Re-processing CRT phosphors for mercury-free applications

Re-processing CRT phosphors for mercury-free applications. Dexpert-Ghys, J., Regnier, S., Canac, S., Beaudette, T., Guillot, P., Caillier, B., Mauricot, R., Navarro, J., & Sekhri, S. Journal of Luminescence, 129(12):1968–1972, December, 2009. WOS:000271765300139
doi abstract bibtex

This study is part of an operation in the framework of treatment and revalorization of IEEE (Informatics, Electronics and related) wastes It aims to recover the active phosphors in cathode ray tubes (CRTs) and to re-cycle these powders by appropriate treatments as phosphors for mercury-free applications Such as plasma display panels, flat lamps, advertising and lighting. The Studied waste comes from a large panel of CRI's from any supplier. Several thermo-chemical treatments have been investigated. The removal of zinc sulfide-based phosphors and the recovery of a red phosphor Y(2)O(3) Eu(3+) has been achieved by one (basic attack) route. The photoluminescence efficiency under VUV excitation of the obtained powders is at most 30% that of a commercial phosphor The second route (acid attack) appears less promising. It has been established that silicate-based impurities Could prevent isolating the yttrium based phosphor. (C) 2009 Elsevier B V. All rights reserved.

@article{dexpert-ghys_re-processing_2009,
	title = {Re-processing {CRT} phosphors for mercury-free applications},
	volume = {129},
	issn = {0022-2313},
	doi = {10.1016/j.jlumin.2009.04.080},
	abstract = {This study is part of an operation in the framework of treatment and revalorization of IEEE (Informatics, Electronics and related) wastes It aims to recover the active phosphors in cathode ray tubes (CRTs) and to re-cycle these powders by appropriate treatments as phosphors for mercury-free applications Such as plasma display panels, flat lamps, advertising and lighting. The Studied waste comes from a large panel of CRI's from any supplier. Several thermo-chemical treatments have been investigated. The removal of zinc sulfide-based phosphors and the recovery of a red phosphor Y(2)O(3) Eu(3+) has been achieved by one (basic attack) route. The photoluminescence efficiency under VUV excitation of the obtained powders is at most 30\% that of a commercial phosphor The second route (acid attack) appears less promising. It has been established that silicate-based impurities Could prevent isolating the yttrium based phosphor. (C) 2009 Elsevier B V. All rights reserved.},
	language = {English},
	number = {12},
	journal = {Journal of Luminescence},
	author = {Dexpert-Ghys, Jeannette and Regnier, Sophie and Canac, Sophie and Beaudette, Tristan and Guillot, Philippe and Caillier, Bruno and Mauricot, Robert and Navarro, Julien and Sekhri, Salem},
	month = dec,
	year = {2009},
	note = {WOS:000271765300139},
	keywords = {Rare-earth phosphors, Reclaiming, Wastes, crt, phosphors, plasma},
	pages = {1968--1972},
}

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