Material Properties |
Units |
Steatite |
| Colour |
- |
Off White |
| Specific Gravity |
gms/cc |
2.7 |
| Water absorption |
% |
0.0 |
| Flexural strength |
Kg/cm2 |
1,300 |
| Compressive strength |
Kg/cm2 |
8,500 |
| Hardness |
HV10 |
520 |
| Coefficient of linear thermal expansion (20°C-1000°C) |
X10-6/°C |
8.5 |
| Safe operating temperature (No Load) |
°C |
1,050 |
| Dielectric strength (20°C)5 mm thick |
KV/mm |
6 |
| Dielectric constant (20°C: 1MHZ) |
- |
6 |
| Dissipation factor 20°C: 1MHZ |
- |
0.0004 |
| Volume resistivity (20°C) |
Ohm-cm |
1013 |
| |
|
|
| Hardness Comparison |
| Material |
|
Moh Hardness |
 |
| Diamond |
|
10 |
| Sapphire |
|
9 |
| Duralox |
|
9 |
| Topaz |
|
8 |
| S t e a t i t e |
|
7.5 |
| Quartz |
|
7 |
| Tool steel |
|
6.5 |
| Silica |
|
6.0 |
| Glass |
|
5.5 |
| Carbon Steel |
|
5.5 |
| Limestone |
|
3.4 |
| Copper |
|
3 |
| Gypsum |
|
2 |
| Talc |
|
1 |
| |
|
|
| Chemical Properties |
| SiO2 |
: |
61.50% |
| MgO |
: |
27.40% |
| BaO |
: |
3.20% |
| AL2O3 |
: |
6.80% |
| Fe2O3 |
: |
0.50% |
| Na2O |
: |
0.10% |
| CaO |
: |
0.50% |
|
