Alkali-lead-iron phosphate glass and associated method

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869212

Boatner, Lynn A ^[1]; Sales, Brian C ^[2]; Franco, Sofia C. S. ^[3]

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1. Oak Ridge, TN
2. Knoxville, TN
3. Santafe de Bogota, CO

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5298329
• OSTI ID: 869212
• Country of Publication: United States
• Language: English

Related Subjects

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/