https://scholars.lib.ntu.edu.tw/handle/123456789/73581
標題: | 應用於低溫共燒陶瓷之氧化鑭-氧化矽-氧化硼基玻璃陶瓷之製程及特性分析 Processing and Characterization of La2O3-SiO2-B2O3 Based Glass-Ceramics for LTCC Application |
作者: | 李耀輝 Lee, Yao-Hui |
關鍵字: | 氧化硼;莫來石;玻璃陶瓷;燒結;介電性質;氧化鑭;氧化矽;La2O3;SiO2;dispersion;B2O3;mullite;glass-ceramics;sintering;dielectric | 公開日期: | 2004 | 摘要: | 本研究以高溫熔融及刮刀成型的方法來製作含氧化鑭-氧化矽-氧化硼(LSB)基之玻璃陶瓷材料。鑭-矽-硼氧化物之混合物可在1300oC均勻熔融,部分玻璃系統呈現非晶形狀態,其中LSB3玻璃具有優良的燒結能力。以LSB3玻璃(莫爾百分比: La2O3 22%, SiO2 10%, B2O3 68%) 添加40%莫來石(Mullite) 所組成的玻璃陶瓷 (LSBM) 可在760oC的溫度燒結緻密,得到一燒結密度為3.39 g/cm3及孔隙率低於0.5%的玻璃陶瓷複合材料,符合低溫共燒陶瓷(LTCC)的需求。此外,本研究中嘗試以六種商用之分散劑及兩種溶劑做為分散LSBM玻璃陶瓷之研究,結果顯示甲苯及RE-610分散劑對於LSB玻璃具有最佳的分散效果。研究中並分析相變及微結構,結果顯示LSBM玻璃陶瓷在840oC持溫一小時產生兩種結晶相,一種為薄片狀的鑭-硼-矽結晶 (LaBO(SiO4)),另一結晶相為含鑭-硼的結晶 (LaB3O6)。同時進一步以TEM分析,驗證各個結晶相的成分以及結晶之型態。最後,LSBM玻璃陶瓷的介電常數( Synthesis of La2O3-SiO2-B2O3 (LSB) based glass-ceramic composites using glass melting and tape-casting methods of glass powder/filler has been conducted in this study. The LSB mixture could be melted homogeneously at 1300oC. XRD result showed that some LSB glass systems were entirely amorphous. Among those glasses, LSB3 glass (molar ratio: La2O 3 22%, SiO2 10%, B2O3 68%) showed a superior sintering ability (∆T=115oC). The LSB/mullite (LSBM) glass-ceramics (with a mass ratio of 60/40) composite could be sintered at a low temperature of 760oC, giving an optimal sintered density of 3.39 g/cm3, and porosity less than 0.5 %, which matched the requirements for the low-temperature-cofired- ceramics (LTCC) application. Moreover, dispersive behavior of the L3 glass powder with six kinds of commercial dispersants in MEK and toluene solvents had been studied. Toluene and RE-610 (with an addition of 1.0 mass % to the glass) were found to be the optimal system to L3 glass powder. Furthermore, the investigation on crystal phase formation and microstructure analysis of the LSBM was conducted. LSBM system had two crystal phases, including flaky LaBO(SiO4) crystals and bulky crystalline LaB3O6 grains when sintered above 840oC for 1 h, while the LaBO3 crystal phase was a transient phase between 800oC and 840oC. The dielectric constant ( |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/55318 | 其他識別: | en-US |
顯示於: | 材料科學與工程學系 |
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ntu-93-R91527055-1.pdf | 23.53 kB | Adobe PDF | 檢視/開啟 |
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