water vapor, hydrogen, carbon monoxide, etc. above 1700 ℃. The maximum short-term service temperature is 1800 ℃.
Product Features
The 85.00% high alumina crucible at 1350 ℃ 1290 ℃ has good high temperature insulation and mechanical strength in oxidation and reduction atmosphere. High thermal conductivity and low thermal expansion. They do not react with air, water vapor, hydrogen, carbon monoxide, etc. They can be used for a long time under the condition of little temperature change in temperature field. The maximum short-term service temperature is 1400 ℃.
Product Advantages
1) High hardness.
2) High heat resistance: Corundum Crucibles have excellentthermal stability, which means that it is widely used in areas where resistance to high temperatures is essential.
3) Good wear resistance: alumina ceramic is the material of choice for alumina wear parts.
4) High electrical resistivity: alumina is an electrically insulating material.
5) High corrosion resistance: it is insoluble in water and only slightly soluble in strong acid and alkaline solutions. Good chemical stability of alumina leads to high corrosion resistance.
Product Application
Corundum Crucibles are commonly used in a variety of metal or non-metal melting material, or melting items analysis in the lab, also it's a regular application for smelting & sintering for phosphors, rare earth material, precious metals.

Product Parameters
Chemical Composition | Al2O3 ℃99% |
Density | 3.8 g/cm3 |
Coefficient of Thermal Expansion | ℃7.1×10-6/℃ |
Thermal conductivity | 25 w/(m.k) |
Mohs Hardness | 9 |
Firing temperature | 1800 ℃ |
Long Time Working Temperature | 1400 ℃ |
Max Working Temperature | 1600 ℃ |
Modulus of Elasticity | 350 Gpa |
Flexural Strength | 340 Mpa |
Compressive Strength | 2200 Mpa |
Fracture Toughness | 4 MPam1/2 |
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