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High Silica Glass Marble
High silica glass marbles belong to Na2O-B2O3-SiO2 glass. They are used to make high silica fiber, which can be used for the thermal insulation of spacecrafts, ablative materials, high temperature-proof materials and high temperature-resistant insulation materials etc.
Chemical Makeup:
Make up | SiO2 | Al2O3 | B2O3 | Na2O | Fe2O3 |
Content (w%) | 67.5+1.0 | 1.0+0.3 | 23.0+1.0 | 8.0+0.5 | <0.2 |
Appearance Quality:
1. The diameter of the glass is 16.0±0.7 mm. Glass marbles shouldn't be any out of round or misshapen macroscopically. The largest radius minus the shortest radius is not over 1.0mm.
2. There should not be any big macula, over 5mm chapped surface, or other impurity such as oil stains, alkali powder, rust etc.
3. Its free of stones, surface contamination or excessive air bubbles.
Rate of Qualification: >98%