PIEZOELECTRIC CERAMIC COMPOSITION FOR HIGH OUTPUT KNOCKING SENSOR AND METHOD FOR MANUFACTURING THE PIEZOELECTRIC CERAMICS

摘要

The present invention relates to a piezoelectric ceramic composition for a high output knocking sensor and a manufacturing method thereof. The piezoelectric ceramic composition for a high output knocking sensor has an empirical formula of xPb(Zr_(1-y)Ti_y)O_3-(1-x)Pb(Ni_0.4Zn_0.6)_(1/3)Nb(2/3)O_3, wherein x is greater than 0.60 and less than 0.69; and y is greater than 0.500 and less than 0.525. The piezoelectric ceramic composition has high a piezoelectric strain constant and exhibits low dielectric constant, thereby being capable of having a high piezoelectric voltage constant.