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Silica Crucible
Fused silica crucible crucible is a kind of combined product,made of fused silica (quartz glass) as raw material.With small thermal expansion coefficient, good thermal shock stability, good resistance to chemical attack (in particular for acid and chlorine), resistance to erosion, big viscosity at high temperature, high strength, low thermal conductivity. Mainly used in water gap, lift tube,powder metallurgy and chemical industry.In glass industry it is used as the material barrel ect.
The features of fused quartz crucible: ultra-low expansion coefficient, high thermal stability, when 1000 °C water cooling.no cracking; long service life, especially for thermal shock; fewer impurities, high quality of burning of rare earth; fast heat conduction, low energy consumption, low weight,labor intensity reduction;wall light, non-stick powder, loss of rare-earth throw reduction. Frequency of use:more than 100 times! This item is suitable for multicrystalline silicon solar
Data | ||
Chemical | SiO2(Wt) | ≥99.8% |
Al2O3 | ≤0.12% | |
Fe2O3 | ≤0.02% | |
TiO2 | ≤0.018% | |
MgO | ≤0.004% | |
Na2O | ≤0.004% | |
CaO | ≤0.007% | |
K2O | ≤0.004% | |
Physical property | bulk density | ≥1.90-1.95g/cm3 |
apparent porosity | ≤15% | |
compression strength under normal temperature | ≥50MPa | |
bending strength under normal temperature (room temperature) | ≥25MPa | |
bending strength under high temperature | ≥28MPa | |
degree of crystallinity
| <1% | |
thermal shock resistance /time(1100℃-chill) | <![if !vml]><![endif]>≥10 times | |
thermal performance | thermal conductivity | 20C:0.64W/m°K 500C:0.81W/m°K 1090C:0.88W/m°K
|
thermal expansivity (C-1)(RT~1100C) | ≤0.9×106 | |
Max using temperature(C) | 1650 | |
