The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2023
Filed:
Oct. 05, 2017
Applicant:
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Inventor:
Masanori Ikari, Annaka, JP;
Assignee:
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/443 (2006.01); C04B 35/626 (2006.01); C04B 35/645 (2006.01); G02B 1/02 (2006.01);
U.S. Cl.
CPC ...
C04B 35/443 (2013.01); C04B 35/6261 (2013.01); C04B 35/6455 (2013.01); G02B 1/02 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/5409 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/5454 (2013.01); C04B 2235/604 (2013.01); C04B 2235/658 (2013.01); C04B 2235/72 (2013.01); C04B 2235/9653 (2013.01);
Abstract
Provided is a transparent spinel sintered body which is formed from an Mg—Al spinel powder having an Al/Mg ratio of from 1.97 to 2.03 or a mixed powder of an Mg oxide and an Al oxide, and wherein the total content of metal impurities excluding Al and Mg is less than 100 ppm. A sample of this transparent spinel sintered body having a thickness of 3 mm has a total light transmittance of 80% or more in the thickness direction for the wavelength range of from 190 nm to 400 nm; and this transparent spinel sintered body is usable as a medium that transmits light from an ultraviolet light emitting element.