Properties

Units

CERAM-A96

Alumina, 96%

CERAM-A996

Alumina, 99.6%

CERAM-A997

Alumina 99.8%

CERAM-AN

Aluminum Nitride

CERAM-AS

Aluminum Silicate

Fully-fired

CERAM-S

Fused Silica

CERAM-GS  Machinable Glass Ceramic

CERAM-Z

Zirconia

Partially stabilized w/Y₂O₃

Maximum Use Temperature
(no load)

°C                  (°F)

1700   (3090)

1750 (3180)

1750 (3180)

*

1150

(2100)

1100 (2000)

595

(1100)

1500

Density

gm/cc         (lb/ft³)

3.72   (232.2)

3.89

3.92

3.30

      2.5        (143)

2.2  (137.4)

2.8

     6.2            (205)

Porosity

%

0

0

0

0

2.5

0

0

0

Flexural Strength

MPa   (lb/in²x10³)

345          (50)

379       (55)

375      (54)

380          (55)

(10)

-

(11)

900     (130)

Elastic Modulus

GPa   (lb/in²x10⁶)

300      (43.5)

375    (54.4)

370      (54)

-

73

(10.6)

(10.6)

210      (30)

Shear Modulus

GPa    (lb/in²x10⁶)

124       (18)

152       (22)

-

31 

(4.5)

Compressive Strength

MPa    (lb/in²x10³)

2100 (304.5)

2600   (377)

2500   (363)

2100   (304.5)

(25)

1108 (160.7)

(32)

2500  (363)

Hardness

GPa       (Kg/mm² )

11      (1100)

14     (1400)

14.1  (1440)

11        (1100)

6

(600)

10

12.7 (1300)

Fracture Toughness K_IC

MPa•m^1/2

3.5

4

4-5

2.6

-

13

Thermal Conductivity

W/m•°K (BTU•in/ft²•hr•°F)

    25       (174)

    35       (243)

30

170

     2.9         (5.2)

1.38     (9.6)

1.32

2.2

Coefficient of Thermal Expansion

10^–6/°C

 (10^–6/°F)

8.2

(4.6)

8.4

(4.7)

8.2

8.2

(4.6)

2.9

0.55 

(0.31)

10.48

10.3

(5.2)

Specific Heat

J/Kg•°K (Btu/lb•°F)

880

(0.21)

880

(0.21)

880

740

(0.18)

740

(0.18)

400

Dielectric Strength

volts/mil

    365

 420

220

425

100

750

420

228

Dielectric Constant

@ 1 MHz

9.0

9.8

9.7

8.9

5.3

3.82

6.8

29.0

Dissipation Factor

@ 1 mHz

0.0011

.00002

-

0.00001

.053

0.00002

0.0017

Volume Resistivity

ohm•cm @25°C

>10¹⁴

>10¹⁴

>10¹⁴

10¹⁴

>10¹⁰

10¹²

>10¹³