| 纳米晶La_（1－_x）Sr_xFeO_3的合成及气敏特性的研究 |
| |
| 引用本文： | 吴凤清,徐宝琨,李熙,索辉,杨桦,赵慕愚.纳米晶La_（1－_x）Sr_xFeO_3的合成及气敏特性的研究[J].高等学校化学学报,1994(6). |
| |
| 作者姓名： | 吴凤清 徐宝琨 李熙 索辉 杨桦 赵慕愚 |
| |
| 作者单位： | 吉林大学化学系 |
| |
| 摘 要： | 用柠檬酸盐法合成出Ｌａ_（１－_ｘ）Ｓｒ_ｘＦｅＯ_３（ｘ＝０．１，０．２，０．３，０．４）原粉，再经固相反应得到纳米晶粉末，用ＴＧ、ＤＴＡ、ＸＲＤ、ＩＲ进行了表征，确证复合氧化物Ｌａ_（１－_ｘ）Ｓｒ_ｘＦｅＯ_３为钙钛矿型结构，粒径在１０～２５ｎｍ之间。实验结果表明，随着固相反应条件不同，产物粒径呈规律性变化．气敏特性研究表明，该纳米晶材料对乙醇有较高的选择性和灵敏度，其选择性顺序为Ｌａ_（０．９）Ｓｒ_（０．１）ＦｅＯ_３＞ＬａＦｅＯ_３＞ＬａＦｅＯ_３（大晶粒）。
|
| 关 键 词： | 纳米晶，钙钛矿型，气敏特性 |
Studies on Synthesis and Sensing Characteristics of Nanocrystalline La_(1-x)Sr_xFeO3 |
| |
| WU Feng-Qing,XU Bao-Kun,LI Xi,SUO Hui,YANG Hua,ZHAO Mu-Yu.Studies on Synthesis and Sensing Characteristics of Nanocrystalline La_(1-x)Sr_xFeO3[J].Chemical Research In Chinese Universities,1994(6). |
| |
| Authors: | WU Feng-Qing XU Bao-Kun LI Xi SUO Hui YANG Hua ZHAO Mu-Yu |
| |
| Abstract: | Using citrate method,a series of nanocrystalline materials of composite oxides La1-xSrxFeO3(x=0,0.1,0.2,0.3,0.4)were synthesized.These samples were characterized by XRD,IR,TG and DTA.The crystal structure is of perovskite-ype;The grain size is about 10-25 nm,The experimental results show that the grain sizes are related to the composition,calcination temperature and time,and nanocrystalline materials La1-xSrxFeO3(x=0,0.1)possess a high selectivity to ethanol,the order of selectivity is La0.9Sr0.1FeO3>LaFeO3(23nm)>LaFeO3(110nm). |
| |
| Keywords: | Nanocrystalline Perovstite-type Sensing character |
| 本文献已被 CNKI 等数据库收录！ |
|
