Impedance Spectroscopic Studies of Sol–Gel Derived Nanocrystalline CaCu3Ti4O12
IR@NPL: CSIR-National Physical Laboratory, New Delhi
View Archive Info| Field | Value | |
| Title |
Impedance Spectroscopic Studies of Sol–Gel
Derived Nanocrystalline CaCu3Ti4O12
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| Creator |
Kumar, Ranjit
Zulfequar, M. Kaur, Harjeet Singh, V. N. Senguttuvan, T. D. |
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| Subject |
Nanoscience/ Nanotechnology
Physics Spectroscopy |
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| Description |
Nanocrystalline CaCu
3
Ti
4
O
12
was synthesized by a sol–gel reaction route. The sample was calcined
at 700
�
C and sintered at 1025
�
C. Phase identification and structural analysis were carried out
using XRD, HRTEM and SEM. Dielectric measurement was carried out by applying 1 volt ac input
signal and 1 volt dc bias voltage in the frequency range of 10 Hz to 5 MHz. Impedance spectroscopy
was used to find out the polarization mechanism existing at grain regime. The results revealed
that the dielectric polarization is associated with grains, grain boundaries and electrode-ceramic
interface. The calculated capacitance values are in the range of nano farads, resistance values are
of the order of mega ohms and dipole relaxation time values are from milli to micro seconds. It
was observed that the grain’s dipoles are more compatible with applied signal than that of grain
boundary. The signature of leakage current in the range of micro-ampere is also observed.
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| Publisher |
American Scientific Publishers
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| Date |
2011
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/2230/1/impedance%20spectroscopic%20studies%20of%20sol%20gel_vol32011.pdf
Kumar, Ranjit and Zulfequar, M. and Kaur, Harjeet and Singh, V. N. and Senguttuvan, T. D. (2011) Impedance Spectroscopic Studies of Sol–Gel Derived Nanocrystalline CaCu3Ti4O12. Advanced Science Engineering and Medicine , 3 (3). pp. 197-201. ISSN 2164-6627 |
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| Relation |
http://npl.csircentral.net/2230/
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