Halder, R and Bandyopadhyay, S (2019) Spark plasma sintering of nano magnesia: Processing parameters influencing optical properties. Materials Chemistry and Physics, 228. pp. 51-59. ISSN 0254-0584

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Abstract

Densification of laboratory-made nanocrystalline magnesium oxide powder synthesized by gel combustion method was performed through spark-plasma-sintering using both pulsed and unpulsed DC. Grain growth in post-sintered microstructure limited within 200 nm. Photoluminescence study through Gaussian splitting of broad band emission spectra reveals that SPS-processing enhances luminescence in bulk specimens because of oxygen vacancies generated under reducing atmosphere during sintering. Influence of heat treatment on the defect-induced photoluminescence behaviour was investigated. Decrease in emission intensity with post-sintering annealing temperature, caused by decreasing concentration of colour centres due to oxygen recombination process, has been found to be related to the improvement in transmittance property.

Item Type:	Article
Subjects:	Refractories
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	14 Nov 2019 09:36
Last Modified:	14 Nov 2019 09:36
URI:	http://cgcri.csircentral.net/id/eprint/4601

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