Antioxidation and thermoelectric properties of ZnO nanoparticles-coated beta-FeSi2

作者：Qu, Xiurong^*; Wang, Wen; Liu, Wei; Yang, Zhihua; Duan, Xiaoming; Jia, Dechang

来源：Materials Chemistry and Physics, 2011, 129(1-2): 331-336.

DOI：10.1016/j.matchemphys.2011.04.022

• beta-FeSi2 semiconductors
• ZnO nanoparticles-coating
• Thermoelectric effects
• Oxidation

Surface modification of beta-FeSi2 by ZnO is verified to be an effective way to prevent oxidation and enhance thermoelectric (TE) properties of beta-FeSi2. A simple approach is developed to fabricate well-covered, high-density and stable ZnO nanoparticles-coated beta-FeSi2 (ZnO@beta-FeSi2). First, beta-FeSi2 (n-type Fe0.98Co0.02Si2) particles were prepared by mechanical alloying (MA) and pre-treated in sodium oleate solution to increase the polarity of the surface. Then, the pre-treated beta-FeSi2 particles were successfully coated by ZnO nanoparticles during sol-gel process. Compared with that of uncoated beta-FeSi2, antioxidation and thermoelectric performance of ZnO@beta-FeSi2 materials is improved distinctly.

• 出版日期2011-9-15
• 单位哈尔滨师范大学; 哈尔滨工业大学