| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic that has an excellent insulation property even for the case of a calcination under a reducing atmosphere, and to provide a production process therefor.SOLUTION: Provided is: a piezoelectric ceramic containing a main phase 1 ceramic grain having a tungsten bronze structure, and a secondary phase 2 having Mn, Si and O at the grain boundary of main phase 1 ceramic grain; and a piezoelectric ceramic made from a group of grains in which the aspect ratio of the main phase ceramic grain is 2.8 or more, and the average grain size is 3.4 μm or less as well as the deviation of grain size is 2.4 μm or less.SELECTED DRAWING: Figure 1 |
