Open AccessDependence of mechanical and electrical properties on crystal orientation of CuCr0.95Mg0.05O2 ceramics
Author(s) -
Dung Van Hoang,
Anh Tuấn Thanh Phạm,
Thu Hien Nguyen,
Dai Cao Truong,
Ngoc Kim Pham,
Hanh Kieu Thi Ta,
Tung Le,
Vinh Cao Trần,
Thắng Bách Phan
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2013/1/012008
Subject(s) - delafossite , materials science , seebeck coefficient , crystallite , sintering , spinel , electrical resistivity and conductivity , thermoelectric effect , vickers hardness test , doping , phase (matter) , ceramic , analytical chemistry (journal) , thermoelectric materials , metallurgy , mineralogy , condensed matter physics , composite material , thermal conductivity , microstructure , thermodynamics , chemistry , physics , optoelectronics , organic chemistry , chromatography , electrical engineering , engineering , oxide
Mg-doped CuCrO 2 material has emerged as a p-type semiconductor, especially, in the field of thermoelectric materials because of its lowest resistivity in delafossite material family. In this work, CuCr 0.95 Mg 0.05 O 2 bulk materials were prepared in a series of sintering temperatures including 1000, 1200, and 1400°C using solid-state reaction method. From XRD results, all samples exhibit the significant existence of delafossite phase CuCrO 2 , and a small portion belongs to the spinel phase MgCr 2 O 4 . An interesting finding in this study is that the Vickers hardness is mainly governed by the crystallite size of (110) plane. Besides, the change in the crystallite size of (110) plane also indirectly affects the carrier concentration of the compounds with increasing sintering temperature. The highest power factor (PF) was reached for the sample prepared at the sintering temperature 1400°C with the value of 193 μW/mK 2 along with the Seebeck coefficient value of 600 μV/K measured at 400°C.