Composite materials and components

Abstract

By using a novel material that exhibits negative thermal expansion, we aim to realize composite materials and components in which volume changes with respect to temperature changes are suppressed. [Solution] The composite material is Zn (general formula (2)). 2-x T x P 2-y A y O7(T contains at least one element selected from Mg, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, La, Ta, W, Bi, A contains at least one element selected from Al, Si, V, Ge, Sn, 0

Claims

1. General formula (2) Zn ２－ｘ T ｘ P ２－ｙ A ｙ O ７ A negative thermal expansion material comprising an oxide represented by (T includes at least one element selected from Mg, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, La, Ta, W, Bi, and A includes at least one element selected from Al, Si, V, Ge, Sn, satisfying 0 < x ≤ 0.8 and 0 ≤ y ≤ 2), and having a region exhibiting negative thermal expansion in the temperature range of 200 to 400 K, A positive thermal expansion material having a positive coefficient of linear expansion, A composite material containing [the specified material].

2. The negative thermal expansion material and the positive thermal expansion material are mixed together. The composite material according to claim 1.

3. A component comprising the composite material according to claim 1 or 2.

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