| 摘要 |
PROBLEM TO BE SOLVED: To provide a sintered compact of a bismuth layered compound, which has large piezoelectric characteristics and low dispersion in the piezoelectric characteristics. SOLUTION: The sintered compact 1 of the bismuth layered compound, containing, as main crystal 2, flat grains 2 of the bismuth layered compound, expressed by general formula: (Bi2O2)2+(Am-1BmO3m+1)2- (where, A is at least one selected from the group of alkali metals, alkaline earth metals and lead and B is at least one selected from the group of metals of groups 4a and 5a) and having a face A perpendicular to the orientation direction oriented to crystal face perpendicular to face c, is produced. In the sintered compact 1 of the bismuth layered compound, the ratio of grains of the crystal 2, present at the face A perpendicular to the orientation direction and each having a major diameter d satisfying formula: 0.5d<=d<=2d (d is an average major diameter of the main crystal 2), is >=80%, based on the grains of the main crystal 2 present at the face A perpendicular to the orientation direction. |
