Method of manufacturing glass bodies
US4747863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/901
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing glass bodies, in which the starting material for the glass body, being monodispersed SiO.sub.2 particles (quartz-glass powder), is used to form an open-pore green body which is subjected to a purification process in which the impurities present in the green body react with a purifying gas which is heated to a temperature in the range from 600 to 900.degree. C., after which the green body is sintered, in which a two-stage heating-purification step is used, such that in the first stage SiO.sub.2 particles are heated until they are dense-sintered, i.e. they have no more micropores, and in the second stage the homogeneous open-pore green body formed from the dense-sintered SiO.sub.2 particles is purified in a known manner in the purification gaseous atmosphere and subsequently sintered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.