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Conductivity dispersion and scaling studies in Na3M2P3O12 orthophosphate (M2=Fe2, TiCd, TiZn)

โœ Scribed by C.R. Mariappan; G. Govindaraj

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
464 KB
Volume
353
Category
Article
ISSN
0921-4526

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โœฆ Synopsis

Conductivity dispersion, electric modulus and their scaling are studied for Na 3 M 2 P 3 O 12 orthophosphate (M 2 =Fe 2 , TiCd, TiZn) glassy and crystallized glassy materials in the frequency range 20 Hz to 1 MHz at different temperatures (T). The power law and the stretched exponential approaches are used to analyze dispersion data. The DC conductivity s DC of crystallized glass is found to be greater than that of the parent glass. The conductivity scaling is studied with different scaling parameters like hopping frequency o p ; the Summerfield scaling parameter s DC T and modified the Summerfield scaling parameter s DC T=T a ; where a shows the temperature dependence. Ngai's correlation is also observed between power-law exponent n and stretched exponent b:

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