論文 - 山本 剛久
-
Microstructure analysis for zirconium oxynitrides formed in 8 mol% yttria-doped zirconia by a flash event under a direct current electric field in an ambient atmosphere 査読有り
S. Sakamoto, A. Kodaira, T. Tokunaga, N. Morisaki, K. Kobayashi, T. Yamamoto
Journal of the European Ceramic Society 45 巻 ( 7 ) 頁: 117265 2025年7月
-
Healing behavior of microcracks on the surface of yttria-stabilized polycrystals using an ultrafast high-temperature sintering method 査読有り
T. Sato, A. Kodaira, T. Tokunaga, K. Morita, T. Yamamoto
Ceramics International 51 巻 ( 4 ) 頁: 4178 - 4184 2025年2月
-
Spectrally Narrow Blue-Light Emission from Nonstoichiometric AgGaS2 Quantum Dots for Application to Light-Emitting Diodes 招待有り 査読有り
M. Tozawa, S. Ofuji, M. Tanaka, K. Akiyoshi, T. Kameyama, T. Yamamoto, G. Motomura, Y. Fujisaki, T. Uematsu, S. Kuwabata, T. Torimoto
ACS Applied Materials and Interfaces 16 巻 頁: 68169 - 68180 2024年11月
-
Variation of (001) surface structures of strontium titanate single crystals caused by flash event under direct/alternative current electric fields 査読有り
Y. Katsuyama, S. Kayukawa, T. Tokunaga, S. Kobayashi, S. Hidaka, A. Nakamura, T. Yamamoto
Ceramics International 50 巻 頁: 37366 - 37372 2024年10月
-
Microstructural analysis of flash-healed Vickers-indented microcracks near positive/negative electrodes on the (001) surface of cubic zirconia single crystals under direct current electric fields 査読有り
S. Kayukawa, Y. Katsuyama, A. Kodaira, T. Tokunaga, K. Morita, T. Yamamoto
Ceramics International 50 巻 頁: 37348 - 37355 2024年10月
-
Highly c-axis-oriented apatite-type lanthanum silicate thin films fabricated by magnetron sputtering under bias 査読有り
S. Hidaka, K. Takagi, T. Yamamoto
Materials Chemistry and Physics 326 巻 頁: 129852 2024年8月
-
Variation of surface morphology of material uplift near flash-healed Vickers indents under direct-current electric field in cubic zirconia single crystals 査読有り
S. Kayukawa, Y. Katsuyama, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 8 ) 頁: 528 - 531 2024年8月
-
Pulsed laser deposition and structural analysis of Ba2Ti6O13 epitaxial thin film on the (210) surface of SrTiO3 single crystal 査読有り
R. Kono, K. Hieda, T. Tokunaga, R. Tamura, R. Masamura, Y. Hikita, K. Kano, T. Yamamoto
Applied Physics Express 17 巻 頁: 075503 2024年7月
-
The use of He buffer gas for moderating the plume kinetic energy during Nd:YAG-PLD growth of EuXY2-XO3 phosphor films 査読有り
S. Suzuki, T. Dazai, T. Tokunaga, T. Yamamoto, R. Katoh, M. Lippmaa, R. Takahashi
Journal of Applied Physics 135 巻 頁: 195302 2024年5月
-
Topographical and morphological changes of the single-crystal (La0.3Sr0.7)(Al0.65Ta0.35)O3 (001) surface treated with high-purity deionized water 査読有り
Y. Tokuda, N. Nishikawa, T. Irimoto, Y. Katsuyama, S. Kobayashi, T. Tokunaga, T. Yamamoto
Surface and Interface Analysis 56 巻 ( 8 ) 頁: 564 - 572 2024年4月
-
Optical and mechanical properties of rutile TiO2 subjected to AC flash processing 査読有り
Hiroshi Masuda, Tomoharu Tokunaga, Takahisa Yamamoto, Hidehiro Yoshida
Scripta Materialia 246 巻 頁: 116088 2024年3月
-
Non-uniformity of shrinkage rate as a function of current acceleration during flash event under voltage-to-current protocol in 8 mol %Y2O3-ZrO2 査読有り
M. Seko, S. Inagaki, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 3 ) 頁: 93 - 98 2024年3月
-
Variation of grain boundary dihedral angles caused by voltage-to-current-based flash treatment in fully stabilized yttria-doped zirconia polycrystals 査読有り
M. Seko, S. Kayukawa, S. Inagaki, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 2 ) 頁: 63 - 67 2024年2月
-
Applying an alternating current to strontium titanate minimizes the change in oxidation state caused by flash sintering 査読有り
M. Seko, S. Inagaki, T. Tokunaga, S. Kobayashi, A. Nakamura, T. Yamamoto
Journal of the European Ceramic Society 44 巻 頁: 2965 - 2971 2023年12月
-
One-pot synthesis of Ag–In–Ga–S nanocrystals embedded in a Ga2O3 matrix and enhancement of band-edge emission by Na+ doping 査読有り
M. Tozawa, C. Miyamae, K. Akiyoshi, T. Kameyama, T. Yamamoto, G. Motomura, Y. Fujisaki, T. Uematsu, S. Kuwabata, T. Torimoto
Nanoscale Advances 5 巻 頁: 7057 - 7066 2023年11月
-
Near-full compaction within only 30 min of total sintering time by shrinkage-rate-controlled flash sintering in 3 mol% Y2O3-doped ZrO2 polycrystal 査読有り
Yuki ISHINO, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Journal of the Ceramic Society of Japan 131 巻 ( 10 ) 2023年10月
-
Improvements in Flash Sintering for Practical Application 査読有り
Takahisa YAMAMOTO
Materials Transactions 64 巻 ( 9 ) 頁: 2059 - 2068 2023年9月
-
StructuralDefectEffecton the ConcentrationQuenchingofTbxY2−xO3PhosphorThin Films 査読有り
Shizuka Suzuki, Takuro Dazai, Tomoharu Tokunaga, Takahisa Yamamoto, Ryuzi Katoh, Ryota Takahashi
J. Phys.Chem.C 127 巻 頁: 9380 - 9387 2023年9月
-
Apparent Sintering Activation Energy Estimated by Master Sintering Curves for 8 mol% Y2O3 Doped ZrO2 Polycrystals during Shrinkage-Rate Controlled Flash Sintering 査読有り
Masao KOIKE, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Materials Transactions 64 巻 ( 9 ) 頁: 2315 - 2320 2023年9月
-
Hydrogarnet-Derived Porous Polyhedral Particles of SrFeO3-δ Perovskite 査読有り
H. Otaguro, T. Takeno, R. Sugimoto, S. Hosokawa, H. Akamatsu, T. Yamamoto, K. Nakanishi, K. Hayashi, G. Hasegawa
Chemistry Materials 35 巻 頁: 6423 - 6436 2023年8月