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 Title: Electrically induced antiferroelectric-ferroelectric phase transformations in lead-zirconate titanate stannate ceramics Author(s): Yang, Pin Doctoral Committee Chair(s): Payne, David A. Department / Program: Materials Science and Engineering Discipline: Materials Engineering Degree Granting Institution: University of Illinois at Urbana-Champaign Degree: Ph.D. Genre: Dissertation Subject(s): Engineering, Electronics and Electrical Engineering, Mechanical Engineering, Materials Science Abstract: Antiferroelectric(AFE)-ferroelectric(FE) phase transformations in the tin modified lead zirconate-lead titanate (Pb(Zr,Sn,Ti)O$\sb3,$ i.e., PZST) system were investigated. The field-induced transformation behavior was studied as a function of temperature, pressure, and microstructure. Emphasis is placed on (i) the thermal stability of the AFE-FE transformation, including thermal hysteresis, (ii) microstructure-property relations, and (iii) electromechanical response of the field-induced transformation behavior for actuator applications. A thermodynamic model is proposed to account for the thermal stability of the field-induced transformation characteristics, including reversible and irreversible phenomena. Results are interpreted in terms of thermodynamic relations, and are shown to be interrelated and self-consistent. Fundamental issues underlying the thermodynamic relationships are discussed from the perspective of lattice dynamics theory. Issue Date: 1992 Type: Text Language: English URI: http://hdl.handle.net/2142/19652 Rights Information: Copyright 1992 Yang, Pin Date Available in IDEALS: 2011-05-07 Identifier in Online Catalog: AAI9305742 OCLC Identifier: (UMI)AAI9305742
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