Aluminiumoxid-Keramikrohre (Sicherung, Stützrohr)

Ceramic tube is widely used in the industries of high temperature endurable parts, electric insulators,fire resistance materialsCeramic tube is of good chemical resistance,hardness,high temperature resistance,insulation,and widely used in the industries of machine parts,high-temperature endurable parts,electric or electric equipment insulators,fire-resistance materials.IdexUnit95% alumina99% aluminasteatite warecompositionAL2O3AL2O3≥95%AL2O3≥99%MgO SiO2densityg/cm33.63.92.8water absorption%000firing temperature°C1,6801,7001,350hardnessHV1,5001,700800flexural strength(4pt)kgf/cm23,0003,500900composition strengthkgf/cm225,00030,0004,000maximum use temperature°C1,4501,5001,100thermal expansion 0-1000°C/°C8.0*10-68.0*10-66.0*10-6thermal shock resistanceT(°C)220200200dielectric strengthKV/mm181810dielectric constant(100Mhz)(E)9.5105.8dielectric tangent(tg s)0.4*10-30.4*10-30.4*10-3 Surface finish: a) Normal polish Ra 0.9-1.0μm b) Fine polish Ra 0.4-0.6μm . c) Diamond polish Ra 0.2μm Tolerance: DIN ISO 2768-1 and DIN 40680 m