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The glass ceramic is the material, which combines the quality of glass and ceramic. It is transparent, with gentle yellow color and it has the resistance to high temperature till 700°C continuously and it holds the temperature shock from 20°C do 800°C .
This material is suitable as the substitute of quartz ones, into the furnaces etc.. We supply these windows in the thickness 4 mm or 5 mm . It is possible to order the thinner ones.
| Glass ceramic - physical and technical parameters : |
| Coefficient of thermal dilatation a(20-700°C) |
Ł 0,6 x 10-6 K-1 |
| Long time temperature resistance |
700 °C |
| Short time temperature resistance |
800 °C |
| Density |
2,51 g/cm3 |
| Hardness according to Mohs |
7,0 |
| Hardness according to Vickers (100 g) |
790 kg/mm2 |
| Hardness according to Vickers (200 g) |
850 kg/mm2 |
| Hardness according to Knopp (200 g) |
530 kg/mm2 |
| Modulus of elasticity E |
8 x 103 kg/mm2 |
Resistance against acids:
by 5% HCl temp. 90°C for 24 hours |
lost of 0.03 mg/cm2 |
Resistance against alkalis:
by 5% NaOH temp. 90°C for 24 hours |
lost of 0.08 mg/cm2 |
| Index of deflect n d |
1.541 |
| Abbe number νd |
56.6 |
| Transmission for thickness of materiel 5mm in range from 0.45 to 3 nm |
higher of 80% |
Dimensions:
Thickness of basic materiel
Maximal form |
4 or 5mm
790 x 850 mm |
These windows are suitable for thermo resistance ones into the furnaces till 900°C. Technical melted quartz is clear for the observe with eyes.
We recommend to choose the thickness of quartz from 1/5 to 1/10 of dimensions of plates..
This glass is very similar to PYREX one and it is suitable for thermo resistance portholes into the furnaces. This glass is very resisted to chemical materials, too.
Basic information about glass SIMAX
We supply the windows from another materials, too, as float glass, sapphire (α-Al2O3), Ge or ZnSe, in dimensions and form according to the orders.
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