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. An oxide represented by general formula (1):
(Bi 1-x M x )NiO 3 (1),
wherein M represents at least one metal selected from the group consisting of Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In, and
wherein x represents a numerical value of 0.02≤x≤0.15.
2. A member, comprising:
a base having a positive linear expansion coefficient at 20° C.; and
a solid body including an oxide represented by general formula (1):
(Bi 1-x M x )NiO 3 (1),
the group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and In,
wherein x represents a numerical value of 0.02≤x≤0.15,
wherein the base and the solid body are directly joined to each other, and
wherein a linear expansion coefficient at 20° C. of the member is less than that of the base.
3. The member according to claim 2 , wherein the linear expansion coefficient at 20° C. of the base is from 10x10 −6 /K to 30x10 −6 /K.
4. The member according to claim 2 , wherein a thermal conductivity κ at 0° C. of the base is from 100 W/mK to 410 W/mK.
5. The member according to claim 2 , wherein the base comprises at least one of aluminum and copper as a component.
6. A spacer member comprising the member according to claim 2 .
7. A spring comprising the member according to claim 2 .