AC Electrical Conductivity and Dielectric Properties of Perovskite (Pb,Ca)TiO_3 Ceramic

• Authors: H. El-Mallah
• Languages of publication: EN

Abstracts

EN

Pb_{1 - x }Ca_{x}TiO_3 perovskite crystalline structure with x = 0, 0.2, 0.6, 0.7, and 0.8 were prepared by mixture method. The ac conductivity and dielectric properties of the studied bulk compositions have been investigated in the frequency range 1 × 10^3 - 5 × 10^6 Hz and temperature range 303-473 K. The experimental results indicate that the ac conductivity σ_{ac}(ω), dielectric constant ε' and dielectric loss ε" depend on the temperature and frequency. The ac conductivity was found to obey the power law ω^{S} with the frequency exponent S > 1 decreasing with increasing temperature. The present results are compared to the principal theories that describe the universal dielectric response behavior. Values of dielectric constant ε' and dielectric loss ε" were found to be temperature and frequency dependent and the maximum barrier height W_{m} is calculated.

Keywords

EN

71.45.Gm   72.20.-i   72.80.-r  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 1
• Pages: 174-179

Dates

published

2012-07

received

2011-07-22

(unknown)

2012-04-14

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Identifiers

DOI

10.12693/APhysPolA.122.174