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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.44 [2006] >
IJPAP Vol.44(06) [June 2006] >
| Title: | Correlation between EPR, dielectric spectroscopic and conductivity studies of lithium substituted Na2Ti3O7 ceramic |
| Authors: | Pal, D
Tandon, R P
Shripal |
| Keywords: | Sintering
Dielectric properties
Ionic conductivity
TiO2 |
| Issue Date: | Jun-2006 |
| Publisher: | CSIR |
| IPC Code: | G01R27/26 |
| Abstract: | The lithium substituted Na2Ti3O7
ceramics with a general formula (Na2-xLixTi3O7)
with (x = 0.1) have been synthesized
by high temperature solid-state reaction technique. Preliminary EPR analysis
and detailed temperature and variable frequency dielectric, conductivity
measurements were carried out on the prepared sample. The lithium ions are accommodated
with the sodium ions in the interlayer space. The EPR spectrum of Na1.9Li0.1Ti3O7
confirms the partial reduction of Ti4+ ions to Ti3+.
The observed dispersion in the dielectric constant-temperature relation can be
explained on the basis of Maxwell-Wagner model. The
conductivity plots between ln (σT)
versus 1000/T have been divided into
four regions. The various conduction mechanisms in the different regions have
been stressed in this paper. The interlayer ionic conduction seems to play
major role in conduction towards higher temperature. |
| Page(s): | 435-439 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.44(06) [June 2006]
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