| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition which has low hysteresis of the generated charge amount to the pressure and an equivalent piezoelectric constant within a specified range and is suitable for detection of a pressure and its production method.SOLUTION: In the compositional formula of a ceramic composition consisting of two ingredients A and B different in charge generation tendency to an increased pressure and a decreased pressure, taking (1-y){(Na0.5, Bi0.5)0.95Ca0.05Bi4Ti4O15+0.2 wt.%Mn} as ingredient A and (y)SrBi4Ti4O15 as ingredient B, the range determining the blend ratio of the ingredients A and B is expressed by 0.05≤y≤0.4. With the ingredients A and B each in the form of a calcinated powder, the calcinated powders are blended, mixed, regulated in particle size, molded and baked according to the blend ratio of Y to form a baked body. |
