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FERROELECTRIC CHARACTERIZATION AND AC-CONDUCTIVITY PROPERTIES OF Bi4 - xPrxTi3O12 POLYCRYSTALS

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Abstract:

Effects of Praseodymium doping on the ferroelectric properties of Bi4Ti3O12 using dense ceramics were systematically investigated from room temperature to 730°C. DRX studies show that Aurivillius structure can accept low amounts of praseodymium without the precipitation of second phases. Thermoelectric analysis and ferroelectric hysteresis measurements were performed and show that the incorporation of praseodymium modified the transition temperature (Tc) and slightly the polarization values. The incorporation of praseodymium resulted in a variation in the permittivity and in the remnant polarization. The polarization characteristics of the doped samples were different to those of Bi4Ti3O12. AC-conductivity was calculated for each sample and different conduction mechanisms are identified using the typical Arrhenius law.

Keywords: BIT Ceramics; conductivity mechanisms; praseodymium doping

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10584580802451389

Affiliations: 1: F.I. TEC. MA, U.M.S.N.H. Edificio “O” Ciudad Universitaria, Morelia, Michoacan, Mexico 2: Centro de Nanociencias y Nanotecnologia-Universidad Nacional Autonoma de Mexico, Ensenada, B.C., Mexico,Facultad de Ciencias UABC, Campus Ensenada, Ensenada, B.C., Mexico 3: Centro de Investigacion en Materiales Avanzados, Apodaca, N.L., Mexico 4: Centro de Nanociencias y Nanotecnologia-Universidad Nacional Autonoma de Mexico, Ensenada, B.C., Mexico

Publication date: January 1, 2008

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tandf/ginf/2008/00000101/00000001/art00003
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