alumina substrate

Ceramic Properties Standard Properties*Units99% Al203Densitygm/cc3.80Crystal SizeAverageMICRONS6Water Absorption%0Gas Permeability0ColorIVORYFlexural Strength (MOR)20° CMPa (psi x 103)379 (55)Elastic Modulus20° CGPa (psi x 106)370 (54)Poisson's Ratio20° C0.22Compressive Strength20° CMPa (psi x 103)2600 (377)HardnessGPa (kg/mm2)14.1 (1440)R45N83Tensile Strength25° CMPa (psi x 103)262 (38)Fracture ToughnessK(I c)Mpa m1/24 - 5Thermal Conductivity20° CW/m °K30.0Coefficient of Thermal Expansion25-1000° C1X 10-6/°C8.2Specific Heat100° CJ/kg*K880Thermal Shock Resistance Tc°C200Maximum Use Temperature°C1750Dielectric Strengthac-kV/mm (ac V/mil)8.7 (220)Dielectric Constant1 MHz25° C9.7Volume Resistivity25° Cohm-cm> 1014500° Cohm-cm2 x 10101000° Cohm-cm2 x 106Impingement0.47 physical analysis sheet for 95%Al2O3Densityg/cm33.6Substance CharacteristicWater AbsorptionOSinter Temperature1710Physical CharacteristicHardnessHV≥12Bending StrengthMpa≥310compressive strengthKgf/cm225000Elastic ModulusGPa300fracture toughnessMap.m3/23 to 4Max Using Temperature1450Thermal CharacteristicCoefficient of Thermal Expansion1X 10-6/°C8heat-resistant TemperatureT()220Thermal ConductivityW/m.k(25-300)2420>1012Volume Resistance100>.cm1012-1013Electric Characteristic300>1010Dielectric StrengthKV/mm18Dielectric Constant100MHz(E)9.5