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Title: Alkali-lead-iron phosphate glass and associated method

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.
Inventors:
 [1];  [2];  [3]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
  3. (Santafe de Bogota, CO)
Issue Date:
OSTI Identifier:
869212
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5298329
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
alkali-lead-iron; phosphate; glass; associated; method; composition; preparation; utilizes; mixture; consisting; phosphorus; oxide; range; 40; 49; molar; percent; lead; 10; 25; iron; 17; alkali; 23; 30; resulting; melting; subsequent; solidifying; possesses; degree; durability; coefficient; thermal; expansion; metals; features; render; highly; desirable; glass-to-metal; seal; applications; associated method; lead-iron phosphate; iron phosphate; alkali oxide; thermal expansion; iron oxide; glass composition; phosphate glass; lead oxide; molar percent; metal seal; mixture consisting; highly desirable; glass resulting; glass-to-metal seal; /428/501/