公开(公告)号：US5547482A

公开(公告)日：1996-08-20

申请号：US270423

申请日：1994-07-05

Applicant: Julie B. Chalk ,  Jonathan C. Rowe ,  Paul M. Schermerhorn ,  Robert D. Shoup

Inventor： Julie B. Chalk ,  Jonathan C. Rowe ,  Paul M. Schermerhorn ,  Robert D. Shoup

IPC: C03B8/00 ,  C03B8/02 ,  C03B19/00 ,  C03B19/06 ,  C03B19/12 ,  C03B20/00 ,  C03B32/00 ,  C03C3/06

CPC classification number: C03C3/06 ,  C03B19/06 ,  C03B19/066 ,  C03B19/12 ,  C03B20/00 ,  C03B32/00 ,  C03B2201/08 ,  C03B2201/20 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34 ,  C03B2201/40 ,  C03B2201/42 ,  C03B2201/50 ,  C03B2201/54 ,  C03C2201/06 ,  C03C2201/42 ,  C03C2203/26 ,  C03C2203/27 ,  C03C2203/50 ,  Y02P40/57

Abstract: This invention is directed to the production of essentially defect-free high purity fused silica glass articles, the method comprising the following steps: (a) forming a green body from silica particulates or a porous body of amorphous silica; (b) sintering said body in a chamber by raising the temperature of the chamber to above 1720.degree. C., while purging the chamber with helium or applying a vacuum to the chamber; and (c) consolidating the sintered body in a chamber by raising the temperature within the chamber to at least 1750.degree. C., introducing an inert gas into the chamber at a pressure less than about 6.9 MPa (1000 psig), and cooling the chamber while maintaining the pressurized atmosphere to a temperature at least below the annealing point of the glass. In the most preferred practice, a green body of silica particulates will be prepared via a sol-gel process.

Abstract translation: 本发明涉及生产基本上无缺陷的高纯度熔融石英玻璃制品，该方法包括以下步骤：（a）由二氧化硅微粒或无定形二氧化硅的多孔体形成生坯; （b）通过将腔室的温度升高到1720℃以上，同时用氦气吹扫腔室或向室内施加真空来在室内烧结所述主体; 和（c）通过将室内的温度升高至至少1750℃将烧结体固化在室中，在小于约6.9MPa（1000psig）的压力下将惰性气体引入室中，并冷却室 同时将加压气氛保持在至少低于玻璃退火点的温度。 在最优选的实践中，将通过溶胶 - 凝胶法制备生物体的二氧化硅颗粒。