Alumina crucible is an important equipment in smelting industry. Generally, alumina content in crucible is more than 95%, which is called corundum crucible.

The shape of corundum crucible is generally arc-shaped and cylindrical, while pure alumina crucible is alumina crucible, square alumina crucible, alumina aluminum crucible (rectangular alumina ceramic crucible), straight (cylindrical) alumina crucible and various special-shaped alumina ceramic crucibles.

Alumina crucible has excellent performance, high temperature resistance, acid and alkali resistance, quench and heat resistance and chemical corrosion resistance.

The alumina crucible sample is suitable for melting in anhydrous Na2CO3 and other weak alkaline substances as flux, and Na2O2, NaOH and other strong alkaline substances and acidic substances as flux (such as K2S2O7, etc.).

The general specification of alumina crucible is 5-1000ml.

Working principle of alumina crucible:

1.99.70% corundum 1800 ℃ - 1650 ℃ - 1700 ℃ corundum crucible has excellent high-temperature insulation and mechanical strength in redox environment. High heat transfer and low expansion. When it exceeds 1700 ℃, it has no reaction with air, steam, hydrogen, carbon monoxide, etc. The short-term service temperature is 1800 ℃.

2.99.35% corundum 1750 ℃ - 1600 ℃ - 1650 ℃ corundum crucible is in redox atmosphere.

3.85.00% High Aluminum 1350 ℃ 1290 ℃ high aluminum crucible has excellent high temperature insulation performance and mechanical strength in redox environment. High heat transfer and low expansion. No reaction with air, steam, hydrogen, carbon monoxide, etc. It can be applied to the temperature field for a long time with small temperature change. Short time service temperature 1400 ℃.