Method of manufacturing a mixture for a borosilicate glass
Abstract
Abstract 1. IN A METHOD OF MANUFACTURING A GLASS MIXTURE COMPRISING THE USE OF A PULVERULENT MIXTURE OF QUARTZ POWDER AND OTHER GLASS-FORMING COMPONENTS FOR THE MANUFACTURE OF A GLASS WHICH SATISFIES THE FOLLOWING CONDITIONS EXPRESSED IN PERCENT BY WEIGHT: SIO2 30-80 R2O <13 (K2O, NA2O AND/OR LI2O B2O3 1-30 B2O3 + AL2O3 > 6 REFINING AGENT AL2O3 0-40 PREFERABLY > 10 R O REMAINDER (MGO, CAO, SRO AND/OR BAO) PERCENT >160 MICRONS 0.2 >100 MICRONS 1.5 >63 MICRONS 38 >45 MICRONS 75 >32 MICRONS 91 THE IMPROVEMENT WHEREIN QUARTZ POWDER IS USED HAVING A SELECTED PARTICLE SIZE AT LEAST 90% OF WHICH IS BETWEEN 30 AND 120 MICRONS TO ACCELERATE THE MELTING STEP, SAID QUARTZ PARTICLES BEING GRADUATED ACCORDING TO THE FOLLOWING APPROXIMATE GRAIN SIZE DISTRIBUTION:
Inventors
- 👤 J Cornelissen
- 👤 R Vreeburg
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
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