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1. Product details
High Temperature Al2O3 Ceramic Tubes in Furnace and gas Boiler
Al2O3 Ceramic Tubes is made of alumina ceramic material and Fired through high temperature
Applications: Industrial Ceramic Tubes widely used in the high corrosive and high-temperature environment like thermal power.
1. Kiln furniture
2. Furnace work tubes
3. Vacuum furnace parts
4. Electrical insulators
5. Heating element supports
6. Temperature measurement
Main Features:
• Excellent thermal conductivity
• Excellent thermal shock resistance
• Low wetting by alumina
• Available in a wide variety of formulations
• Excellent high temperature and abrasion resistance
• Excellent oxidation resistence
Performance index | ||||||||
AL2O3 Purity % | 60 | 75 | 80 | 85 | 92 | 95 | 99 | 99.7 |
Volume density(g/cm3) | 3.0 | 3.1 | 3.3 | 3.4 | 3.6 | 3.7 | 3.81 | 3.85 |
Flexural strength(MPa) | 205 | 280 | 215.7 | 230 | 312 | 304 | 340 | 370 |
Expansion coefficient(×10-6/°C)(25-800°C) | 7.1 | 7.6 | 7.6 | 7.6 | 7.5 | 7.3 | 7.6 | 7.6 |
Thermal conductivity[w/(m.R)] | 16 | 17 | 17 | 17 | 18 | 20 | 34 | 35 |
Insulation intensity(KV/mm) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Volume resistivity(Ω.cm)20°C | ≥1014 | ≥1014 | ≥1014 | ≥1014 | ≥1014 | ≥1014 | ≥1014 | ≥1014 |
300°C | ≥1013 | ≥1013 | ≥1013 | ≥1013 | ≥1013 | ≥1012 | ≥1010 | ≥1010 |
Long-use temperature (°C) | 1350 | 1000 | 1250 | 1290 | 1390 | 1480 | 1600 | 1700 |
Moh’s hardness | 7.5 | 7.5 | 7.5 | 7.5 | 8.5 | 8.8 | 9 | 9 |
Refractoriness | 1800 | 1700 | 1800 | 1850 | 1920 | 2000 | 2030 | 2040 |