Alumina ,Alumina 95, Alumina 96, Alumina 97, Alumina 99

Alumina is a very hard and the most widely used of the ceramic materials. It is applied, where a high wear resistance, good corrosion resistance and mechanical strength are necessary. Due to its strong electric and dielectric properties it is often applied for high voltage applications and electronic products. Alumina materials differ in purity and grain size, resulting in different properties - from very fine to standard

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Electrically insulating, good corrosion resistance, very high operating temperature, functional ceramics, good mechanical characteristics, very high wear resistance, very high hardness, very high thermal shock resistance, low specific weight.

Technical Parameters

Description	Unit	Value
Material		Al₂O₃ > 99.7%
Colour		white, ivory
Density	g/cm³	3.9
Flexural Strength	MPa	390
Compressive Strength	MPa	3,900
Modulus of Elasticity (young)	GPa	390
Impact Resistance	MPa m^1/2	5.2
Weibull Modulus	m	12
Vickers Hardness	HV 0.5	2,000
Thermal Expansion Coefficient	10^-6 K^-1	5.5 - 8.4
Thermal Conductivity	W/mK	28
Thermal Shock Resistance	∆T °C	280
Maximum Use Temperature	°C	1,700
Volume Resistivity at 20 °C	Ωcm	>10¹⁵
Dielectric Strength	kV/mm	30
Dielectric Constant	ε_r	10
Dielectric Loss Angle at 20°C, 1MHz	tanδ	0.0005

These properties were measured on test samples. The values are typical material properties and may vary according to product configuration, geometry and manufacturing process.