کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1463586 | 989648 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Study of structural, dielectric and electrical conduction behaviour of Gd substituted CaCu3Ti4O12 ceramics Study of structural, dielectric and electrical conduction behaviour of Gd substituted CaCu3Ti4O12 ceramics](/preview/png/1463586.png)
Effect of Gd on microstructural, dielectric and electrical properties has been studied over wide temperature (300–500 K) and frequency range (100 Hz–1 MHz). Gd substitution in CCTO system results in decrease in the grain size and increase of Schottky potential barrier which causes lower value of dielectric constant. The dielectric constant remains nearly constant in temperature range 300–350 K. Doped samples show lower dielectric loss in middle frequency range (∼10 kHz–1 MHz) at room temperature. The AC conductivity (σac) obeys a power law, σac = Afn, where n is temperature dependent frequency exponent. The AC conductivity behaviour can be divided into three regions depending on conduction processes and the relevant charge transport mechanisms have been discussed.
Journal: Ceramics International - Volume 38, Issue 4, May 2012, Pages 3029–3037