Shukla, A. K. and Agrawal, V. K. and Das, M. L. and Singh, Janardan and Srivastava, S. L.
(2010)
Dielectric response of PLZT ceramics x/57/43 across ferroelectric-paraelectric phase transition.
Bulletin of Materials Science , 34 (1).
pp. 133-142.
ISSN 0973-7669
Abstract
The dielectric properties of lead lanthanum zirconate titanate (PLZT) ceramics [Pb(Zr0·57Ti0·43)O3 + x at% of La, x = 3, 5, 6, 10 and 12] have been measured in the frequency range 1 Hz–1 MHz using the vector impedance spectroscopy (VIS) at different temperatures. All the compositions show both non-dispersive and dispersive dielectric responses in different temperature regions. The non-dispersive region obeys the universal dielectric response. A low frequency (<1 kHz) relaxation phenomenon with a high value of distribution parameter ‘h’ (~0·4 to 0·6) has been observed in all the compositions around the temperature corresponding to the maximum dielectric constant (T m). The activation energies as calculated from the relaxation and d.c. conduction processes are comparable. The ferroelectric phase transition is diffuse in nature and broadening of the peak increases with La content.
| Item Type: |
Article
|
| Uncontrolled Keywords: |
PLZT; dielectric relaxation; diffuse phase transition |
| Subjects: |
Materials Science |
| Divisions: |
UNSPECIFIED |
| Depositing User: |
Mr. Abhishek Yadav
|
| Date Deposited: |
29 Nov 2012 07:22 |
| Last Modified: |
29 Nov 2012 07:22 |
| URI: |
http://npl.csircentral.net/id/eprint/852 |
Actions (login required)
 |
View Item |
![[img]](http://npl.csircentral.net/style/images/fileicons/application_pdf.png)
