Affiliation of Author(s):[1] School of Electronic Science and Engineering, State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China; [2] Yangtze Delta Region Institute [Huzhou], University of Electronic Science and Technology of China, Huzhou, China; [3] School of Materials Science and Engineering, Hainan University, Haikou, China
Journal:Journal of the American Ceramic Society
Key Words:Crystal structure - Lanthanum compounds - Cobalt compounds - Strontium compounds - Temperature - Thick films - Zinc compounds - Calculations - Functional materials - Activation energy - Charge transfer - Testing - Thermal aging
Abstract:This work focuses on the evaluation of La0.5Sr0.5Co1-xZnxO3 (LSCZ, x=0.00–0.10) ceramics as an air-fireable and economical functional material for thick film resistors. Solid-state reaction experiments and first-principles calculations were conducted to investigate the crystal structure, thermal behaviors, and electrical properties of LSCZ ceramics. The substitution of Zn2+ modified the bond properties, electron distribution, and band structure, resulting in more serious structural deformation, increasing the bond population of Co–O and weakening the charge transfer of LSCZ. Experimental results showed that the addition of Zn2+ lowered the densification temperature, activation energy, and crystallite size. As the ratio of Zn2+ increased, the conductivity and temperature coefficient of resistance showed a downward trend. Impedance variation with frequency and thermal aging tests were also performed. For the x=0.05 specimen sintered at 1200°C, values of 95.5% for relative density, 2857 S/cm for conductivity, 1267ppm/°C for temperature coefficient of resistance, –0.47% for conductivity change could be achieved. ? 2021 The American Ceramic Society
Document Type:Journal article (JA)
Volume:105
Issue:4
Page Number:2744-2753
ISSN No.:00027820
Translation or Not:no