Refractory ceramic compositions and method for preparing same

Patent · Tue Jul 13 00:00:00 EDT 1976

OSTI ID:862589

Morrow, Margaret K ^[1]

---

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

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