Heat-insulating layer made of complex perovskite

Details Heat-insulating layer made of complex perovskite Heat-insulating layer made of complex perovskite

2003-06-10

2008-12-23

Zimmerman, John J. (Department: 1794)

Stock material or miscellaneous articles

Composite

Of inorganic material

C416S24100B, C416S24100B, C428S702000, C428S633000, C428S649000, C427S453000

Reexamination Certificate

active

07468213

ABSTRACT:
A heat-insulating material has a melting point above 2500° C., a thermal expansion coefficient in excess of 8×10−6K−1, and a sintering temperature greater than 1400° C. It has a perovskite structure of the general formula A1+r(B′1/3+xB″2/3+y)O3+zwhereA=at least one element of the group (Ba, Sr, Ca, Be),B′=at least one element of the group (Mg, Ca, Sr, Ba, Be),B″=at least one element of the group (Ta, Nb),r, x, and z≠0, and−0.1<r, x, y, z<0.1;or of the general formula A1+r(B′1/2+xB″1/2+y)O3+zwhere A and B″ are as above andB′=at least one element of the group (Al, La, Nd, Gd, Er, Lu, Dy, Tb), and−1.0<r, x, y, z<0.1.

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The Perovskite Structure . . . by Bhalla et al. (Mat. Res. Inovat 2000).

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