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:
Jan. 19, 1982
Filed:
Oct. 09, 1980
Andrew Herczog, Hammondsport, NY (US);
Corning Glass Works, Corning, NY (US);
Abstract
This invention is directed to the production of sealing glasses capable of forming strong, non-porous seals with glasses containing at least 10% by weight of an alkali metal oxide such as are used in the fabrication of the glass membranes utilized in sodium-sulfur and potassium-sulfur batteries. The inventive seals require an interdiffusion of ions to occur between the sealing glass and the glass being sealed. Glasses presently employed as membrane glasses for such batteries have base compositions within the Na.sub.2 O-B.sub.2 O.sub.3 and K.sub.2 O-B.sub.2 O.sub.3 systems. The inventive sealing glasses consist essentially, expressed in mole percent on the oxide basis, of about 3-30% R.sub.2 O and 60-95% B.sub.2 O.sub.3, wherein R.sub.2 O consists of K.sub.2 O, Rb.sub.2 O, Cs.sub.2 O, and mixtures thereof and, optionally, Al.sub.2 O.sub.3 is substituted for up to one-half the B.sub.2 O.sub.3 content on a molar basis. The seals contemplate the exchange of large alkali metal ions from the sealing glass for the smaller alkali metal ions of the membrane glass.