| Notes | 1. Controlled by the Batch Composition
2. Measured by Pychnometer Immersion Technique
3. per ASTM C 1161-02c
|
|
Ceramic Materials & Corresponding Properties
|
Property
|
Unit
|
A998
|
A96
|
A9468
|
A9968
|
MUL6
|
PSZ
|
PSZ
|
|
Physical
|
|
|
|
|
|
|
(Yttria stabilized) |
(MgO stabilized) |
| Composition ¹ |
weight %
|
99.8 Al2O3
|
95.9 Al2O3
|
94 Al2O3
|
99 Al2O3
|
72 Al2O3
|
5.4 Y2O3
|
3.5 MgO
|
| Density ² |
g/cm3
|
3.89
|
3.67
|
2.6
|
2.9
|
2.1
|
6.1
|
6.1
|
| Porosity |
volume %
|
Impervious
|
Impervious
|
»30%
|
»25%
|
»30%
|
Impervious
|
Impervious
|
| Color |
|
Ivory
|
White
|
White
|
White
|
Tan
|
Off-White
|
Off-White
|
| Mechanical |
|
|
|
|
|
|
|
|
| Hardness |
GPa (Knoop)
|
11.1
|
11.1
|
n/a
|
n/a
|
n/a
|
13.1 HV
|
10.6 HV
|
| 4-point Bend ³ Strength (MOR) |
MPa
(ksi)
|
325
(47)
|
320
(46)
|
82
(12)
|
117
(17)
|
62
(9)
|
600
(87)
|
|
| K1C |
|
|
|
|
|
|
9.3
|
9.0
|
| Thermal |
|
|
|
|
|
|
|
|
| Maximum Service Temperature |
°C
|
1650
|
1550
|
1550
|
1550
|
1550
|
2200
|
|
Thermal Expansion
Coefficient |
°C-1
(25-700°C)
|
7.5 x 10-6
|
7.2 x 10-6
|
»7 x 10-6
|
»7 x 10-6
|
»5 x 10-6
|
11.2 x 10-6
|
|
| Thermal Conductivity (20°C) |
W/m·°K (Btu·in/ft2 ·hr·°F)
|
35
(242)
|
24
(167)
|
»15
(104)
|
»24
(166)
|
»4
(28)
|
»2
(14)
|
|
| Electrical |
|
|
|
|
|
|
|
|
| Dielectric Strength |
Volts/mil
|
200
|
210
|
n/a
|
n/a
|
n/a
|
51
|
|
| Dielectric Constant |
@1MHz @ 20°C
|
10.0
|
9.3
|
n/a
|
n/a
|
n/a
|
28.0
|
|
| Volume Resistivity |
Ohm·cm @ 25°C
Ohm·cm @ 300°C
Ohm·cm @ 500°C
|
1014
2.5x1011
5.5x108
|
>1014
1.4x1010
5.8x107
|
n/a
n/a
n/a
|
n/a
n/a
n/a
|
n/a
n/a
n/a
|
>1013
n/a
4.8x103
|
|
Other ceramic materials are available for production that are not included in the chart above. Properties not recorded are in testing.
|
| |
© 2010 Ceramco, Inc., all rights
reserved.
P.O. Box 300, 1467 East Main Street, Center Conway, NH 03813
Tel: (603) 447-2090 | Fax: (603) 447-3906
|
