The Effect of Mechanical Stress and Electric Field on the Morphotropic Tetragonal and Rhombohedr Phase Boundary in PZT System : Thermodynamic Consideration

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J. Korean Ceram. Soc. > Volume 30(10); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(10): 859.

PZT계의 정방정상과 능면체정상의 경계조성에 대한 기계적 응력과 전기장의 영향 : 열역학적 고찰

천채일, 김호기¹

호서대학교 재료공학과
¹한국과학기술원 무리재료공학과

The Effect of Mechanical Stress and Electric Field on the Morphotropic Tetragonal and Rhombohedr Phase Boundary in PZT System : Thermodynamic Consideration

ABSTRACT

Morphotropic tetragonal and rhombohederal phase boundary(MPB) in PZT system was calculated and the effect of mechanical stress and electric field on the MPB was examined using phenomenological thermodynamic theory proposed by Devonshire. Mechanical stress and electric field was calculated to change free energies of phases and shift MPB. The stable composition range of the phase, of which spontaneous strain and spontaneous polarization aligned to the direction of tensile stress or electirc field, was expanded.