High temperature insulation utilizing zirconia-hafnia

Details High temperature insulation utilizing zirconia-hafnia High temperature insulation utilizing zirconia-hafnia

2006-09-19

2006-09-19

McNeil, Jennifer C. (Department: 1775)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S698000

Reexamination Certificate

active

07108925

ABSTRACT:
A ceramic insulating composition including monoclinic zirconia-hafnia. The zirconia-hafnia may be used as a filler powder (14) in a ceramic composition (10), or it may be used as a protective overlayer (50). The zirconia-hafnia (24) may be combined with alumina (22) to achieve a desired elastic modulus. The portion of hafnia contained in the zirconia-hafnia is selected to provide a predetermined phase transition temperature to minimize undesired phase changes during high temperature use of the material.

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patent: 2003/0035907 (2003-02-01), Campbell et al.

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