PURPOSE: Provided is a piezoelectric ceramic composition which has a large signal piezoelectric constant, a large electromechanical coupling factor and a small mechanical quality coefficient. CONSTITUTION: The piezoelectric ceramic composition has a composition represented by xPb(Mg1/2W1/2)O3-yPb(Ni1/3Nb2/3)O3-zPbTiO3-wPbZrO3, wherein x, y, z and w are a molar ratio; 0=x=0.05; 0.30=y=0.55; 0.35=z=0.45; 0.10=w=0.25; and x+y+z+w = 1. Preferably the piezoelectric ceramic composition has a composition represented by xPb(Mg1/2W1/2)O3-yPb(Ni1/3Nb2/3)O3-zPbTiO3-wPbZrO3 + uY2O3, wherein x, y, z and w are a molar ratio; 0=x=0.05; 0.30=y=0.55; 0.35=z=0.45; 0.10=w=0.25; x+y+z+w = 1; and u satisfies the relation represented by 0=u (wt%)=0.5 based on the total weight of the composition.
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机译：目的：提供一种压电陶瓷组合物，其具有大的信号压电常数，大的机电耦合系数和小的机械品质系数。组成：压电陶瓷组合物具有以xPb（Mg1 / 2W1 / 2）O3-yPb（Ni1 / 3Nb2 / 3）O3-zPbTiO3-wPbZrO3表示的组成，其中x，y，z和w为摩尔比; 0 <= x <= 0.05; 0.30 <= y <= 0.55; 0.35 <= z <= 0.45; 0.10 <= w <= 0.25;压电陶瓷组合物优选具有由xPb（Mg1 / 2W1 / 2）O3-yPb（Ni1 / 3Nb2 / 3）O3-zPbTiO3-wPbZrO3 + uY2O3表示的组成。 y，z和w是摩尔比; 0 <= x <= 0.05; 0.30 <= y <= 0.55; 0.35 <= z <= 0.45; 0.10 <= w <= 0.25; x + y + z + w = 1; u满足基于组合物总重量的0≤u（wt％）≤0.5的关系。
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