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Microstructural and dielectric properties of hot-pressed organic composite: benzil-4-aminobenzophenone

Rai, RN and Panchapagesan, TS and Varma, KBR (2001) Microstructural and dielectric properties of hot-pressed organic composite: benzil-4-aminobenzophenone. In: Journal Of Materials Science-Materials In Electronics, 12 (9). pp. 505-509.

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Transparent binary organic composites of nonlinear optical (NLO)materials (benzil-4-aminobenzophenone) were prepared by a hot-pressing technique. The microstructural characterization by scanning electron microscope revealed an increase in grain size with increasing hot-pressing conditions. The dielectric studies as a function of frequency (1 kHZ to 10 MHz) show a decrease in dielectric constant with increase in frequency, while it increases with increasing temperature at lower frequencies. The X-ray diffraction studies and infrared spectroscopy confirm the true nature of the composite. An attempt was made to predict the dielectric constants of the present organic composite using Reynolds and Hough as well as Maxwell's equations of dielectric mixture formulae. The theoretically obtained values of the dielectric constants are found to be slightly higher than that of experimental values. The discrepancy in these values is attributed to the non-spherical nature of the crystallites in the composite.

Item Type: Journal Article
Publication: Journal Of Materials Science-Materials In Electronics
Publisher: Kluwer Academic Publishers
Additional Information: Copyright of this article belongs to Kluwer Academic Publishers.
Keywords: System
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 04 Feb 2010 04:46
Last Modified: 19 Sep 2010 04:55
URI: http://eprints.iisc.ac.in/id/eprint/17167

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