PIEZOELECTRIC PORCELAIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a Bi4SrTi4O15-base piezoelectric porcelain composition having a high coupling coefficient and a high mechanical quality factor. SOLUTION: This piezoelectric porcelain composition is obtained by adding >0 to 1.5 wt.% (expressed in terms of MnO2) Mn to a bismuth lamellar compound of the formula Bi4(Sr1-xMx)Ti4O15 (where M is Y or Cr and 0