公开(公告)号：US20180185923A1

公开(公告)日：2018-07-05

申请号：US15862606

申请日：2018-01-04

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Chao WANG ,  Yi NIU ,  Jing JIANG ,  Yide CHEN ,  Junfeng XIA ,  Rui ZHANG ,  Ting ZHOU ,  Hanqing TIAN

IPC: B22F9/04 ,  B22F3/105 ,  B22F3/14 ,  H01L35/16 ,  C01G49/12 ,  B22F1/00

CPC classification number: B22F9/04 ,  B22F1/0085 ,  B22F3/105 ,  B22F3/14 ,  B22F2003/145 ,  B22F2203/11 ,  B22F2301/35 ,  B22F2998/10 ,  C01G49/12 ,  C01P2002/72 ,  C01P2006/40 ,  H01L35/16

Abstract: A method of preparing a thermoelectric material comprising an iron-sulfur compound, the method including: 1) weighing, grinding, and mixing an iron salt and a sulfur-containing source to obtain a mixed powder; 2) carrying out a hydrothermal reaction with the mixed powder to obtain a black precipitate; 3) washing the precipitate; 4) drying the precipitate under vacuum to obtain FeS2 powder; 5) annealing the FeS2 powder under inert atmosphere to obtain annealed powder, where a heating temperature is from 300° C. to 1000° C., a heating time is from 2 hours to 24 hours, and a flow rate of an inert gas is from 30 mL/min to 200 mL/min; and 6) sintering the annealed powder to obtain a thermoelectric material including an iron-sulfur compound.