| abstract |
A thermal barrier coating material containing a compound X that is a deficient perovskite-type composite oxide of a cation-deficient type, wherein a unit lattice of the compound X has such a structure that two octahedrons each composed of six oxygen atoms and sharing one oxygen atom with each other are arranged side-by-side, the center axes of two octahedrons that respectively belong to adjacent unit lattices and are adjacent to each other are inclined with respect to each other in the compound X, multiple sets of the two octahedrons which respectively belong to adjacent unit lattices and are adjacent to each other are arranged so as to form such a periodic structure that octahedrons having different tilts are arranged alternately, and the compound X has, in the crystal structure thereof, an interface on which the periodicity of the periodic structure is altered. |