Izvorni znanstveni članak
Preparation and Characterization of Nanostructured CaCu2.90 Zn0.10 Ti4O12 Ceramic
Laxman Singh
; Department of Chemistry, Faculty of Science, Banaras Hindu University, Indi
U. S. Rai
; Department of Chemistry, Faculty of Science, Banaras Hindu University, Indi
K. D. Mandal
; Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Indi
Sažetak
Nanostructure CaCu2.90Zn0.10Ti4O12 (CCZTO)
electronic ceramic was synthesized by semi‐wet route.
The objective of this route is to enable the calcination and
sintering processes to go for completion in shorter time
and at lower temperature.The samples were
characterized by XRD, TEM, SEM and EDX analyses. The
crystallite size of the CCZTO ceramic, obtained by XRD
using Debye Scherrer formula, range from 38‐74nm
which is in good agreement with the particle size observed
by TEM analysis. It was observed clearly that the grain size
significantly increased with an increase in sintering
duration. Dielectric measurements were carried out by
LCR meter in the temperature range, 300‐ 500K, at few
selected frequencies. It was also observed that the dielectric
constant and dielectric loss of CCZTO are temperature
independent in higher frequency whereas temperature
dependent in low frequency region. The ceramics exhibit
high dielectric constant of 1.35 x 10
4
at 1 kHz.
Ključne riječi
Ceramics; nanoparticles; dielectric properties
Hrčak ID:
76919
URI
Datum izdavanja:
15.9.2011.
Posjeta: 1.780 *