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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(11) [November 2005] >
| Title: | Dielectric studies of polycrystalline (Sr,Fe)TiO3 ceramics |
| Authors: | Srivastava, K K P
Sinha, K K |
| Keywords: | Ferroelectric ceramics
Relaxor
Dielectric relaxation |
| Issue Date: | Nov-2005 |
| Publisher: | CSIR |
| IPC Code: | G01N33/38 |
| Abstract: | The characteristic
properties of polycrystalline (Sr,Fe)TiO3 ceramics have been studied
through Mössbauer, EPR, IR and differential scanning calorimetry because
perovskite type dielectrics have useful applications in electronic industry. In
Fe-doped materials, the small concentration of Fe atoms provides active centres
that can be probed through Mössbauer and EPR methods which are precise enough
to detect small lattice structural perturbations and yield valuable
information. The present work deals with their dielectric properties including
dielectric relaxation time that is considered an important study from a
theoretical angle. It is found that the two-state Debye relaxation model is
inadequate. These ceramics tend to behave like relaxors with ferroelectric
transition temperature in the range 200-250°C depending upon iron concentration. |
| Page(s): | 884-888 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.43(11) [November 2005]
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