TY - JOUR
T1 - Remarkably improved electrical conductivity of ZnO ceramics by cold sintering and post-heat-treatment
AU - Jing, Yang
AU - Luo, Nengneng
AU - Wu, Shaohai
AU - Han, Kai
AU - Wang, Xinpeng
AU - Miao, Lei
AU - Wei, Yuezhou
N1 - Funding Information:
This work was supported by Guangxi Natural Science Foundation ( 2017GXNSFBA198132 ), Science and Technology Major Project of Guangxi ( AA17204100 ), and the funds of the State Key Laboratory of New Ceramics and Fine Processing ( KF201710 ), Tsinghua University, Beijing 100084, China.
Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2018/11
Y1 - 2018/11
N2 - High quality ZnO ceramics are required for transparent conductive oxide (TCO) films. In this work, high dense ZnO ceramics with density of ~ 97.5% were sintered by using Cold Sintering Process (CSP), and various post-heat-treating conditions (different types of atmosphere and temperature) were applied to optimize the microstructure and electrical conductivity. After post-heat-treatment, the crystallinity was improved, the relative density increased to > 99.0%, while the grain size exhibited small variations. The most significant improvements in electrical conductivity were observed for the sample post-heat-treated in Ar atmosphere, with more than four orders of enhancement from 0.0005 S/cm for the as-cold-sintered one to a maximum of 16.4 S/cm after post-heat-treating at 500 °C. Our work demonstrated an effective method for preparing high performance ZnO ceramics at ultralow temperature.
AB - High quality ZnO ceramics are required for transparent conductive oxide (TCO) films. In this work, high dense ZnO ceramics with density of ~ 97.5% were sintered by using Cold Sintering Process (CSP), and various post-heat-treating conditions (different types of atmosphere and temperature) were applied to optimize the microstructure and electrical conductivity. After post-heat-treatment, the crystallinity was improved, the relative density increased to > 99.0%, while the grain size exhibited small variations. The most significant improvements in electrical conductivity were observed for the sample post-heat-treated in Ar atmosphere, with more than four orders of enhancement from 0.0005 S/cm for the as-cold-sintered one to a maximum of 16.4 S/cm after post-heat-treating at 500 °C. Our work demonstrated an effective method for preparing high performance ZnO ceramics at ultralow temperature.
KW - Cold sintering process
KW - Electrical conductivity
KW - Heat-treatment
KW - ZnO
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U2 - 10.1016/j.ceramint.2018.07.192
DO - 10.1016/j.ceramint.2018.07.192
M3 - Article
AN - SCOPUS:85050298425
SN - 0272-8842
VL - 44
SP - 20570
EP - 20574
JO - Ceramics International
JF - Ceramics International
IS - 16
ER -