臺灣博碩士論文加值系統

本研究使用雷射輔助閃光燒結(laser assisted flash sintering, LAFS)製備摻鈰釔鋁石榴石螢光陶瓷(cerium-doped yttrium aluminum garnet; YAG: Ce)，探討不同雷射功率與掃描速率之相變態與發光性能的差異。透過光學顯微鏡觀察樣品外觀，表面出現雷射燒結(laser sintering, LS)典型的峰谷特徵，並且隨著雷射功率提升表面孔與起伏形貌隨之增加，因此以表面形貌較難判
別是否受到LAFS影響。而微觀結構在掃描速率由100 mm/s-400 mm/s，雷射能量密度降低的情況下，LAFS表面晶粒依然可觀察到生長，並未出現大幅度的改變。透過拉曼光譜分析樣品成分發現，雷射功率與掃描速率下皆有生成YAG相，並且LAFS樣品之結晶性，隨著掃描速率增加而出現明顯的提升。透過顯微光致發光譜儀系統分析樣品發光性能，發現在不同功率下，LAFS樣品的黃光強度在20 W時產生之黃光強度，與相同參數之LS相比，提升約25.64%。

This study prepares cerium-doped yttrium aluminum garnet (YAG: Ce) by laser assisted flash sintering (LAFS) to explore the phase transformation and luminescence of different laser powers and scanning rates. performance differences. Observing the appearance of the sample with a transmission optical microscope, the typical peak and valley characteristics of laser sintering (LS) appear on the surface. As the laser power increases, the surface pores and undulations increase. Therefore, it is difficult to judge whether the sample is based on the surface morphology. Affected by LAFS. When the scanning rate of the
microstructure is changed from 100 mm/s to 400 mm/s and the laser energy density is reduced, the growth of LAFS surface grains can still be observed without significant changes. Through Raman spectroscopy analysis of the sample components, it was found that the YAG phase was generated under both laser power and scanning rate, and the crystallinity of the LAFS sample increased significantly as the scanning rate increased. The luminescence performance of the sample was analyzed through a micro photoluminescence spectrometer system,
and it was found that under different powers, the yellow light intensity of the
LAFS sample at 20 W increased by approximately 25.64% compared with the LS with the same parameters.

摘要.........................................i
Abstract....................................iii
誌謝.........................................iv
目錄..........................................v
圖目錄.......................................vii
第一章 緒論..................................1
1.1前言..................................1
1.2研究動機與目的.........................1
第二章 論文基礎與文獻回顧.....................2
2.1釔鋁石榴石............................2
2.1.1釔鋁石榴石之晶格結構................2
2.1.2摻鈰釔鋁石榴石......................2
2.1.3釔鋁石榴石製備......................3
2.1.4 DLP投影技術........................3
2.2雷射技術..............................3
2.2.1 CO2雷射...........................4
2.3陶瓷燒結技術...........................4
2.3.1固態反應法..........................4
2.3.2燃燒法..............................4
2.4新興陶瓷燒結技術.......................4
2.4.1雷射燒結技術........................4
2.4.2超快高溫燒結........................5
2.4.3閃光燒結技術........................6
2.5雷射閃光燒結技術.......................8
2.6儀器原理..............................12
2.6.1光學顯微鏡.........................12
2.6.2拉曼光譜儀..........................13
2.6.3螢光光譜儀..........................13
2.6.4掃描式電子顯微鏡.....................14
第三章 實驗方法...............................15
3.1實驗流程 ..............................15
3.2實驗藥品與耗材.........................15
3.3實驗設備...............................16
3.4量測與分析設備.........................17
3.4.1光學顯微鏡..........................17
3.4.2粗度儀.............................17
3.4.3顯微光致發光系統....................17
3.4.4拉曼光譜儀系統......................17
3.4.5掃描式電子顯微鏡.....................17
3.5實驗步驟...............................17
3.5.1前驅物製備..........................17
3.5.2治具設計............................18
3.5.3閃光燒結製備摻鈰釔鋁石榴石............19
3.5.4雷射燒結製備摻鈰釔鋁石榴石............19
3.5.5雷射輔助閃光燒結製備摻鈰釔鋁石榴石.....19
第四章 結果與討論..............................21
4.1閃光燒結摻鈰釔鋁石榴石...................21
4.1.1表面形貌.............................21
4.1.2拉曼光譜分析.........................22
4.2雷射燒結摻鈰釔鋁石榴石...................23
4.2.1表面形貌.............................23
4.2.2粗度儀量測...........................23
4.2.3微觀結構.............................25
4.2.4拉曼光譜分析..........................27
4.2.5顯微光致發光分析......................28
4.3雷射輔助閃光燒結摻鈰釔鋁石榴石............29
4.3.1表面形貌.............................30
4.3.2粗度儀分析...........................30
4.3.3微觀結構.............................32
4.3.4拉曼光譜分析..........................34
4.3.5顯微光致發光分析......................35
第五章 結論....................................37

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