本文主要研究内容
作者袁国才,陈曦,黄雨阳,毛俊西,禹劲秋,雷晓波,张勤勇(2019)在《Mg2Si0.3Sn0.7掺杂Ag和Li的热电性能对比》一文中研究指出:采用两步固相法合成了物相均匀的Mg2(1–x)Ag2xSi0.3Sn0.7(x=0,0.01,0.02,0.03,0.04,0.05)和Mg2(1–y)Li2ySi0.3Sn0.7 (y=0, 0.02, 0.04, 0.06, 0.08)热电材料,测试了室温物理性能和室温至773 K的热电性能,研究了不同掺杂剂的固溶度、微观结构、载流子浓度、电性能和热输运. X射线衍射图谱和扫描电子显微镜图像显示掺杂Ag和Li的固溶度分别为x=0.03和y=0.06.根据单抛物线模型, p型的Mg2(1–x)Ag2xSi0.3Sn0.7和Mg2(1–y)Li2ySi0.3Sn0.7的有效质量为1.2m0.对比结果表明:掺杂Ag或Li的最大载流子浓度分别达到4.64×1019 cm–3和15.1×1019 cm–3;掺杂Li元素的样品有较高的固溶度、较高的载流子浓度和较高的功率因子PF约为1.62×10–3W·m–1·K–2;掺杂Li元素样品中较高的载流子浓度能够有效抑制双极效应,显著降低双极热导率; Mg1.92Li0.08Si0.3Sn0.7的最大ZT值0.54,比Mg1.9Ag0.1Si0.3Sn0.7的最大ZT值0.34提高了大约58%.根据Callaway理论,由于质量场波动和应变场波动增强声子散射,掺杂Ag和Li元素样品的晶格热导率比未掺杂样品明显降低.
Abstract
cai yong liang bu gu xiang fa ge cheng le wu xiang jun yun de Mg2(1–x)Ag2xSi0.3Sn0.7(x=0,0.01,0.02,0.03,0.04,0.05)he Mg2(1–y)Li2ySi0.3Sn0.7 (y=0, 0.02, 0.04, 0.06, 0.08)re dian cai liao ,ce shi le shi wen wu li xing neng he shi wen zhi 773 Kde re dian xing neng ,yan jiu le bu tong can za ji de gu rong du 、wei guan jie gou 、zai liu zi nong du 、dian xing neng he re shu yun . Xshe xian yan she tu pu he sao miao dian zi xian wei jing tu xiang xian shi can za Aghe Lide gu rong du fen bie wei x=0.03he y=0.06.gen ju chan pao wu xian mo xing , pxing de Mg2(1–x)Ag2xSi0.3Sn0.7he Mg2(1–y)Li2ySi0.3Sn0.7de you xiao zhi liang wei 1.2m0.dui bi jie guo biao ming :can za Aghuo Lide zui da zai liu zi nong du fen bie da dao 4.64×1019 cm–3he 15.1×1019 cm–3;can za Liyuan su de yang pin you jiao gao de gu rong du 、jiao gao de zai liu zi nong du he jiao gao de gong lv yin zi PFyao wei 1.62×10–3W·m–1·K–2;can za Liyuan su yang pin zhong jiao gao de zai liu zi nong du neng gou you xiao yi zhi shuang ji xiao ying ,xian zhe jiang di shuang ji re dao lv ; Mg1.92Li0.08Si0.3Sn0.7de zui da ZTzhi 0.54,bi Mg1.9Ag0.1Si0.3Sn0.7de zui da ZTzhi 0.34di gao le da yao 58%.gen ju Callawayli lun ,you yu zhi liang chang bo dong he ying bian chang bo dong zeng jiang sheng zi san she ,can za Aghe Liyuan su yang pin de jing ge re dao lv bi wei can za yang pin ming xian jiang di .
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论文详细介绍
论文作者分别是来自物理学报的袁国才,陈曦,黄雨阳,毛俊西,禹劲秋,雷晓波,张勤勇,发表于刊物物理学报2019年11期论文,是一篇关于热电性能论文,掺杂论文,晶格热导率论文,物理学报2019年11期论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自物理学报2019年11期论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:热电性能论文; 掺杂论文; 晶格热导率论文; 物理学报2019年11期论文;