| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic which can be formed by firing at a lower temperature without practically lowering the piezoelectric characteristics. <P>SOLUTION: The piezoelectric ceramic is expressed by the general formula ABO<SB>3</SB>where the site A has lead as a main component and the site B has zirconium and titanium as main components, and it is characterised in that the electromechanical coupling factor Kr of the piezoelectric ceramic after adding 0.5 to 3.0 wt.% of a sintering auxiliary containing at least two kinds selected from among bismuth oxides, boron oxides, and zinc oxides to the total weight of the ABO<SB>3</SB>and firing at a temperature of 1,000 °C or lower, is 0.6 or larger, and the composition of respective components of the sintering auxiliaries after firing is 30 to 55 mol% of a Bi component, 0 to 25 mol% of the B component, and 45 to 70 mol% of a Zn component, respectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
