| 摘要 |
<p>The present invention relates to a piezoelectric ceramic which comprises perovskite metal oxide including titanate barium, and Mn. According to the present invention, when a surface according to the remnant polarization direction is X-ray-diffraction-analyzed at room temperature, the diffraction intensity of a surface (002) to a surface (200) is greater than or equal to 1.0, the diffraction peak of the surface (002) has less than or equal to 1.2°of the half-width, and lattice constants of axes a and c satisfy 1.004<=c/a<=1.010.</p> |
