公开(公告)号：US20170174560A1

公开(公告)日：2017-06-22

申请号：US15118368

申请日：2015-02-16

Applicant: TOSOH CORPORATION

Inventor： Satori HIRAI ,  Nobusuke YAMADA ,  Kazuyoshi ARAI

IPC: C03C11/00 ,  C03B19/08 ,  C03B19/06

CPC classification number: C03C11/00 ,  C03B19/066 ,  C03B19/08 ,  C03B2201/03 ,  C03C3/06 ,  C03C2201/02 ,  C03C2201/80 ,  C03C2204/06

Abstract: To provide opaque quartz glass having no water absorbing properties and being excellent in infrared light shielding properties, and a method for its production. In the production of opaque quartz glass of the present invention, a fine amorphous silica powder and a pore forming agent are mixed, then molded and heated at a predetermined temperature, to obtain opaque quartz glass wherein contained pores are closed pores, the average pore size of pores is from 5 to 20 μm, and the content density of pores is high, whereby the heat shielding properties are high.