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Ultra-Pure Silicon Carbide

Property Units PureSiC® CVD SiC

SiC (CVD)

UltraClean™ Siliconized SiC

Si:SiC

UltraSiC™ Direct Sintered SiC

SiC

Grain Size

μm

0.5-4

50

5

Flexural Strength (MOR), 3-point

MPa

-

210

480

Flexural Strength (MOR), 4-point

MPa

460-616

-

-

Fracture Toughness, KIc

MPa-m1/2

3.5-4.5

4.5

4

Hardness, Knoop 100gm

GPa

2750

-

2800

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

1 x 10-6/°C

4.6

4.8

4.4

Thermal Conductivity

W/m*K

140-170

225

150

Volume Resistivity, (25°C)

ohm-cm

<0.1->105

<0.1

>105

Volume Resistivity, (500°C)

ohm-cm

-

<0.1

>103

Volume Resistivity, (1000°C)

ohm-cm

-

-

>102

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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