Click on table links below to see there properties
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Ferro-Ceramic Grinding Inc. machines over 15 different materials

Alumina 99.5% Properties

Alumina 99.5% Alumina represents the most commonly utilized ceramic material in industry.  Purity levels are available from 85% through 99.99%

Alumina 99.5%

Alumina represents the most commonly utilized ceramic material in industry. Purity levels are available from 85% through 99.9%.  This is because of extremely superior abrasion, high temperature and chemical resistance.  It is electrically insulating as well.  This material has an excellent cost to part life performance record.

Applications include wear and heat resistant liners, mechanical and pump seals, nozzles, semiconductor equipment components, insulators, etc

 

  

Properties
Units
Test
Value
Physical
Chemical Formula
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C
Density, r
g/cm3
ASTM C20
3.7-3.97
Color
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ivory/white
Crystal Structure
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hexagonal
Water Absorption
% @R.T.
ASTM C373
0.5 - 3.0
Hardness
Moh's
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1.0 - 1.5
Hardness
knoop (kg/mm2)
Knoop 100g
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Mechanical
Compressive Strength
MPa @ R.T.
ASTM C773
96
Tensile Strength
MPa @ R.T.
ACMA Test #4
4.8
Modulus of Elasticity
(Young's Mod.)
GPa
ASTM C848
4.8
Flexural Strength (MOR)
MPa @ R.T.
ASTM F417
50
Poisson's Ratio, u
-
ASTM C818
--
Fracture Toughness, KIc
MPa x m1/2
Notched Beam Test
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Thermal
Max. Use Temperature
(* denotes inert atm.)
șC
No load cond.
3650 *
Thermal Shock Resistance
DT (șC)
Quenching
200 - 250
Thermal Conductivity
W/m-K @ R.T.
ASTM C408
24
Coefficient of Linear Thermal Expansion, al
mm/m-șC (~25șC through ±1000șC)
ASTM C372
8.39
Specific Heat, cp
cal/g-șC @ R.T.
ASTM C351
0.16
Electrical
Dielectric Constant
1MHz @ R.T.
ASTM D150
--
Dielectric Strength
kV/mm
ASTM D116
--
Electrical Resistivity
Wcm @ R.T.
ASTM D1829
7 x 10-3
 
 
*Although we have no reason to doubt the accuracy of the data presented, Ferro-Ceramic Grinding Inc. offers this information for comparison only, and disclaims any and all liability from error, omissions or inaccuracies, such that it does not constitute a warranty or representation for which we shall assume legal responsibility.