| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric porcelain composition having an excellent electromechanical coupling factor by using an inexpensive material not containing a lead oxide component. <P>SOLUTION: The composition has a chemical formula [Bi<SB>a</SB>(Na<SB>1-X</SB>K<SB>X</SB>)<SB>1-a</SB>][Ti<SB>1-y</SB>(M<SB>1-b</SB>Nb<SB>b</SB>)<SB>y</SB>]O<SB>3</SB>, wherein element M and the compositional ranges of x, y, a, and b are selected. <P>COPYRIGHT: (C)2004,JPO |
