Low temperature dielectric properties of Ca0.7Nd0.3Ti0.7Al0.3O3 microwave ceramics

Sudheendran, K., Raju, K.C. James, and Jacob, Mohan V. (2011) Low temperature dielectric properties of Ca0.7Nd0.3Ti0.7Al0.3O3 microwave ceramics. Journal of the Australian Ceramic Society, 47 (2). pp. 65-68.

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Abstract

CaTiO3-NdAlO3 based ceramic composites with the nominal composition Ca0.7Nd0.3Ti0.7Al0.3O3 was synthesized by the conventional ceramic method and the dielectric measurements were carried out as a function of frequency (1KHz-4MHz) in the temperature range of 150-303 K. The complex impedance spectroscopy (CIS) analysis has been carried out to investigate the influence of its microstructure on electrical properties as a function of temperature and frequency. Impedance studies indicated the presence of a temperature dependent relaxation process in the material with a spread of relaxation times. Microwave measurement at low temperatures reveals that these systems has a slight increase in dielectric constant as temperature decreases and a loss tangent peak around 50Kelvin.

Item ID: 21135
Item Type: Article (Refereed Research - C1)
Keywords: microwave dielectrics, dc conductivity, impedance spectroscopy
ISSN: 1018-6689
Date Deposited: 26 Mar 2012 03:44
FoR Codes: 09 ENGINEERING > 0912 Materials Engineering > 091208 Organic Semiconductors @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 100%
Citation Count from Web of Science Web of Science 2
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