Effect of Cationic Substitutions on Ferroelectric Properties of Pb5Ta10O30: Generation of the Relaxor Behavior

✍ Scribed by V. Hornebecq; C. Elissalde; P. Gravereau; E. Lebraud; J. Ravez

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 374 KB
• Volume: 157
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.9049

✦ Synopsis

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)] on its ferroelectric properties. The ferroelectric behavior of each composition was evidenced by way of dielectric measurements as a function of both temperature and frequency. Structure determinations and re5nements were also performed to determine which crystallographic sites are occupied by the substituted cations, Whatever the nature of the substitution, the relaxor behavior is induced by a weak rate of substitution. Furthermore, except in the case of the calcium-containing composition, no signi5cative di4erence was found concerning crystallographic data. All the results obtained are compared with those described in the literature and discussed in terms of charge, ionic radius, and steric e4ect.