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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.42 [2004] >
IJPAP Vol.42(12) [December 2004] >
| Title: | Structural and electrical properties of nano-sized magnesium aluminate |
| Authors: | Kurien, Siby
Sebastian, Shajo
Mathew, Jose
George, K C |
| Keywords: | Nanosized magnesium aluminate
Electrical conductivity
Molarity |
| Issue Date: | Dec-2004 |
| Publisher: | CSIR |
| IPC Code: | B82B |
| Abstract: | The effects of
temperature, frequency, and molarity on the dielectric behaviour and ac
electrical conductivity have been studied for nanosized samples of MgAl2O4
prepared by chemical co-precipitation technique. X-ray powder diffraction (XRD)
study shows that the particle size is 8 nm and the system is orthorhombic. FTIR
studies have been used to confirm the formation of the resultant compound. The
variations of dielectric constant (ε'), the loss tangent (tanδ) as a
function of frequency (200 Hz – 4 MHz) and the temperature (303-450 K) have
also been studied. The experimental results indicate that the real dielectric
constant (ε'), tanδ, and logσ increase
with temperature and then decrease. The dielectric constant (ε'), and tanδ,
decrease while the ac conductivity (σac) increases as the frequency increases. |
| Page(s): | 926-933 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.42(12) [December 2004]
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