| 热电氧化物(Ca_3Co_2O_6)_(1-x)(Ca_3Co_4O_9)_x的制备和表征 |
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| 引用本文： | 路庆凤,王海英,李喜贵,胡保付,李玉山. 热电氧化物(Ca_3Co_2O_6)_(1-x)(Ca_3Co_4O_9)_x的制备和表征[J]. 河南师范大学学报(自然科学版), 2005, 33(2): 37-39,43 |
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| 作者姓名： | 路庆凤 王海英 李喜贵 胡保付 李玉山 |
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| 作者单位： | 河南师范大学,物理与信息工程学院,河南,新乡,453007 |
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| 基金项目： | 河南省教委自然科学基础研究项目(2003140029) |
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| 摘 要： | 热电氧化物Ca3Co2O6和Ca3Co4O9是Ca-Co-O体系中两个确定的态,其热电性质显著不同.我们采用“快速加热法”制备了(Ca3Co2O6)1-x(Ca3Co4O9)x(x=0,0.2,0.4,0.6,0.8,1),并利用XRD、SEM等实验方法分析表征样品,系统研究了热电氧化物从Ca3Co2O6到Ca3Co4O9的转化过程.从SEM图中可知Ca3Co2O6为无规取向棒状结构,Ca3Co4O9为法向取向与表面近似垂直的片状结构,XRD结果显示x=0.4之前的样品Ca3Co2O6和Ca3Co4O9两相衍射峰并存,x=0.6以后的样品是Ca3Co4O9单相.
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| 关 键 词： | 热电氧化物 快速加热法 SEM XRD |
| 文章编号： | 1000-2367(2005)02-0037-03 |
Preparation and Marking Series of Thermoelectric Oxides (Ca3Co2O6)x(Ca3Co4O9)1-x |
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| LU Qing-feng,WANG Hai-ying,LI Xi-gui,HU Bao-fu,LI Yu-shan. Preparation and Marking Series of Thermoelectric Oxides (Ca3Co2O6)x(Ca3Co4O9)1-x[J]. Journal of Henan Normal University(Natural Science), 2005, 33(2): 37-39,43 |
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| Authors: | LU Qing-feng WANG Hai-ying LI Xi-gui HU Bao-fu LI Yu-shan |
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| Abstract: | In Ca-Co-O system, there are two identified phases Ca_3Co_2O_6 and Ca_3Co_4O_9 with much different thermoelectric properties. We have prepared (Ca_3Co_2O_6)_x(Ca_3Co_4O_9)_ 1-x(x=0,0.2,0.4,0.6,0.8,1) by “rapid heating procedure” and investigated series of samples using XRD,SEM techniques. From SEM figure we can see that Ca_3Co_2O_6 has short-bar structure with all kinds of directions and Ca_3Co_4O_9 has flaky structure which is parallel to the surface. The result of XRD showed us that the samples before x=0.6 exist both materials peaks, the samples after x=0.6 only exist Ca_3Co_4O_9 one material's XRD peak. |
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| Keywords: | thermoelectric oxiees rapid heating procedure SEM XRD |
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