Effect of Manganese Dioxide Nanorods on the Thermoelectric Properties of Cement Composites
Ji, Tao1,2; Zhang, Xiaoying3; Zhang, Xiong1; Zhang, Yongjuan1; Li, Weihua1,3
Corresponding AuthorLi, Weihua(
AbstractThe Seebeck coefficient of plain cement paste is usually less than 1V/degrees C. To enhance the thermoelectric performance of cement composites, a kind of MnO2 powder was synthesized and used as a thermoelectric component in this work. The synthesized MnO2 powder was proven to be a kind of effective thermoelectric component in cement paste. The synthesized MnO2 powder possesses a nanorod structure with a diameter of about 50nm and a length up to 1.4m. The measured Seebeck coefficient of the compacted MnO2 powders was about -5,490V/degrees C. The nanorod structured design was proven to be an effective method to increase the Seebeck coefficient of the thermoelectric component in this research. Then the MnO2 nanorods were incorporated into the cement matrix to enhance the thermoelectric effect of cement composites. A relatively high Seebeck coefficient of about -3,085V/degrees C could be obtained when the content of MnO2 powder was 5.0% by weight of cement, which is more than 1,000 times higher than that of the cement paste without MnO2 powder. And at this content, the electrical conductivity, thermal conductivity, and ZT of cement composites were 1.88x10-4S/m, 0.72W/mK, and 7.596x10-7, respectively. The thermoelectric effect of the cement composites is enhanced mainly due to the enhanced Seebeck coefficient, while the influence of electrical conductivity and thermal conductivity caused by MnO2 powders is not as obvious as Seebeck coefficient.
KeywordMnO2 nanorods Seebeck coefficient Cement composites Thermoelectric effect Density of electronic state
Indexed BySCI
Funding ProjectNational Science Foundation of China[51378391] ; National Science Foundation of China[51525903] ; National Key Projects of China[2016YFC0700800] ; Shandong Provincial Key Research and Development Plan[2017GHY15118] ; Nantong Science and Technology Plan[GY12016046]
WOS Research AreaConstruction & Building Technology ; Engineering ; Materials Science
WOS SubjectConstruction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS IDWOS:000439543900015
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi, Weihua
Affiliation1.Tongji Univ, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China
2.China Construct Eighth Engn Div Co Ltd, 1568 Century Ave, Shanghai 200122, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ji, Tao,Zhang, Xiaoying,Zhang, Xiong,et al. Effect of Manganese Dioxide Nanorods on the Thermoelectric Properties of Cement Composites[J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING,2018,30(9):8.
APA Ji, Tao,Zhang, Xiaoying,Zhang, Xiong,Zhang, Yongjuan,&Li, Weihua.(2018).Effect of Manganese Dioxide Nanorods on the Thermoelectric Properties of Cement Composites.JOURNAL OF MATERIALS IN CIVIL ENGINEERING,30(9),8.
MLA Ji, Tao,et al."Effect of Manganese Dioxide Nanorods on the Thermoelectric Properties of Cement Composites".JOURNAL OF MATERIALS IN CIVIL ENGINEERING 30.9(2018):8.
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