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Optimization of the protection layer in gas-discharge lamps
2008 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This work is based on the intention to improve the lifetime of discharge fluorescent lamps by preventing darkening effects trough a protection layer. In a literature review, the darkening mechanism in fluorescent lamps and the protection layer were studied. Furthermore, it was tried to find already existent characterization methods for the protection layer and the darkening mechanism in the literature. It was attempted to apply these methods to the provided test lamps in the experimental part. In that part, the provided lamps were measured and characterized by using SEM, EDS and XRD. High resolution pictures were taken in order to understand the nanostructure of the protection layer. Energy dispersive x-rays analysis was done to obtain the composition of the protection layers and it was tried to verify the mercury darkening at the ending of the lamps. Through XRD, the crystal size was calculated by using Scherrer’s equation. Crystallinity was also investigated. Last but not least, the improvements based on the literature and on the experimental results were proposed.

Place, publisher, year, edition, pages
Keyword [en]
Technology, fluorescent lamps, darkening mechanism, x-rays analysis, protection layer, lifetime, Scherrer’s equation, nanostructure, characterization methods
Keyword [sv]
URN: urn:nbn:se:ltu:diva-44786ISRN: LTU-PB-EX--08/082--SELocal ID: 2894373c-bd94-444b-84d2-3b36b4e9c4acOAI: diva2:1018065
Subject / course
Student thesis, at least 30 credits
Educational program
Materials Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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