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Products/Technical Ceramic Products:

Alumina - Typical Characteristics

92 % Al2O3

High Hardness
Good Wear Resistance
Very Low Electrical Conductivity
High Corrosion Resistance
High Oxidation Resistance
Low Tensile Strength

95 % Al2O3

High Hardness
Resistance to Slag attack
High Bending Strength
Resistance to Dynamic Wear
Resistance to Abrasion

99.8 % Al2O3

Excellent Thermal Stability
Good Corrosion Resistance
Good Thermal Shock Resistance
Resistance to Acid and Basic Slag
Good Hardness and Wear Resistance
High Durability
Low Dielectric Constant and Loss Tangent
Inert to hydrogen, carbon and refractory metals under most severe conditions like non-toxic, non-reactive, non-magnetic & non-aging.

Property Details

	Particulars	Units	Al₂O₃ 92%	Al₂O₃ 95%	Al₂O₃ 99.80%
Physical	Density	gm / cc	3.72	≥ 3.76	≥ 3.90
	Porosity	%	Nil	Nil	Nil
	Colour		White	White / Pink	Ivory
Mechanical	Flexural Strength	Kg / Cm²	3200	3250	2800 - 3000
	Compressive Strength	Kg / Cm²	20000	21400	25500
	Hardness (Vickers)	HV10	1250-1300	1500	1550 - 1600
Thermal	Thermal Shock Resistance	Deg C	160	160 - 180	200
	Thermal Conductivity	W/m Deg C	24	24	24 - 26
	Co-efficient of Thermal Expansion	x 10^-6 / Deg C	7.6	8.8	8.4
	Maximum Use Temperature	Deg C	1400	1450	1800
Electrical	Dielectric Constant	MHz	8.6	9.1	9.8
	Dielectric Strength	KV / mm	25	25	25
	Electrical Resistivity, 25 Deg C	Ω-Cm	≥ 10¹³	≥ 10¹³	10¹⁴

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