Mullite

Color

Gray - Tan

Gas/Liquid Permeability

F134

Atm-cc/sec

None

Density

C 20-97

g/cc

2.97

Hardness

-

Mohs Scale

8

Water Absorption

C 20-97

%

0

Flexural Strength

F417-87

PSI

17,000

Tensile Strength

-

PSI

15,000

Compressive Strength

-

PSI

150,000

Elastic Modulus

C848

PSI x10⁶

25

Shear Modulus

C848

PSI x10⁶

10

Linear Coefficient of Thermal Expansion

C372-96

(@ 25°C - 100°C)x10^-6/°C

4.7

-

(@ 25°C - 300°C)x10^-6/°C

4.6

-

(@ 25°C - 600°C)x10^-6/°C

5.2

Thermal Conductivity 25°C

C408

W/m-K

260

Maximum Use Temperature
(Non Loading)

-

°C

1700

-

°F

3100

Dielectric Strength
(1/8" Thick)

D149-97A

V/mil

260

Dielectric Constant
@ 1MHz

D150-98

At 25°C

6.7

Dielectric Constant (@GHz)

D2520-95

At 25°C

6.9 (@8.9)

Dielectric Loss @ 1MHZ

D150-98

At 25°C

0.002

Dielectric Loss (@GHz)

D2520-95

At 25°C

0.003 (@8.9)

Volume Resistivity
(ohm-cm)

D257

At 25°C

>1.0E +15

-

At 300°C

4.8E +13

-

At 700°C

4.1E +09

NOTE: THE INFORMATION IN THIS DATA SHEET IS FOR DESIGN GUIDANCE ONLY. STC DOES NOT WARRANTY THIS DATA AS ABSOLUTE VALUES. FORMING METHODS AND SPECIFIC GEOMETRY COULD AFFECT PROPERTIES. SLIGHT ADJUSTMENTS CAN BE MADE TO SOME OF THE PROPERTIES TO ACCOMMODATE SPECIFIC CUSTOMER REQUIREMENTS. MOST OF THE DENSE MATERIALS IN THE TABLE ARE RESISTANT TO MECHANICAL EROSION AND CHEMICAL ATTACK. STC HAS PERFORMED TESTING IN ACCORDANCE WITH ASTM D2442 FOR CERTAIN COMPOSITIONS. PLEASE CONTACT OUR TECHNICAL STAFF FOR APPROPRIATE MATERIAL AND SPECIFIC TEST RESULTS.