| 摘要 |
The present invention has an object to provide piezoelectric ceramics containing no lead, having a high Curie point, and further, having excellent piezoelectric properties, particularly large Qmax. The piezoelectric ceramics contain, as a main component, a bismuth layer-structured compound having (M<SUP>II</SUP><SUB>1-x</SUB>Ln<SUB>x</SUB>)Bi<SUB>4</SUB>Ti<SUB>4</SUB>O<SUB>15 </SUB>crystals (M<SUP>II </SUP>is an element selected from Sr, Ba, and Ca, Ln is an element selected from lanthanoids, and x is within a range of 0<x<=0.5) and further contain, as secondary components, at least one of Mn oxide and Co oxide, and lanthanoid, wherein the lanthanoid being the secondary component is contained within a range of 0.02 to 0.12 wt % in terms of oxide thereof.
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