添加玻璃粉末對氧化錫燒結和性質之影響

The Effects of Doping Glass Powder on Sintering and Properties of SnO2

孫宸楷(Cheng-Kai Sun)

指導教授 ： 洪博彥

義守大學/理工學院/材料科學與工程學系/碩士(2015年)

https://doi.org/10.6343/ISU.2015.00219

摘要

利用GeO2, MoO3及V2O5所組成的獨特玻璃可作為助燒劑來增加SnO2陶瓷緻密化及改善其電性能。此法可使燒結溫度降低至950℃左右，並得到優異的電性能。此研究利用金屬氧化玻璃的濃度來改善SnO2陶瓷的緻密化及電性能，主要有運用阿基米得原理、XRD及SEM來完成其研究。此種玻璃的添加能夠不改變SnO2陶瓷的晶體結構，且能改善SnO2陶瓷的緻密化效率及晶粒尺寸。
添加此種玻璃亦能在較低溫下，形成一層很薄連續液相及促進SnO2顆粒重排成較緊密結構。利用熱壓的方式也能協助SnO2的緻密化效率，使得產生相對較小的晶粒尺寸與較緊密的結構。SnO2陶瓷的電性能特性在玻璃摻雜其中時而有所改變。在高濃度玻璃摻雜其中，可能會在晶界周圍形成非晶相，這樣會抑制晶粒成長過快同時對SnO2陶瓷的電化性亦扮演一個重要關鍵角色。而未來研究方向則著重在鑑定晶界及SnO2晶粒的化學組成。

關鍵字

氧化錫 ； 緻密化 ； 金屬氧化玻璃

並列摘要

A unique glass composition based on GeO2, MoO3 and V2O5 was designed to act as sintering aid to enhance the densification and to adjust the electrical properties of SnO2. This allows the low temperature processing of approximately 950 ◦C to be feasible with a desirable electrical property. The effect of metal oxide glass concentration on the densification behavior and electrical properties of SnO2 was investigated by Archimedes' principle, x-ray diffractometer (XRD), scanning electron microscopy (SEM) techniques. The addition of glass was found not to affect the crystal structure of SnO2, but it increased the densification rate and the grain size of SnO2.
The glass additive formed a thin continuous liquid phase and rearranged SnO2 particles into a dense microstructure at much low temperature. Applying the external press during hot pressing also assisted the densification rate of SnO2 and resulted in a relatively small grain size and denser microstructure. The electrical properties of were found to affect by the microstructure of glass doped SnO2 ceramics. At higher glass concentration doping, the possible formation amorphous phase around at grain boundary played a key role on the electrical properties of SnO2 ceramics. Further work on the identification of grain boundary phase is needed to perform as well as chemical composition of SnO2 grains.

並列關鍵字

SnO2 ； densification ； Metal oxide glass

參考文獻

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