Impedance spectroscopic studies of ferroelectric Pb2Sb3DyTi5O18 ceramic

The electrical properties of polycrystalline Pb 2 Sb 3 DyTi 5 O 18 were investigated by complex impedance spectroscopy. The dielectric relaxation was found to be of polydispersive non-Debye type, and relaxation frequency shifts to higher frequencies with increasing temperature. Evidence of temperatu...

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Bibliographic Details
Published inAdvances in applied ceramics Vol. 104; no. 6; pp. 294 - 299
Main Authors Suman, C. K., Prasad, K., Choudhary, R. N. P.
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.12.2005
SAGE Publications
Subjects
ACTIVATION ENERGY
CONDUCTIVITY
DIELECTRIC RELAXATION
IMPEDANCE SPECTROSCOPY
NEGATIVE TEMPERATURE COEFFICIENT OF RESISTANCE
ACTIVATION ENERGY
NEGATIVE TEMPERATURE COEFFICIENT OF RESISTANCE
IMPEDANCE SPECTROSCOPY
DIELECTRIC RELAXATION
CONDUCTIVITY
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Summary:The electrical properties of polycrystalline Pb 2 Sb 3 DyTi 5 O 18 were investigated by complex impedance spectroscopy. The dielectric relaxation was found to be of polydispersive non-Debye type, and relaxation frequency shifts to higher frequencies with increasing temperature. Evidence of temperature dependent electrical relaxation phenomena as well as the negative temperature coefficient of resistance (NTCR) character of the sample have also been observed. The ac conductivity obeys the universal power law and dispersion in conductivity was observed in the lower frequency region. Also, the frequency dependent ac conductivity at different temperatures indicated that the conduction process is thermally activated. The activation energy was estimated to be 0·62 eV from the temperature variation of dc conductivity.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1743-6753
1743-6761
DOI:10.1179/174367605X62580