Thermal expansion suppressing member and anti-thermally-expansive member
Provided are a thermal expansion suppressing member having negative thermal expansion properties and a metal-based anti-thermally-expansive member having small thermal expansion. More specifically, provided are a thermal expansion suppressing member, including at least an oxide represented by the following general formula (1), and an anti-thermally-expansive member, including a metal having a positive linear expansion coefficient at 20° C., and a solid body including at least an oxide represented by the following general formula (1), the metal and solid being joined to each other: (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.
1. A member, comprising:
a metal having a positive linear expansion coefficient at 20° C.; and
a solid body including at least an oxide represented by 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,
wherein the metal having a positive linear expansion coefficient at 20° C. and the solid body are joined to each other, and
wherein a linear expansion coefficient at 20° C. of the member is less than that of the metal.
2. A member according to claim 1 , wherein a linear expansion coefficient α at 20° C. of the metal having a positive linear expansion coefficient is 10×10 −6 /K or more and 30×10 −6 /K or less.
3. A member according to claim 1 , wherein a thermal conductivity κ at 0° C. of the metal having a positive linear expansion coefficient is 100 W/mK or more and 410 W/mK or less.
4. A member according to claim 3 , wherein the metal having a positive linear expansion coefficient comprises at least one of aluminum and copper as a component.