High Purity Alumina Complex Shapes

Introduction

Tech Ceramic produces 3D shape & large size alumina components made of 99.8% alumina utilizing gel casting molding with high accuracy, high density, good wear resistance, high temperature resistance.

Features

High density
High hardness
Good wear resistance
High temperature resistance
Low thermal expansion

High corrosion resistance
High dielectric strength
Low dielectric loss
High thermal shock resistance
Good thermal conductivity

Property

Physical Properties

Composition	99.8% Al2O3
Porosity	Fully gas tight
Density （g/cm³）	3.94
Color	White

Mechanical Properties

Fracture toughness （MPa.m½）	4.5
Flexural strenght R.T. (MPa)	300
Compressive strength R.T. (MPa)	870

Thermal Properties

Thermal conductivity （W/m.K）	27
Maximum service temperature (℃)	1850
Coeficient of thermal expansion (25~1000℃ )	8.2×10^-6

Electrical Properties

Dielectrict constant (6GHz)	9.8
Dielectric loss (6GHz)	0.000025
Volume resistivity （2℃,Ω.cm）	＞10¹⁴