Effect of Sr-doping on sinterability, morphology, structure, photocatalytic activity and AC conductivity of ZnO ceramics

Das, T and Das, BK and Parashar, K and Kumar, R and Choudhary, Harish Kumar and Anupama, AV and Sahoo, B and Sahoo, PK and Parashar, SKS (2017) Effect of Sr-doping on sinterability, morphology, structure, photocatalytic activity and AC conductivity of ZnO ceramics. In: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 28 (18). pp. 13587-13595.

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Abstract

The change in morphology, structure, catalytic activity and ac electrical conductivity of the Sr-doped ZnO (Zn1-xSrxO, x = 0, 0.01, 0.02 and 0.03) ceramic powders was investigated after sintering. The sintering of the Sr-doped samples results in faster growth in particle-size and the shape becomes spherical by dissolution of the sharp edges in order to reduce the strain produced by Sr-doping and to reduce the surface energy. The growth in particle-size reduces the photocatalytic activity. Sr-doping reduces the band gap of ZnO by a small value (similar to 0.1 eV). The ac conductivity values decrease with increase in Sr-concentration, but increase with temperature and frequency. This behavior is due to the conduction by small polarons created by Sr-doping. Our results may facilitate a way for the easy fabrication of monolithic ZnO based devices with improved dielectric and semiconducting properties of ZnO ceramics by doping a small amount of Sr.

Item Type:	Journal Article
Publication:	JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Additional Information:	Copy right for this article belongs to the SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	23 Sep 2017 05:09
Last Modified:	01 Mar 2019 09:27
URI:	http://eprints.iisc.ac.in/id/eprint/57860

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