| 摘要 |
<p>Disclosed is a piezoelectric ceramic which is characterized by containing [K 1-x Na x ] 1-y Li y [Nb 1-z-w Ta z Sb w ]O 3 (wherein x, y, z and w each represents a molar ratio and satisfies 0 ‰¤ x ‰¤ 1, 0 ‰¤ y ‰¤ 1, 0 ‰¤ z ‰¤ 1, 0 ‰¤ w ‰¤ 1) as the main phase and K 3 Nb 3 O 6 Si 2 O 7 as a sub-phase, while containing, as an additive, a Cu compound in an amount of 0.02-5.0 mol in terms of CuO relative to 100 mol of the main phase.</p> |
