| 摘要 |
PROBLEM TO BE SOLVED: To obtain a dielectric porcelain having a temperature coefficient capable of compensating temperature coefficient of a piezoelectric resonator and having high folding endurance. SOLUTION: This dielectric porcelain has main crystalline particles 1 comprising perovskite type complex oxide containing at least Pb, Mg, Nb and Ti as metal elements and crystalline particles 2 comprising a bismuth layered compound which is present in grain boundary of the main crystalline particles 1. The bismuth layered compound is preferably at least one kind of compound among SrBi4Ti4O15, CaBi4Ti4O15 and PbBi4Ti4O15. |
