Anti-thermally-expansive resin and anti-thermally-expansive metal

摘要

Provided are resin-based and metal-based anti-thermally-expansive members each having small thermal expansion. More specifically, provided are an anti-thermally-expansive resin and an anti-thermally-expansive metal, each including a resin or a metal having a positive linear expansion coefficient at 20°C and a solid particle dispersed in the resin or metal, in which the solid particle includes at least an oxide represented by the following general formula (1): (Bi 1-x M x ) NiO 3 (1), where M represents at least one metal selected from the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In; and x represents a numerical value of 0.02‰¤x‰¤0.15.