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Electrical transport characteristics of ZnO-Bi2O3-B2O3 glasses

Majhi, Koushik and Vaish, Rahul and Paramesh, Gadige and Varma, KBR (2013) Electrical transport characteristics of ZnO-Bi2O3-B2O3 glasses. In: IONICS, 19 (1). pp. 99-104.

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Official URL: http://dx.doi.org/10.1007/s11581-012-0712-1


Optically clear glasses in the ZnO-Bi2O3-B2O3 (ZBBO) system were fabricated via the conventional melt-quenching technique. Dielectric constant and loss measurements carried out on ZBBO glasses unraveled nearly frequency (1 kHz-10 MHz)-independent dielectric characteristics associated with significantly low loss (D = 0.004). However, weak temperature response was found with temperature coefficient of dielectric constant 18 +/- 4 ppm A degrees C-1 in the 35-250 A degrees C temperature range. The conduction and relaxation phenomena were rationalized using universal AC conductivity power law and modulus formalism respectively. The activation energy for relaxation determined using imaginary parts of modulus peaks was 2.54 eV which was close to that of the DC conduction implying the involvement of similar energy barriers in both the processes. Stretched and power exponents were temperature dependent. The relaxation and conduction in these glasses were attributed to the hoping and migration of Bi3+ cations in their own and different local environment.

Item Type: Journal Article
Publication: IONICS
Additional Information: Copyright for this article belongs to SPRINGER HEIDELBERG, GERMANY
Keywords: Zinc-bismuth-borate glass;Ionic conductivity;Electric modulus;Dielectric relaxation
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 06 Feb 2013 12:19
Last Modified: 06 Feb 2013 12:19
URI: http://eprints.iisc.ac.in/id/eprint/45721

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