| abstract |
Disclosed is a piezoelectric ceramic composition containing at least Nb, Ta and one or more alkali metal elements. The ratio (molar ratio) among Nb, Ta and alkali metal elements is expressed as a nonstoichiometric composition ratio. This piezoelectric ceramic composition enables to obtain a piezoelectric device having excellent piezoelectric characteristics which is denser and more excellent in crystallinity than the conventional ones even when it is fired under low temperature conditions. |