PPP Addition to Improve Thermoelectric Properties of ZnO-based Thermoelectric Composites

被引：0
|
作者：
Wu Zi-Hua [1 ]
Xie Hua-Qing [1 ]
Wang Yuan-Yuan [1 ]
Mao Jian-Hui [1 ]
Xing Jiao-Jiao [1 ]
Li Yi-Huai [1 ]
机构：
[1] Shanghai Polytech Univ, Coll Engn, Sch Environm & Mat Engn, Shanghai 201209, Peoples R China
来源：
JOURNAL OF INORGANIC MATERIALS | 2016年 / 31卷 / 11期
关键词：
ZnO; thermoelectric property; Sol-Gel; molecular junction; NANOCOMPOSITES;
D O I：
10.15541/jim20160118
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
PPP@Zn1-xCoxO (x=0, 0.025) nanocomposites were prepared by Sol -Gel method, then bulk samples were prepared by spark plasma sintering. And thermoelectric properties of the samples were studied. Transmission electron microscopy (TEM) observations indicate that PPP nanoparticles are smaller than 200 nm. With the increase of PPP content, Seebeck coefficient gradually increases at first and then decreases, while electric conductivity increases quickly. Compared with ZnO bulk samples, the thermal conductivity of PPP@Zn1-xCoxO nanocomposite is decreased. The thermal conductivity of 9wt% PPP@Zn0.975Co0.025O is decreased to 5.4 W/(m.K) at 640 K. The increase of electrical conductivity and the decrease of thermal conductivity resulted in a great increase in the value of thermoelectric properties. 9wt% PPP@Zn0.975Co0.025O has a maximal ZT value of 0.16 at 870 K, which is 8 times of that of Zn0.975Co0.025O bulk material.
引用
收藏
页码：1249 / 1254
页数：6
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