| (Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)氧化物的制备和热电性能研究 |
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| 引用本文： | 张静文,张飞鹏,杨新宇,王盼,杨之,张久兴.(Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)氧化物的制备和热电性能研究[J].稀有金属材料与工程,2019,48(2):644-649. |
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| 作者姓名： | 张静文 张飞鹏 杨新宇 王盼 杨之 张久兴 |
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| 作者单位： | 合肥工业大学材料科学与工程学院,河南城建学院数理学院,合肥工业大学材料科学与工程学院,合肥工业大学材料科学与工程学院,合肥工业大学材料科学与工程学院,合肥工业大学材料科学与工程学院 |
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| 基金项目： | 国家自然科学(51572066)和第一届河南省自然科学基金(162300410007)项目资助 |
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| 摘 要： | 利用溶胶凝胶法制备出(Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)氧化物粉末后,先分别采用氩气气氛的放电等离子烧结和空气气氛的常压烧结制备出CaMnO3(CMO)块体,并对其相组成进行分析,选择出更为优异的CaMnO3块体制备方法。再进一步制备出(Ca0.96D0.04)MnO3(D=Sr, Rb, Sm)氧化物块体,最后对(Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)块体的物相组成、显微组织和热电性能进行测试分析。实验结果表明：氩气气氛放电等离子烧结制备的CaMnO3块体发生物相分解,原因是放电等离子烧结的烧结环境贫氧；空气气氛的常压烧结可以得到物相较纯净的(Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)块体；在整个测试温度范围内,(Ca0.96D0.04)MnO3(D= Sr, Rb, Sm)的ZT值在873K时达到最大,分别为0.11、0.08和0.07,相比于未掺杂试样提高了约1.3~2.2倍。
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| 关 键 词： | CaMnO3 放电等离子烧结 掺杂 热电性能 |
| 收稿时间： | 2017/7/4 0:00:00 |
| 修稿时间： | 2017/8/5 0:00:00 |
Preparation and thermoelectric properties of (Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm) |
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| ZHANG Jingwen,ZHANG Feipeng,YANG Xinyu,WANG Pan,YANG Zhi and ZHANG Jiuxing.Preparation and thermoelectric properties of (Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)[J].Rare Metal Materials and Engineering,2019,48(2):644-649. |
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| Authors: | ZHANG Jingwen ZHANG Feipeng YANG Xinyu WANG Pan YANG Zhi and ZHANG Jiuxing |
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| Affiliation: | Anhui Provincial Key Lab of Advanced Functional Materials and Devices,College of Materials Science and Engineering,Hefei University of Technology,Hefei,,Anhui Provincial Key Lab of Advanced Functional Materials and Devices,College of Materials Science and Engineering,Hefei University of Technology,Hefei,Anhui Provincial Key Lab of Advanced Functional Materials and Devices,College of Materials Science and Engineering,Hefei University of Technology,Hefei,Anhui Provincial Key Lab of Advanced Functional Materials and Devices,College of Materials Science and Engineering,Hefei University of Technology,Hefei,Anhui Provincial Key Lab of Advanced Functional Materials and Devices,College of Materials Science and Engineering,Hefei University of Technology,Hefei |
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| Abstract: | The (Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm) oxide powders were prepared by sol-gel method firstly, and the CaMnO3(CMO) bulk samples were prepared thereafter by spark plasma sintering in argon atmosphere and air atmospheric sintering at ordinary pressure respectively. After analyzing their phase compositions, the better preparation method of CaMnO3 bulk samples are selected and then the (Ca0.96D0.04) MnO3 (D=Sr, Rb, Sm) oxide bulks were prepared. Finally, the phase composition, microstructure and thermoelectric properties of (Ca0.96D0.04) MnO3 (D=Ca, Sr, Rb, Sm) bulk samples are measured and analyzed. The results show that the CaMnO3(CMO) bulk samples prepared by spark plasma sintering in argon atmosphere have occurred phase decomposition, which is due to the SPS poor oxygen sintering environment. High quality (Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm) bulk samples with single phase can be prepared by atmospheric sintering at ordinary pressure. The dimensionless figure of merit ZT is improved with peak values of 0.11,0.08,0.07 at 873K for (Ca0.96D0.04)MnO3(D= Sr, Rb, Sm) bulk samples respectively, which are about 1.3~2.2 times higher than that of the un-doped samples. |
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| Keywords: | CaMnO3 spark plasma sintering doping thermoelectric performance |
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