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:
Jul. 01, 1997
Filed:
Dec. 28, 1995
Nippon Electric Glass Co., Ltd., Otsu, JP;
Abstract
A low temperature sealing composition comprising PbO--B.sub.2 O.sub.3 --Bi.sub.2 O.sub.3 glass powder with a reduced amount of SiO.sub.2 content but with an addition of GeO.sub.2 so as to realize a lowered sealing temperature such as 400.degree.-310.degree. C. The glass powder consists essentially of 25-85 wt. % of PbO, 1-11.2 wt. % of B.sub.2 O.sub.3, 5.1-70 wt. % of Bi.sub.2 O.sub.3, 0.1-20 wt. % of GeO.sub.2, 0-5 wt. % of SiO.sub.2, 0-10 wt. % of Fe.sub.2 O.sub.3, 0-10 wt. % of CuO, 0-15 wt. % of ZnO, 0-5 wt. % of TiO.sub.2, and 0-9 wt. % of F.sub.2. The glass powder may be used by mixing with 15-55 vol. % of refractory filler powder of at least one element which is selected from the group consisting of lead titanate based ceramic powder, willemite based ceramic powder, cordierite ceramic powder, zircon based ceramic powder, tin oxide solid solution powder, and alumina powder.