Publication number: 20220274884
Abstract: Provided is a compact of a powder satisfying requirements 1 to 3. Requirement 1: |dA(T)/dT| of the powder is 10 ppm/° C. or more at least at ?200 to 1,200° C., where A is (a lattice constant of a-axis)/(a lattice constant of c-axis) obtained from X-ray diffractometry. Requirement 2: the powder contains at least one metal or semimetal element, and the element is composed of only an element selected from the group consisting of Li, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ag, Cd, In, Sn, Sb, Te, Cs, Ba, Hf, Ta, W, Re, Au, Hg, Tl, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. Requirement 3: the linear thermal expansion coefficient at ?200 to 1,200° C. of the compact is negative at least at one temperature.
Type:
Application
Filed:
June 22, 2020
Publication date:
September 1, 2022
Inventors:
Atsunori DOI, Satoshi SHIMANO