Refractory ceramic compositions and method for preparing same

Patent · 13 July 1976

OSTI ID:862589

Morrow, Margaret K ^[1]

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1. Oak Ridge, TN

This invention relates to ceramic compositions of tungsten and tantalum oxides including 0 to 33 1/3 mole percent of a metal oxide such as hafnia. These ceramics are characterized by melting points greater than about 1400.degree.C and selectively controlled coefficients of thermal expansion of essentially zero to a negative value in the temperature range of 20.degree. to 1000.degree.C.

• Research Organization: UNION CARBIDE CORP
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3969123
• OSTI ID: 862589
• Country of Publication: United States
• Language: English

Related Subjects

/501/
1000
1400
20
33
ceramic
ceramic composition
ceramic compositions
ceramics
characterized
coefficients
compositions
controlled
degree
essentially
expansion
hafnia
including
melting
metal
metal oxide
method
mole
mole percent
negative
oxide
oxides
percent
preparing
range
refractory
refractory ceramic
relates
selectively
selectively control
selectively controlled
tantalum
tantalum oxide
temperature
temperature range
thermal
thermal expansion
tungsten
value
zero