RSLE-57
Zircar
It is a low expansion high strength reinforced silica matrix composite. It is entirely organic free and contains no refractory ceramic fiber. The RSLE-57 can be machined to precision tolerances with conventional tooling.
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Applications
Often used in zones where the temperatues vary rapidly, this material has a very low coefficient of expansion and provides outstanding resistance to thermal chock in an oxidized atmosphere. It is used in induction presses, and since the molten aluminum does not adhere to the RSLE-57, it is used for many applications involving this material. It also resists corrosion, is an excellent electrical insulator and has a low thermal conductivity.
Specifications
Properties & characteristics
| Temperature | 1200°C (2192°F) |
|---|---|
| Thermal Expansion Coeff., Room Temp. to 800°C (1472°F) | 0.3 x 10e6/°C |
| Composition | SiO2: 99.7%, Other oxides: 0.3, Organics: 0% |
| Density | 2.1g/cc (90pcf) |
| Porosity | 31% |
| Color | White |
| Hardness, Durometer «D» | 87 |
| Charpy impact strength | 0.8ft-lb |
| Compressive Strength | |
| At 2.7% consolidation | 48Mpa (7000psi) |
| Modulus of rupture | 30MPa (4300psi) |
| Thermal Conductivity, ASTM C-1113 - W/m°K (BT/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 10? |
| Dielectrical Strength (ASTM D-149-95) | 43volts/mil |
| Linear shrinkage, 24 hrs to 800°C (1472°F) | Length: 0.1 %, Width: 0.1%, Thickness: 0% |
| Linear shrinkage, 24 hrs to 1100°C (2012°F) | Length:4.9%, Width: 4.9%, Thickness: 7.9% |
N.B. The information presented may differ from practice. We recommend conducting tests according to the conditions of use. We accept no responsibility for results obtained by the application of this information or the safety and suitability of our products. The data is subject to certain variations without notice.
