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Applications //
This remarkable material was designed for use as a high strength insulator in induction hot press applications. RSLE-57 also exhibits exceptional non-wetting properties when used in contact with molten aluminum making it useful in numerous molten aluminum contact applications. It has a low thermal conductivity, an excellent electrical insulation and an excellent resistance to corrosion (from molten metal and glass). Exhibits a very low coefficient of expansion. Provides remarkable resistance to the thermal shock up to 1200°C (2192°F).
Properties & characteristics //
| |
| Thermal Expansion Coeff. |
|
| Room Temp. to 800°C (1472°F) |
0.3 x 10-6/°C |
| Nominal Composition, wt % |
|
| SiO2 |
99.7 |
| Other Oxides |
< 0.3 |
| Organics |
0 |
| Density, g/cc(pcf) |
2.1 (90) |
| Porosity, % |
31 |
| Color |
White |
| Hardness, Durometer «D» |
87 |
| Charpy impact Strength, ft-lb |
0.8 |
| Compressive Strength**, MPa (psi) |
|
| At 2.7% consolidation |
48 (7000) |
| Modulus of Rupture**, MPa (psi) |
30 (4300) |
| Thermal Conductivity** ASTM C-1113 |
|
| W/m°K (BTU/hr ft2 °F/in) |
|
| 200°C (392°F) |
0.55 (3.8) |
| 400°C (752°F) |
0.64 (4.4) |
| 600°C (1112°F) |
0.61 (4.2) |
| 800°C (1472°F) |
0.67 (4.6) |
| 1000°C (1832°F) |
0.75 (5.2) |
| Volume Resistivity, ohm-cm ASTM D-257-93 |
7.5 x 109 |
| Dielectrical Strength, volts/mil |
|
| ASTM D-149-95 |
43 |
| Linear Shrinkage, %*** |
Length Width Thickness |
| 24 hrs to 800°C (1472°F) |
0.1 0.1 0 |
| 24 hrs to 1100°C (2012°F) |
4.9 4.9 7.9 |
* Maximum use temperature is dependent on variables such as stresses, both thermal and mechanical, and the chemical environment that the material experiences.
** Properties expressed parallel to thickness.
*** Properties expressed perpendicular to thickness.
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