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Hyunwook Nam
Hyunwook Nam
Verified email at rs.tus.ac.jp
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Structural and electrical characteristics of potential candidate lead-free BiFeO3-BaTiO3 piezoelectric ceramics
S Kim, GP Khanal, HW Nam, I Fujii, S Ueno, C Moriyoshi, Y Kuroiwa, ...
Journal of Applied Physics 122 (16), 2017
1132017
Influence of quenching temperature on piezoelectric and ferroelectrics properties in BaTiO3-Bi (Mg1/2Ti1/2) O3-BiFeO3 ceramics
H Nam, S Kim, T Aizawa, I Fujii, S Ueno, S Wada
Ceramics International 44, S199-S202, 2018
352018
In-situ electric field induced lattice strain response observation in BiFeO3–BaTiO3 lead-free piezoelectric ceramics
S Kim, GP Khanal, HW Nam, M Kim, I Fujii, S Ueno, C Moriyoshi, ...
Journal of the Ceramic Society of Japan 126 (5), 316-320, 2018
192018
A-site cation off-centering contribution on ferroelectricity and piezoelectricity in pseudo-cubic perovskite structure of Bi-based lead-free piezoelectrics
S Kim, H Nam, I Fujii, S Ueno, C Moriyoshi, Y Kuroiwa, S Wada
Scripta Materialia 205, 114176, 2021
122021
Lead-Free BiFeO3-Based Piezoelectrics: A Review of Controversial Issues and Current Research State
S Kim, H Nam, I Calisir
Materials 15 (13), 4388, 2022
102022
Thermal annealing induced recovery of damaged surface layer for enhanced ferroelectricity in Bi-based ceramics
H Nam, S Kim, GP Khanal, I Fujii, S Ueno, S Wada
Japanese Journal of Applied Physics 58 (SL), SLLD04, 2019
102019
Effects of AC-and DC-bias field poling on piezoelectric properties of Bi-based ceramics
S Kim, GP Khanal, H Nam, I Fujii, S Ueno, S Wada
Journal of the Ceramic Society of Japan 127 (6), 353-356, 2019
102019
Piezoelectric Actuation Mechanism Involving Extrinsic Nanodomain Dynamics in Lead‐Free Piezoelectrics
S Kim, R Miyauchi, Y Sato, H Nam, I Fujii, S Ueno, Y Kuroiwa, S Wada
Advanced Materials 35 (11), 2208717, 2023
92023
Effect of A-site off-stoichiometry on ferroelectric and piezoelectric properties of BaTiO3–Bi (Mg1/2Ti1/2) O3–BiFeO3 ceramics
H Nam, I Fujii, S Kim, T Aizawa, S Ueno, S Wada
Journal of the Ceramic Society of Japan 127 (6), 369-373, 2019
82019
Material softening by cation off-centering in Bi-based lead-free piezoelectric ceramics
S Kim, H Nam, I FUJII, U Shintaro, C Moriyoshi, Y Kuroiwa, S Wada
Japanese Journal of Applied Physics, 2021
72021
Variation of leakage current conduction mechanism by heat treatment in Bi-based lead-free piezoelectric ceramics
S Kim, H Nam, P Sapkota, GP Khanal, I Fujii, S Ueno, S Wada
Journal of Applied Physics 129 (9), 2021
62021
Composition dependence of structural and piezoelectric properties in Bi (Mg0. 5Ti0. 5) O3-modified BaTiO3-BiFeO3 ceramics
H Nam, I Fujii, S Kim, T Ishii, S Ueno, GP Khanal, Y Kuroiwa, S Wada
Japanese Journal of Applied Physics 61 (SN), SN1033, 2022
52022
Gravity-induced structural deformation for enhanced ferroelectric performance in lead-free piezoelectric ceramics
S Kim, H Nam, JU Rahman, P Sapkota
Scripta Materialia 244, 116021, 2024
2024
Fabrication of< 100>-oriented Bi (Mg0. 5Ti0. 5) O3-modified BiFeO3-BaTiO3 ceramics and their piezoelectric properties
H Nam, I Fujii, S Nakagawa, S Ueno, S Wada
Japanese Journal of Applied Physics 62 (SM), SM1002, 2023
2023
Solvothermal synthesis of dispersible homogeneous KNbO3 nanocubes from K4Nb6O17 microsheets
Y Yamada, P Sapkota, H Nam, E Yamaga, R Kunisada, T Takei, ...
Journal of the Ceramic Society of Japan 131 (7), 306-312, 2023
2023
Material design direction using materials softening for high performance piezoelectric ceramics
S Kim, GP Khanal, H Nam, I Fujii, S Ueno, C Moriyoshi, Y Kuroiwa, ...
JSAP Annual Meetings Extended Abstracts The 66th JSAP Spring Meeting 2019 …, 2019
2019
Development of BaTiO3-Bi (Mg1/2Ti1/2) O3-BiFeO3 ceramics by various ceramic processing for enhanced piezoelectric properties
HW Nam, I Fujii, S Kim, T Aizawa, S Ueno, S Wada
JSAP Annual Meetings Extended Abstracts The 66th JSAP Spring Meeting 2019 …, 2019
2019
Effect of Post-annealing temperature and time in BaTiO3-Bi (Mg1/2Ti1/2) O3-BiFeO3 piezoelectric ceramics
HW Nam, T Aizawa, S Kim, I Fujii, S Ueno, S Wada
JSAP Annual Meetings Extended Abstracts The 79th JSAP Autumn Meeting 2018 …, 2018
2018
Relationship between crystal strcuture and material softening in BiFeO3-BaTiO3 lead-free piezoelectric ceramics
S Kim, GP Khanal, HW Nam, I Fujii, S Ueno, C Moriyoshi, Y Kuroiwa, ...
JSAP Annual Meetings Extended Abstracts The 79th JSAP Autumn Meeting 2018 …, 2018
2018
Post-annealing and quenching effect on electrical property in BaTiO3-Bi (Mg1/2Ti1/2) O3-BiFeO3 piezoelectric ceramic
HW Nam, T Aizawa, S Kim, I Fujii, S Ueno, S Wada
JSAP Annual Meetings Extended Abstracts The 65th JSAP Spring Meeting 2018 …, 2018
2018
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