| Home | E-Submission | Sitemap | Login | Contact Us |  
top_img
J. Korean Ceram. Soc. > Volume 61(5); 2024 > Article
Journal of the Korean Ceramic Society 2024;61(5): 918-927.
doi: https://doi.org/10.1007/s43207-024-00410-z
Electrical properties of  AgNbO3 thick films by aerosol deposition followed by post-annealing in oxygen atmosphere
Geon Lee1, Tek Kyoung Sung1,2, Hyunseok Song1, Jungho Ryu1,3
1School of Materials Science and Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
2TaeguTec, Dalseong, Daegu 42936, Republic of Korea
3Institute of Materials Technology, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
Correspondence  Jungho Ryu ,Email: jhryu@ynu.ac.kr
Received: December 7, 2023; Revised: April 15, 2024   Accepted: May 13, 2024.  Published online: May 27, 2024.
ABSTRACT
Dielectric capacitors, distinguished by their exceptional power densities, make them suitable for unique applications that demand swift energy charging and discharging, as typified by pulse power utilities, power regulation, and vehicular systems. However, a notable limitation of dielectric capacitors is their relatively low recoverable energy density. In this study, we focused on the electrical and dielectric properties of silver niobate (AgNbO3) anti-ferroelectric (AFE) ceramics—a lead-free alternative gaining traction in power electronics and energy storage devices. Considering the marked hysteresis loss characteristic of typical  AgNbO3 AFE ceramics, we developed an innovative aerosol deposition (AD) technique to overcome this limitation. Considering AgNbO3 tends to generate oxygen vacancies during fabrication—a phenomenon known to significantly influence its electrical properties—annealing in a flowing oxygen atmosphere is deemed crucial. Notably, the AgNbO3 thick film annealed at a temperature of 800 °C for 6 h exhibited ferroelectric-like behavior and enhanced dielectric breakdown strength (DBS) of 1100 kV/cm, surpassing the bulk ceramic benchmark by approximately five times.
Key words: AgNbO3 · Energy-storage capacitor  · Anti-ferroelectric  · Aerosol deposition  · Oxygen vacancy
Editorial Office
Meorijae Bldg., Suite # 403, 76, Bangbae-ro, Seocho-gu, Seoul 06704, Korea
TEL: +82-2-584-0185   FAX: +82-2-586-4582   E-mail: ceramic@kcers.or.kr
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © The Korean Ceramic Society.                      Developed in M2PI