Process for making a cellulated vitreous material
US4198224A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1978 |
| Grant date | Apr 15, 1980 |
| Priority date | — |
| Expiry date | Aug 16, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Where a formulated glass cullet is utilized as a portion of the pulverulent batch material, the cellular material is prepared by first grinding the glass cullet in a ball mill with a cellulating agent such as carbon black until the pulverulent material attains an average particle size of about 4 or 5 microns. The pulverulent batch containing the glass cullet and cellulating agent is then sintered at a sintering temperature for a sufficient period of time to permit the glass cullet material to soften and coalesce and increase in density without, however, cellulating the glass batch. The sintering process is then interrupted and the sintered material may be cooled and crushed to a size that passes through a United States 10 mesh screen. The crushed and screened sintered material is then positioned in a suitable mold and subjected to a cellulating temperature of between about 1600.degree. F. (870.degree. C.) and 1650.degree. F. (899.degree. C.) for a sufficient period of time for the cellulating agent to react and cellulate the sintered batch and form a cellulated material. The resultant cellulated material is then quenched to terminate the cellulating process, removed from the mold a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.