| Customization: | Available |
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| Classification: | Clay |
| Feature: | Long Time Materials |
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Alumina crucible is mainly used as a container for analyzing and firing materials or products produced and used in all industries such as coal analysis, analyzing and smelting of metal, analyzing and firing of chemical raw materials, analyzing and founding of glass, analyzing and firing of raw materials such as rare earth, and minerals, firing of high-temperature products such as ceramics, and the founding of single-crystal raw materials.
Alumina crucibles represent a cost-effective alternative to certain other materials when heat resistance and corrosion resistance are essential. Specifically, alumina offers:
High-alumina Crucibles Various Sizes, Materials Physical and Chemical Index, different technique datas of different alumina percentage
Materials Physical and Chemical Index
| Item | Unit | AL99.7% | AL99 | AL95 |
| Al2O3 content | - | 99.7% | 99% | 95% |
| Color | - | Ivory white | Ivory white | Ivory white,white |
| Air tightness | - | airtight | airtight | airtight |
| Density | g/cm3 | 3.94 | 3.8 | 3.7 |
| Straightness | - | 2‰ | 2‰ | 2‰ |
| hardness | Moh's hardness | 9 | 9 | 8.8 |
| Water absorption | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
| Flexural strength(20ºC) | Mpa | 375 | 340 | 304 |
| Compressive strength(20ºC) | Mpa | 2300 | 2210 | 1910 |
| Thermal expansion coefficient (25ºC-800ºC) | 105/ºC |
7.6 | 7.6 | 7.6 |
| Insulation strength(thickness:5mm) | AC-kv/mm | 10 | 10 | 10 |
| Dielectric loss 25ºC@1MHz | - | <0.0001 | <0.0006 | <0.0004 |
| Volume resistivity (20ºC) (300ºC) |
Ω·cm3 |
>1014 >1010 |
>1014 >1010 |
>1014 >1012 |
| Long-term use temperature | ºC | 1700 | 1600 | 1200 |
| Thermal conductivity(25ºC) | W/moK | 35 | 34 | 20 |
Alumina Ceramic Crucibles Capacity: 5-1500ml, maximum capacity can be customized.
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