Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of PbTiO3 Concentration on the Properties of $Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3$ Relaxor Ferroelectrics -II. Phase Transition and Electric-field-induced Strains-

$Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3$계 완화형 강유전체의 특성에 미치는 PbTiO3 첨가량의 영향 -II. 상전이 및 전계인가 변위특성-

  • 박재환 (서울대학교 무기재료공학과) ;
  • 김인태 (서울대학교 무기재료공학과) ;
  • 김동영 (서울대학교 무기재료공학) ;
  • 조서용 (서울대학교 무기재료공학과) ;
  • 흥국선 (서울대학교 무기재료공학과) ;
  • 박순자 (서울대학교 무기재료공학과)
  • Published : 1996.05.01
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Abstract

In order to understand the electrostrictive behavior of Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) solid solutions the dielectric constants the electric-field-induced strains and the pyroelectric coefficients of (1-x)PMN-xPT (x=0.1-0.4) were investigated in the temperature range -50~20$0^{\circ}C$. For x=0.1~0.35 where the phase transi-tion is diffusive the strain has a maxima at the temperature of maximum pyroelectric coefficient (depolrizing temperature) rather than the temperature of maximum dielectric constant. For x=0.4 where the phase transition is relatively sharp the strain decreases monotonically as the temperature increases. Relationships among the above experimental results are discussed.

Keywords

References

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