Preparation and thermoelectric properties of (Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)

doi:10.12442/j.issn.1002-185X.20170591

Home > Archive>Volume 48, Issue 2, 2019 >644-649. DOI:10.12442/j.issn.1002-185X.20170591

Preparation and thermoelectric properties of (Ca0.96D0.04)MnO3(D=Ca, Sr, Rb, Sm)
DOI:
                        10.12442/j.issn.1002-185X.20170591
                    
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                        ZHANG Jingwen1ZHANG Jingwen
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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ZHANG Feipeng2ZHANG Feipeng

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YANG Xinyu1YANG Xinyu
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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WANG Pan1WANG Pan
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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YANG Zhi1YANG Zhi
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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ZHANG Jiuxing1ZHANG Jiuxing
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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Affiliation: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 (Ca_0.96D_0.04)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 (Ca_0.96D_0.04) MnO₃(D=Sr, Rb, Sm) oxide bulks were prepared. Finally, the phase composition, microstructure and thermoelectric properties of (Ca_0.96D_0.04) 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 (Ca_0.96D_0.04)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 (Ca_0.96D_0.04)MnO₃(D= Sr, Rb, Sm) bulk samples respectively, which are about 1.3~2.2 times higher than that of the un-doped samples.

Key words:CaMnO₃; spark plasma sintering; doping; thermoelectric performance

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[ZHANG Jingwen, ZHANG Feipeng, YANG Xinyu, WANG Pan, YANG Zhi, ZHANG Jiuxing. Preparation and thermoelectric properties of (Ca_0.96D_0.04)MnO₃(D=Ca, Sr, Rb, Sm)[J]. Rare Metal Materials and Engineering,2019,48(2):644~649.]
DOI：10.12442/j. issn.1002-185X.20170591

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Received:July 04,2017
Revised:August 05,2017
Adopted:August 18,2017
Online: March 15,2019
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