Pyrophyllite Data

Property

Units

State

Unfired

Good thermal shock properties

Ceramit 10

Fired 800-1000°C

Good thermal shock properties

Ceramit 14

Fired 1300°C

Excellent electrical properties

Density

g/cm³

–

–

2.4-2.55

Colour

Grey

Pink to Dark Brown

Hardness

Mohs

2.5

5

7

Porosity

%

1.8-2

2.66 ± 0.02

0.01-Nil

Softening Temperature

°C

–

1600°C

Max.Continuous Temp.

°C

–

1100°C

Coefficient of linear thermal Expansion

X 10^-6

^{20 – 600°C}

–

2.9-3.5

6-8

Thermal Conductivity

W/mK

1.5

1.9

Compressive strength

KN/cm²

–

10.3

15.16

Cross bending strength

1.13 -1.58

3.37

8.27

Tensile strength

1.03

2.34

3.44

Volume resistivity

20

300

500 MΩ/cm³

700

900

–

–

–

–

–

Same

As

Ceramit14

When

dry

10¹⁴

10⁹

10⁶

10⁵

10⁴

Dielectric Strength

Kv (Using a 5mm thick test piece)

–

–

24

Power Factor

@1mHz tand x 10⁴

–

–

0.1 – 0.13

Permitivity

–

–

5.2

T E Value

°C

–

–

700

Loss Factor

1000K/Hz

–

–

0.05