Burntstone
CERAMIC LIMITED
Technical Data
April 2000
SG70-95
Structural Ceramic Sheet
Description
SG70-95 is a non-asbestos ceramic refractory reinforced with continuous fibres to increase the toughness, structural reliability and overall performance of the ceramic composite. Supplied in sheets, boards, cylinders and other geometric shapes, SG70-95 exhibits non-brittle behaviour and can withstand extreme thermal shock and cycling within its specified temperature range. Chemically inert, unaffected by moisture and non-wetting to non--ferrous metals, SG70-95 is machinable with standard tools. Thermally and electrically insulating, SG70-95 is an excellent material choice for a variety of structural applications. It is widely used as a replacement for dense asbestos products, silica/mica/phosphate based materials, vacuum formed fibreboard, monolithic ceramics and reinforced plastics where superior structural performance is required.
Chemical Properties
| Al2O3 | 70% | SiO2 | 20% |
Other metal oxides | 10% |
Physical Properties
| Maximum Service Temperature | 745°C | continuous service |
| 1260°C | short term service |
| Density (kg/m3) | 1510 | |
| Modulus of Rupture (MPa) | 29 | |
| Compressive strength (MPa) | 73 | |
| Linear change (%) after 24h at | |
| 745°C | -0.5 | |
| 1260°C | -1 | |
| Electrical resistivity (Ohm.cm) | | 64x1010 |
| Dielectric Constant | | 5.3 |
| Dielectric Strength (V/mm) | | 3660 |
Thermal conductivity
| Temperature °C | W/mK |
| 205 | 0.43 |
| 425 | 0.45 |
| 625 | 0.46 |
| 1000 | 0.47 |
Applications
| – Hot work surfaces |
– Induction coil liners and supports |
| – Kiln furniture |
– Electrical insulation |
Availability
| Boards | Cylinders |
|---|
| – 1220 x 1220mm in thicknesses of | – up to 915mm Inner Diameter |
| – 6, 9.5, 12.5, 19, 25 | – 3 to 13mm Wall Thickness |
| 38, 50, 75, 100mm | – up to 2150mm Length |
| – other shapes and sizes on request. |
The information and data herein are offered solely for your consideration and guidance and are not to be construed as a warranty or specification. Nothing contained herein is to be interpreted as authorisation to practice a patented invention without a licence.
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BURNTSTONE CERAMIC LIMITED 19 Redgates, Walkington, Beverley HU17 8TS
Tel: +44 (0) 1482 868706
E-mail: sales@burntstone.co.uk Home page: http://www.burntstone.co.uk
Registered in England 2113851 |
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| Website Version 4.6 - Last revision date: 12 March 2008
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