Low thermal expansion materials

Details Low thermal expansion materials Low thermal expansion materials

2006-05-23

2006-05-23

Sample, David (Department: 1755)

Compositions: ceramic

Ceramic compositions

Refractory

C501S108000, C501S123000, C501S135000, C423S594120, C423S594130, C423S594160

Reexamination Certificate

active

07049257

ABSTRACT:
It is a principal object of the present invention to provide low thermal expansion materials able to answer to the needs of various uses. The present invention relates to low thermal expansion materials constituted substantially from a crystalline body represented by a compositional formula RM(QO4)3, wherein R represents at least one selected from Zr and Hf, M represents at least one selected from Mg, Ca, Sr, Ba and Ra, and Q represents at least one selected from W and Mo.

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Evans, J.S.O., et al. “Negative thermal expansion materials,” Physics B 241-243 (1998), Elsevier Science B.V. pp. 311-316.

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