Negative thermal expansion material, composite material, method of manufacturing negative thermal expansion material, and component made of negative thermal expansion material

Abstract

A negative thermal expansion material including an oxide represented by one of the general formula (1) Cu2-xRxV2-yPyO7 (R includes at least one element selected from Mg, Al, Si, Ti, Cr, Mn, Fe, Co, Ni, Zn, and Sn, wherein 0≤x≤2, 0<y<2 are met), the general formula (2) Zn2-xTxP2-yAyO7 (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, and Bi, A includes at least one element selected from Al, Si, V, Ge, and Sn, wherein O≤x<2, 0≤y≤2 are met except that (x,y)=(0,0) and (0,2) are excluded), and the general formula (3) Ti2-xMxO3 (M includes at least one element selected from Mg, Al, Si, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, La, Ta, W, and Bi, wherein O≤x<2 is met) is provided.

Dependencies are inferred from the claim text.