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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/74241

    Title: 錫摻雜之高錳矽化物之製備與熱電性質分析;Preparation and Analysis of Thermoelectric Properties of Sn-Doped High Manganese Silicide
    Authors: 洪煜柔;Hung, Yu-Jou
    Contributors: 材料科學與工程研究所
    Keywords: 高錳矽化物;熱電性質;;不匹配相;Higher manganese silicide;Thermoelectric properties;Tin;Incommensurate phase
    Date: 2017-08-25
    Issue Date: 2017-10-27 13:18:28 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 高錳矽化物(HMS)是極具潛力發展為中溫型發電之P型熱電材料。高錳矽化物為一種不匹配相(Incommensurate phase),目前發現的有四種高錳矽化物之相,分別為Mn4Si7、Mn11Si19、Mn15Si26與Mn27Si47,這四種相皆為螺旋階梯狀排列的晶體結構。
    ;Higher manganese silicide (HMS) is considered to be a promising p-type thermoelectric material for use in intermediate-temperature power generation. It is well known that HMS exist as several incommensurable phases such as Mn4Si7, Mn11Si19, Mn15Si26, Mn27Si47, and all of these compounds are Nowotny chimney phases exhibiting tetragonal crystal structure.

    Thermoelectric performance is improved through compositional optimization by doping or substitution. In this work, we prepared polycrytstalline HMS with Sn additions by arc melting and subsequent spark plasma sintering (SPS). The phases, composition, and microstructures of the Sn-doped polycrystalline HMS bulk were investigated. In this study, we select doped-Sn ratio of 0.1at%, 0.5 at%, 1 at%, and 1.5at%. After SPS, we measured the thermoelectric properties of sintered bulk sample from 323K to 773K. We found that the thermal conductivity was significantly improved when the Sn was 0.1at%. The HMS with Sn has the best the ZT is 0.1at%.
    Appears in Collections:[材料科學與工程研究所 ] 博碩士論文

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