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https://hdl.handle.net/10356/67050
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DC Field | Value | Language |
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dc.contributor.author | Lim, Pearlyn Shang Mei | |
dc.date.accessioned | 2016-05-11T04:30:23Z | |
dc.date.available | 2016-05-11T04:30:23Z | |
dc.date.issued | 2016 | |
dc.identifier.uri | http://hdl.handle.net/10356/67050 | |
dc.description.abstract | Solid state laser ceramics had caught the attention of researchers from around the world. This project serves to evaluate the effects of ammonium sulfate on the morphology of co-precipitated powders and how sintering temperature affect the transparency of yttrium oxide ceramics. Both factors are studied to reduce the porosity to attain transparent ceramic for solid-state laser application. A comparison between solid state reaction and wet chemical co-precipitation was done. Particles synthesized by co-precipitation show less agglomeration and narrow particle size distribution. It was proved that 50.at% ammonium sulfate was sufficient to obtain uniform particle size distribution with little agglomerations. The presence of ammonium sulfate resulted in good powder dispersity. Ceramics with 50.at% ammonium sulfate was sintered at 3 different temperatures, 1650ºC, 1750ºC and 1850ºC. At 1850ºC, yttrium oxide ceramic exhibited no pores with uniform grain size. In-line transmittance was measured for all 3 ceramics sintered at different temperature. After sintering at 1850 ºC, the Y2O3 ceramic exhibited the highest transmittance, which achieved 69% at 2000 nm. Y2O3 ceramic sintered at 1650 ºC, however, was translucent. To attain fully transparent Y2O3 ceramic, future improvement could be done on reducing its porosity further. | en_US |
dc.language.iso | en | en_US |
dc.rights | Nanyang Technological University | |
dc.subject | DRNTU::Engineering | en_US |
dc.title | Fabrication and characterization of transparent ceramics for solid state laser applications | en_US |
dc.type | Final Year Project (FYP) | en_US |
dc.contributor.supervisor | Kong Ling Bing | en_US |
dc.contributor.school | School of Materials Science and Engineering | en_US |
dc.description.degree | Bachelor of Engineering (Materials Engineering) | en_US |
dc.contributor.research | Advanced Materials Research Centre | en_US |
item.fulltext | With Fulltext | - |
item.grantfulltext | restricted | - |
Appears in Collections: | MSE Student Reports (FYP/IA/PA/PI) |
Files in This Item:
File | Description | Size | Format | |
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FYP Report.pdf Restricted Access | 1.51 MB | Adobe PDF | View/Open |
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