Spark plasma sintering of nano magnesia: Processing parameters influencing optical properties
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Spark plasma sintering of nano magnesia: Processing parameters influencing optical properties
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| Creator |
Halder, R
Bandyopadhyay, S |
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| Subject |
Refractories
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| Description |
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.
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| Publisher |
Elsevier
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| Date |
2019-04
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/4601/1/halder2019.pdf
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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| Relation |
http://cgcri.csircentral.net/4601/
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