Lead zirconate titanate piezoelectric ceramic - contg. manganese and niobium, with min. temp. coefft. of mechanical quality

摘要

In a new piezoelectric ceramic (I) of the Pb zircontatetitanate system with Mn-Nb complex portion PbZrxTi1-x-z(MnaNbb)z O3, the ratio a:b is 1:4 to 1:6 with 0.42 x 0.44 and 0.75 z 0.125. (I) is produced by reaction for 1.5-2.5 h at 850-1000 degrees C and sintering for 1.5-2.5 h at 1280-1320 degrees C. Min. temp. coefft. of the mechanical quality is attained with retention of the temp. coefft. of the resonance frequency and opt. the dielectric constant.