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Title: 低溫燒結多元摻雜CeO2基固態電解質之研究
Authors: 王耀明;謝濠全;張宏宜
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: 多元摻雜氧化鈰;固態氧化物燃料電池;溶液蒸發法;微波燒結
multi-elements doped CeO2;SOFC;solution evaporation;microwave sintering
Date: 2009
Issue Date: 2011-10-20T08:36:03Z
Publisher: 鑛冶
Abstract: 摘要:氧化鈰摻雜二價、三價金屬,做為中溫的固態氧化物燃料電池電解質擁有高的氧離子導電率。然而多元素的摻雜氧化鈰(La1-x-y SrxBay)0.175Ce0.825O2-δ (LSBC)很難在低的煆燒溫度下得到純相結構,透過傳統固態法(SS)製備組成,在傳統的燒結狀況下,燒結溫度也必需大於1500℃才可得到純相結構以及緻密的燒結密度。利用溶液蒸發法(SV)合成出50nm的LSBC粒子,低於700℃的煆燒溫度就可以得到純相的螢石結構,SV所得粉末可以降低燒結溫度至1300℃,遠低於SS方法的1500℃°微波燒結SV試片,燒結條件1400℃/15min,檢測溫度600℃的氧離子導電率有0.01S/cm,並且密度可以達到98%且晶粒大小約在1µm左右。
abstract:CeO2 materials doped with the dior tri-valent metalspossess high oxygen ionic conductivity for potential electrolyte use in intermediate temperature solid oxide fuel cell (IT-SOFC). However, multi-elements doped CeO2 -based electrolyte, (La1-x-y SrxBay) 0.175Ce0.825O2-δ (LSBC) in this work, with pure phase is difficultly synthesized at low calcination temperature. High sintering temperature, e.g.,>1500℃, is also needed in conventional mixed oxide method to obtain pure fluorite structure and high density. In this work, nanoparticles less than 50nm of LSBC can be prepared by solution-evaporation method (SV) at constant temperature. Pure fluorite crystal structure can be obtained as low as 700℃. The sintering densification temperature of 1300℃ for LSBC prepared by solution-evaporation method is far lower than the 1500℃ by mixed oxide method. The ionic conductivity of 1400℃-microwave sintered LSBC prepared by solution-evaporation method is about 0.01 S/cm at 600℃. The relative density of microwave sintering reaches up to 98%. Small grain size of about 1µm average is observed for 1400℃-microwave sintered LSBC by solution-evaporation method preparation.
Relation: 53(3), pp.17-23
URI: http://ntour.ntou.edu.tw/handle/987654321/26481
Appears in Collections:[輪機工程學系] 期刊論文

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