| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition which is lead-free and has a high apparent density, a low porosity, and a low open porosity, to provide its production method, and to provide a piezoelectric element and a dielectric element using the piezoelectric ceramic composition. <P>SOLUTION: The piezoelectric ceramic composition mainly consists of a compound represented by the formula: äLi<SB>x</SB>(K<SB>1-y</SB>Na<SB>y</SB>)<SB>1-x</SB>}(Nb<SB>1-z-w</SB>Ta<SB>z</SB>Sb<SB>w</SB>)O<SB>3</SB>(wherein x, y, z, and w are in the ranges: 0≤x≤0.2, 0≤y≤1, 0<z≤0.4, and 0<w≤0.2, respectively). This composition contains as an additive element at least one metallic element selected from specified elements. The total content of the additive is 0.0005 to 0.15 mol per mol of the compound represented by the formula. The open porosity is at most 0.4 vol.%. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
