| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a PZT-based piezoelectric material which has superior durability. <P>SOLUTION: The piezoelectric material is composed of a perovskite oxide (P) (which may contains inevitable impurities) represented by formula (P) of Pb<SB>a</SB>(Zr<SB>x</SB>, Ti<SB>y</SB>, M<SB>b-x-y</SB>)<SB>b</SB>O<SB>c</SB>, wherein a signal intensity ratio I (Pb<SP>4+</SP>)/I(Pb<SP>2+</SP>) of Pb<SP>4+</SP>and Pb<SP>2+</SP>measured by XAFS (X-ray absorption fine structure analysis) being >0 to <0.60. In the formula, M is one kind or two or more kinds of metal elements, 0<x<b, 0<y<b, 0≤b-x-y. It is standard that a:b:c=1:1:3, but those mol ratios may deviate from the standard mol ratios as long as the perovskite structure is obtained. <P>COPYRIGHT: (C)2010,JPO&INPIT |
