Alumina Ceramic Protection Tubes is widely used In Thermal Processes.
Technical ceramics are favoured in a wide range of electronics and engineering applications for their chemical and mechanical properties. Compared to metals, they are stronger in compression, especially at higher temperatures. Ceramics have a good thermal stability (i.e. a low coefficient of thermal expansion) and good thermal and electrical resistance. They are also hard, and have excellent dimensional stability.
Properties | Units | Alumina(Al2O3) | ||||||
Porous | Mullite | Al2O3 92% | Al2O3 96% | Al2O3 99% | Al2O3 99.5% | |||
Al2O3 | ||||||||
Mechanical | Density | g/cm3 | 2.8 | 3.6 | 3.7 | 3.9 | 3.9 | |
Color | _ | _ | Tan | White | White | Ivory | Ivory | |
Water Absorption | % | 0 | 0 | 0 | 0 | 0 | ||
Vickers Hardness | Gpa | _ | 7.4 | 11 | 11.5 | 13 | 14 | |
Flexural Strength (20°C) | Mpa | 50~100 | 170 | 345 | 358 | 380 | 380 | |
Compressive Strength (20°C) | Mpa | 20~100 | 550 | 2200 | 2300 | 3000 | 3000 | |
Thermal | Thermal Conductivity (20°C) | W/m.K | 3.1 | 3.5 | 16.7 | 24.8 | 25~35 | 25~35 |
Thermal Shock Resistance (20°C) | ΔT(C) | _ | 300 | 250 | 250 | 200 | 200 | |
Maximum Use Temperature | °C | 1900 | 1700 | 1500 | 1600 | 1700 | 1700 | |
Electrical | Volume Resistivity (25°C) | Ω.cm | _ | >1014 | >1014 | >1014 | >1014 | >1014 |
