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 (Research - C1) |
| ISSN: | 1018-6689 |
| Keywords: | microwave dielectrics, dc conductivity, impedance spectroscopy |
| 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% |
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