以噴霧熱解合成多成分金屬氧化物粉體之內部微結構研究

Internal Microstructures of Multi-Component Metal Oxides Powders Prepared by Spray Pyrolysis

李宗哲(Tsung-Che Lee)

指導教授 ： 張幼珍

元智大學/工程學院/化學工程與材料科學學系/碩士(2005年)

摘要

本研究以傳統噴霧熱分解和火焰噴霧熱分解技術合成多成分金屬氧化物粉體，此兩種技術原理皆為液體轉化成產物微粒的氣相製程；研究中使用兩種不同熱源來製備多成分金屬氧化物微粒包括鈦酸鋇(barium titanate, BaTiO3)、藍色螢光粉體(Ba-Mg-Al-O, BaMgAl10O17)以及超導體(Y-Ba-Cu-O, YBa2Cu3O7)等三種高性能陶瓷粉體。研究中所製備的粉體特性分析包括以XRD (X-ray diffraction)進行產物粉體之化學組成與晶粒大小(grain size)等的分析與鑑定、以掃描式電子顯微鏡 (Scanning electron microscopy, SEM)和穿透式電子顯微鏡(Transmission electron microscopy, TEM)來觀察粉體外觀形貌結構與粒徑大小、以X射線能量散佈分析儀(Energy dispersive spectroscopy)分析粉體的元素組成(elemental composition)，以及製作TEM截面試片來觀察單顆粉體截面與內部微結構。

關鍵字

多成分金屬氧化物、噴霧熱分解、內部微結構

並列摘要

The syntheses of three multi-component metal oxide powders via conventional spray pyrolysis (SP) and flame spray pyrolysis techniques are presented here. Basically, both techniques follow a liquid-to-particle formation process in the gas phase, with the major difference in the choice of heat source, electrical furnace versus a low-pressure flat flame. Attempts were made to synthesize three high-performance ceramic powders, barium titanate (BaTiO3), Ba-Mg-Al-O (BaMgAl10O17) and Y-Ba-Cu-O(YBa2Cu3O7) using both techniques. Internal microstructures of the as-derived powders were investigated by preparing TEM cross-section specimen of individual particles. The as-prepared powders were characterized by XRD, EDS, SEM/FE-SEM, and TEM to determine their composition, size distribution, grain size, and morphology.

並列關鍵字

multi-component metal oxides, spray pyrolysis, internal microstructure

參考文獻

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