De, A and Kundu, S (2017) Dielectric Properties of Gel-Calcined Cd-Zn Oxide Nanocomposites. Journal of Ceramic Science and Technology, 8 (4). pp. 463-469. ISSN 2190-9385

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Abstract

Cd-Zn oxide nanocomposites have been synthesized with a novel yet simple sol-gel technique. Zn(NO3)(2)center dot 6H(2)Oand Cd(NO3)(2)center dot 4H(2)O were used as starting materials and the concentration of Cd was varied as follows: 5, 10, 15 and 20 atom%. Gels were calcined at 500 degrees C for 2 h to obtain nanocomposite. Thermogravimetric analysis was applied to monitor the process. XRD analysis revealed the presence of polycrystalline phases of hexagonal wurtzite ZnO and cubic CdO. FESEM, TEM studies indicated development of nanocomposites of nearly spherical shapes. The high dielectric constant values of the nanocomposites at low frequencies were observed owing to space charge polarization and field-induced rotation polarization. Maximum polarization effect and AC conductivity owing to the presence of maximum defect centres in 20 atom%-Cd-containing nanocomposite could be identified.

Item Type:	Article
Subjects:	Electronics
Divisions:	Sensor and Actuator
Depositing User:	Bidhan Chaudhuri
Date Deposited:	02 Feb 2018 07:06
Last Modified:	02 Feb 2018 07:06
URI:	http://cgcri.csircentral.net/id/eprint/4124

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