PIEZOELECTRIC CERAMIC COMPOSITION AND PIEZOELECTRIC-CERAMIC ELECTRONIC PART

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A piezoelectric porcelain composition of the present invention includes a main ingredient represented by a general formula ((1 - x)(K1-a-bNaaLib)(Nb1-cTac)O3 - xM2M4O3) (provided that M2 represents Ca, Ba or Sr, M4 represents Zr, Sn or Hf, and 0.005 ≤ x ≤ 0.1, 0 ≤ a ≤ 0.9, 0 ≤ b ≤ 0.1, 0 ≤ a + b ≤ 0.9, and 0 ≤ c ≤ 0.3), and Mn is contained in an amount ranging from 2 to 15 mol, relative to 100 mol of the main ingredient, and the M4 is contained in an amount ranging from 0.1 to 5.0 mol, relative to 100 mol of the main ingredient. Preferably, Ni is contained in an amount ranging from 0.1 to 5.0 mol, relative to 100 mol of the main ingredient, and also preferably Yb, In and the like specific rare earth element is contained. A ceramic layer in a ceramic base 1 is formed of this piezoelectric porcelain composition. As a result, the degree of sintering in a reductive atmosphere is improved, and a piezoelectric porcelain composition allowing co-sintering with Ni, and a piezoelectric ceramic electronic component using the same are realized.