Cold sintering ZnO based varistor ceramics with controlled grain growth to realize superior breakdown electric field
نویسندگان
چکیده
Controlling the grain growth and boundary morphology is of great importance in manipulation electrical properties electro-ceramics. However, it has been a challenge to achieve dense varistor ceramics with sizes submicrons nanometers using conventional thermal sintering at high temperatures. Here we present strategy fabricate ZnO based controlled thin boundaries cold process (CSP). With CSP, temperature dramatically drops from 1100 °C 300 °C. The Bi2O3, Mn2O3, CoO dopants suppress under CSP conditions, Bi-rich intergranular films (2?5 nm) can be observed along boundaries. sintered ZnO-Bi2O3-Mn2O3-CoO ceramic shows non-linear coefficient 33.5, superior breakdown electric field 3550 V/mm. This work thus demonstrates that promising technique for designing new submicron-/nano-ceramics performances.
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ژورنال
عنوان ژورنال: Journal of The European Ceramic Society
سال: 2021
ISSN: ['0955-2219', '1873-619X']
DOI: https://doi.org/10.1016/j.jeurceramsoc.2020.09.023