This technical information has been contributed by
Superior Technical Ceramics Corp.

Click here to find suppliers

Ceramic Materials - Alumina

Alumina

Designation
Dense
AL-95
Dense
AL-96
Dense
AL-98
Dense
AL99.5
Dense
AL99.8
% Alumina % Al2O3 95 96 98 99.5 99.8
Color   Cream White or Pink White or Pink White Cream - White
Hardness Mohs 9 9 9 9 9
Water Absorption % Imperv Imperv Imperv Imperv Imperv
Specific Gravity   3.65 3.65 3.75 3.85 3.92
Crystal Spec Micron 5-40 5-30 5-20 5-25 5-25
Tensile Strength PSI 20,000 19,000 22,000 25,000 25,000
Compressive Strength PSI 320,000 300,000 350,000 375,000 375,000
Flexural Strength PSI 41,000 45,000 43,000 45,000 45,000
Maximum Operating Temperature Under Non Loading Conditions °C 1,650 1,700 1,700 1,675 1,675
°F 3,000 3,100 3,100 3,050 3,050
Linear Coefficient of Thermal Expansion: (@ 25°C - 100 °C) x 10-6/°C 5.8 6.4 6.4 6.4 6.4
(@ 25°C - 600 °C) x 10-6/°C 7.4 7.5 7.4 7.8 8.0
Dielectric Strength (1/4" thick) VOLTS/MIL 210 220 230 230 230
Dielectric Constant At 25°C & 1 mhz 9.2 9.3 9.3 9.7 9.8
Loss Factor At 25°C & 1 mhz .004 .006 .004 .003 .003
Te Value Temp °C @ which one cm3 of material has a mega ohm of resistance 840 840 940 1000 1050

NOTE: THE INFORMATION IN THIS DATA SHEET IS FOR DESIGN GUIDANCE ONLY. FORMING METHODS AND SPECIFIC GEOMETRY COULD AFFECT PROPERTIES. SLIGHT ADJUSTMENTS CAN BE MADE TO SOME OF THE PROPERTIES TO ACCOMMODATE SPECIFIC CUSTOMER REQUIREMENTS. MOST OF THE DENSE MATERIALS IN THE TABLE ARE RESISTANT TO MECHANICAL EROSION AND CHEMICAL ATTACK.

This technical information has been contributed by
Superior Technical Ceramics Corp.

Click here to find suppliers

Home |  About Us |  Back To Technical Library |  Contact Us
Copyright © 1996-2010 JobShop.com. All Rights Reserved.
General or Technical Questions? E-mail support@JobShop.com