| 摘要 |
Provided are a piezoelectric ceramic and a piezoelectric device having a larger piezoelectric strain constant and capable of being fired at a lower temperature. A main component of PbA[(Mg1/3Nb2/3)a(Zn1/3Nb2/3)bTicZrd]O3 (a+b+c+d=1, 0.99<=A<=1.01, 0.15<=a+b<=0.5, 0.05<=b<=0.25, 0.2<=c<=0.5, 0.15<=d<=0.6) and 0.01 mass % to 0.8 mass % inclusive of at least one kind selected from the group consisting of Fe, Co, Ni and Cu in the form of oxide per 1 mol of the main component as a first sub-component are comprised. Thereby, a larger piezoelectric strain constant can be obtained, and a firing temperature can be reduced. In the main component, a part of Pb may be replaced with at least one kind selected from the group consisting of Ca, Sr and Ba. Further, as a second sub-component, 0.05 mass % to 1.0 mass % inclusive of at least one kind selected from the group consisting of Sb, Nb and Ta in the form of oxide per 1 mol of the main component may be comprised.
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