Growth mechanism and thermoelectric properties of β-FeSi2 matrix with Si nanowires

被引：3
|
作者：
Qu, Xiurong [1 ]
Jia, Dechang [2 ]
Hu, Jianmin [1 ]
Lu, Shuchen [1 ]
机构：
[1] Harbin Normal Univ, Heilongjiang Key Lab Low Dimens Syst & Mesoscop P, Sch Phys & Elect Engn, Harbin 150025, Peoples R China
[2] Harbin Inst Technol, Inst Adv Ceram, Harbin 150080, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2011年 / 176卷 / 16期
关键词：
Si nanowires; beta-FeSi2; Thermoelectric performance; Growth mechanism; SILICON NANOWIRES; POWER;
D O I：
10.1016/j.mseb.2011.07.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel composite material consisted of beta-Fesi(2) and in situ formed Si nanowires (siNWs) with the diameter of 50-120 nm, is prepared by mechanical alloying and annealing process. The effects of ball-milling time on the formation of SiNWs are investigated systematically. The growth way of SiNWs is named as autocatalytic growth, in which no catalyst is intentionally added to the system. The possible formation mechanisms of SiNWs are discussed in detail. Due to the increase of boundary scattering, the thermal conductivity of the composite sample with SiNWs decrease significantly. Thus, the composite sample shows excellent thermoelectric performance. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1291 / 1296
页数：6
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