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Alumina 999

Composition

Nom 99.9% Al2O3 

Description

Ultra-pure aluminas with exhibit strong inertness and extreme hardness. Applied in severe-service conditions requiring excellent strength, high operating temperatures, and ultra-pure composition. 

Example Applications

  • Plasma Etch Components
  • Nuclear Grade Insulator Components

CoorsTek Formulations

Contact a CoorsTek expert to choose an Alumina 999 solution for your application.

Columns
Property Units Value

Flexural Strength MOR, (20°C)

MPa

350-600

Compressive Strength, (20°C)

MPa

2500-2700

Fracture Toughness, KIc

MPa m1/2

4.0-5.0

Hardness, Rockwell 45N

R45N

86

Hardness, Knoop 1000gm

GPa

14.2-14.5

Maximum Use Temperature

°C

1750-1800

Coefficient of Thermal Expansion, (25-1000°C)

1 x 10-6/°C

8.0-8.5

Thermal Shock Resistance, (∆T)

°C

200

Thermal Conductivity, (20°C)

W/m K

28.0-35.0

Dielectric Strength, (6.35mm)

ac-kV/mm

8.7

Dielectric Constant, (1 MHz)

25°C

9.8-10.0

Volume Resistivity, (25°C)

ohm-cm

1014->1015

The information provided on this chart is for general material property reference only.  The customer should recognize that exact properties of materials may vary according to product configuration but close control of values of most properties can be maintained, if specified. Nothing herein is provided, or is to be construed, as absolute engineering data or constituting a warranty or representation. Contact CoorsTek for cost-effective design, development and manufacturing assistance. CoorsTek has 300+ variations including various forming and firing processes, not all variants are represented in the present website.

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