Alkali-lead-iron phosphate glass and associated method

Patent · Tue Mar 29 00:00:00 EST 1994

OSTI ID:5078016

Boatner, L A; Sales, B C; Franco, S C.S.

A glass composition and method of preparation utilizes a mixture consisting of phosphorus oxide within the range of about 40 to 49 molar percent, lead oxide within the range of about 10 to 25 molar percent, iron oxide within the range of about 10 to 17 molar percent and an alkali oxide within the range of about 23 to 30 molar percent. The glass resulting from the melting and subsequent solidifying of the mixture possesses a high degree of durability and a coefficient of thermal expansion as high as that of any of a number of metals. Such features render this glass highly desirable in glass-to-metal seal applications. 6 figures.

• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
• Patent Number(s): US 5298329; A
• Application Number: PPN: US 7-875224
• OSTI ID: 5078016
• Resource Relation: Patent File Date: 28 Apr 1992
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
GLASS
CHEMICAL COMPOSITION
THERMAL EXPANSION
CONCENTRATION RATIO
METALS
SEALING MATERIALS
ELEMENTS
EXPANSION
MATERIALS
400201* - Chemical & Physicochemical Properties
360606 - Other Materials- Physical Properties- (1992-)