Alumina Shaft

Alumina Shaft,mainly used in the production of industrial ceramics,such as textiles and ceramics.99 porcelain is mainly used in the production casing Tancifaxin take over the seat of electronic products such as ceramics plates.Alumina Shaft specificationsAL2O399%MgO0.8%Na2O<0.15%SiO2<0.018%Y2O3<0.02%Fe2O3<0.02%TiO2<0.006%CaO<0.005% Specifications of Alumina ShaftItemsTest conditionUnitAverage grain sizeµm3 - 5Densityg/cm3≥3.85Water absorption%0Hardness (Vickers)HV0.5≥1900Flexual strengthDistance between bending points 80mmMPa≥340Compressing strengthMPa3600Linear thermal expanding coefficient20-500℃1x106 mm/℃6.5 – 7.520-800℃6.5 - 8.0Thermal conductivity20℃W/(m.K)≥24Dielectric strengthKV/mm≥12Volume resistivity300℃Ω.cm≥1011Dielectric constant1MHz9.3-10.6Dielectric loss1MHz3x10-4Thermal shock resistance850℃times≥7 



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