| 摘要 |
There is provided a piezoelectric ceramic having a wider operating temperature range, being capable of obtaining a larger amount of displacement, being easily sintered, and being superior in terms of low emission, environment and ecology. A piezoelectric substrate (1) includes (1-m-n){(Na 1-x-y K x Li y )(Nb 1-z Ta z )O 3 }+m{(M1)ZrO 3 }+n{M2(Nb 1-w Ta w ) 2 O 6 } as a main component. M1 and M2 each represent an alkaline-earth metal element, and the values of x, y, m and n are preferably within a range of 0.1‰¦x‰¦0.9, 0‰¦y‰¦0.1, 0<m<0.1 and 0<n‰¦0.01, respectively. Thereby, a higher Curie temperature and a larger amount of displacement can be obtained, and sintering can be more easily performed. At the time of sintering, after (M1) ZrO 3 is formed, other materials are mixed. |
