Patent · US Expired

Method for producing articles of high-purity synthetic quartz glass

US4572729A · kind A · utility

9Cited by

3References

3Claims

0Family size

Assignee

Wacker-Chemitronic Gesellschaft fur Elektronik Grundstoffe mbH · DE

Inventors

Winfried Lang · Burghausen, DE
Rudolf Griesshammer · Altötting, DE
Michael Schwab · Neuötting, DE
Werner Zulehner · Burghausen, DE

Key dates

Filing date	Dec 30, 1983
Grant date	Feb 25, 1986
Priority date	—
Expiry date	Dec 30, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S65/08
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method is described according to which articles of quartz glass, particrly quartz crucibles for use in crucible pulling according to Czochralski of high-purity synthetic quartz glass can be produced. High-purity silicon tetrachloride is hydrolized with water. The hydrolysis product is separated, dried, shaped, sintered and superficially fused.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.