| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide: an all solid-solution type piezoelectric single crystal ingot which is composed of a relaxer having a compositional formula of Pb(Mg,Nb)O<SB>3</SB>and lead titanate having a composition of PbTiO<SB>3</SB>, wherein compositional variation of lead titanate is suppressed in the single crystal growth direction; a method for manufacturing the same; and a piezoelectric single crystal element which is manufactured from the all solid-solution type piezoelectric single crystal ingot at a low cost and has uniform piezoelectric properties. <P>SOLUTION: In manufacturing of the all solid-solution type piezoelectric single crystal ingot 1 composed of a relaxer having a compositional formula of Pb(Mg,Nb)O<SB>3</SB>and lead titanate having a composition of PbTiO<SB>3</SB>, a raw material of the relaxer is continuously fed into a growing crucible in consideration of the segregation coefficient of the lead titanate to the relaxer so that the compositional ratio of the lead titanate is not varied monotonically in the single crystal growth direction A and the variation of the compositional ratio is kept within a range of±2.0 mol% over the length L of≥30 mm. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
