Zero and low coefficient of thermal expansion polycrystalline oxides

Conference · Sat Jan 01 00:00:00 EST 1977

OSTI ID:7300921

Skaggs, S R

Polycrystalline oxide systems with zero to low coefficient of thermal expansion (CTE) investigated by the author include hafnia-titania and hafnia. The CTE for 30 to 40 mol percent TiO/sub 2/ in HfO/sub 2/ is less than or equal to 1 x 10/sup -6///sup 0/C, while for other compositions in the range 25 to 60 mol percent approximately 4 x 10/sup -6///sup 0/C. An investigation of the CTE of 99.999 percent HfO/sub 2/ yielded a value of 4.6 x 10/sup -6///sup 0/C from room temperature to 1000/sup 0/C. Correlation with data on HfO/sub 2/ by other investigators shows a definite relationship between the CTE and the amount of ZrO/sub 2/ present. Data are listed for comparison of the CTE of several other polycrystalline oxides investigated by Holcombe at Oak Ridge.

• Research Organization: Los Alamos Scientific Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7300921
• Report Number(s): LA-UR-77-1307; CONF-770662-1; TRN: 77-016240
• Resource Relation: Conference: International colloquium on refractory oxides for high temperature energy sources, Odeillo, France, 28 Jun 1977
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HAFNIUM OXIDES
THERMAL EXPANSION
TITANIUM OXIDES
HIGH TEMPERATURE
MEDIUM TEMPERATURE
POLYCRYSTALS
CHALCOGENIDES
CRYSTALS
EXPANSION
HAFNIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties