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Silicates

Silicates Overview

Family Overview

Silicates, sometimes referred to as traditional ceramics, were originally developed for non-technical applications. CoorsTek silicates are still employed as good, cost-effective technical components for applicatiosns such as electrical insulators and chemical labware.

  • Traditional
  • Electrical resistivity
  • Thermal shock resistance

Ceramics Expertise

CoorsTek helped pioneer the use of engineered ceramics in technical applications, including our robust porcelain labware  over the past century. We worked with our customers to develop technical ceramics, driven by real world applications. 

Property Units Porcelain

Porcelain

Steatite

Mg Silicate

Cordierite

Al Silicate

Mullite

Al Silicate

Flexural Strength MOR, (20°C)

MPa

130 

40-160

55-100

45-170

Compressive Strength, (20°C)

MPa

590

-

-

550 (80)

Fracture Toughness, KIc

MPa m1/2

2

1.0-2.0

-

2

Hardness, Rockwell 45N

R45N

60

57

-

70

Hardness, Knoop 1000gm

GPa

5.9 

-

-

7.4

Maximum Use Temperature

°C

1400

1200

1200

1500-1700

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

1 x 10-6/°C

4.9

7.0-10.0

3.0-3.5

2.8-6.7

Thermal Shock Resistance, (∆T)

°C

-

100

200-350

200-400

Thermal Conductivity, (20°C)

W/m K

5.0

1.5-3.0

1.2-1.8

0.9-3.5

Dielectric Strength, (6.35mm)

ac-kV/mm

-

-

10

9.8-10.0

Dielectric Constant, (1 MHz)

25°C

5.9

-

-

6

Volume Resistivity, (25°C)

ohm-cm

-

1013

109-1012

1010->1014

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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