Zobrazeno 1 - 10
of 275
pro vyhledávání: '"Shinichi Kikkawa"'
Publikováno v:
Journal of the European Ceramic Society. 40:6288-6292
The thermal stability of oxynitride perovskites is very important for the fabrication of their dense ceramics. In this study, a solid solution of the oxynitride perovskite Sr1-xLaxTa1-xTixO2N was prepared via the ammonia nitridation of oxide precurso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f50b822a78df4a1a22657366a96fddf5
https://doi.org/10.1016/j.jeurceramsoc.2019.10.004
https://doi.org/10.1016/j.jeurceramsoc.2019.10.004
Autor:
Michiaki Iha, Mikio Higuchi, Shinichi Kikkawa, Masashi Inoguchi, Koji Murayama, Akira Hosono, Yuji Masubuchi
Publikováno v:
Journal of the European Ceramic Society. 40:2317-2322
The perovskite-type oxynitride BaTaO2N is a promising lead-free relaxor ferroelectric material. However, this material releases a part of its nitrogen during its sintering above 1350 °C. Subsequent annealing of the resulting sintered BaTaO2N0.85 cer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8fe8c8c470f437b9618b9ec7821e0d2
https://doi.org/10.1016/j.jeurceramsoc.2020.02.008
https://doi.org/10.1016/j.jeurceramsoc.2020.02.008
Publikováno v:
Journal of Alloys and Compounds. 803:678-683
The effect of crystal structural defects on superconductivity was investigated in two types of rock salt-type niobium oxynitride structures, (Nb0·87Si0.09□0.04) (N0·87O0.13) and Nb4(N,O)5. The first oxynitride had been reported to have an enhance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::961f6e6d85a1c2a07370f71a995b5cd8
https://doi.org/10.1016/j.jallcom.2019.06.320
https://doi.org/10.1016/j.jallcom.2019.06.320
Autor:
Masayuki Tsuchiya, Yoshiyuki Matsumoto, Shinichi Kikkawa, Yoshiyuki Nakazawa, Hitoshi Itami, Yuji Masubuchi
Publikováno v:
Journal of Alloys and Compounds. 789:697-703
The soft magnetic properties of α-Fe fine powders were investigated before and after low temperature ammonolysis together with the effect of alumina presence in the grain boundaries to clarify the contribution of these during the preparation process
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce20eafce6db9e7f9a26faa9d83dd3a2
https://doi.org/10.1016/j.jallcom.2019.03.061
https://doi.org/10.1016/j.jallcom.2019.03.061
Publikováno v:
Materials Research Bulletin. 106:124-130
Although α″-Fe 16 N 2 -like compounds exhibit enhanced magnetization compared to α-Fe, it is important to increase their magnetic coercivity to obtain new hard magnetic materials for electric vehicle application. In the present work, coarse FePt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09c079ce68500d1f9f28cccf779ebc4d
https://doi.org/10.1016/j.materresbull.2018.06.001
https://doi.org/10.1016/j.materresbull.2018.06.001
Autor:
Shinichi Kikkawa, Yuji Masubuchi
Publikováno v:
Progress in Solid State Chemistry. 51:19-26
Strong ferromagnetic materials at room temperature are of interest for various magnetic applications such as magnetic recording, sensors, and motors. Gigantic magnetism expected for α″-Fe 16 N 2 thin films had been attracted much attention in term
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b0ef9378367d7da4b337e1a31b4dc98
https://doi.org/10.1016/j.progsolidstchem.2017.06.001
https://doi.org/10.1016/j.progsolidstchem.2017.06.001
Publikováno v:
Progress in Solid State Chemistry. 51:71-80
Compounds that contain two types of anion are attracting attention as a new field of solid state chemistry. The nitride anion is similar to the oxide anion in size and nature. They coordinate together to cations in oxynitrides to form characteristic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bfb291319fd011fa976aa0536db20c9
https://doi.org/10.1016/j.progsolidstchem.2017.08.001
https://doi.org/10.1016/j.progsolidstchem.2017.08.001
Publikováno v:
Journal of the European Ceramic Society. 38:3478-3482
Piezoresponse force microscopy was conducted on a polished slice of the perovskite oxynitride ceramic BaTaO2N after ammonolysis at a bias voltage of ± 10 V. The ceramic surface was relatively porous because it was readily hydrolyzed by ambient humid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30f99baaaddc96966e67101942353025
https://doi.org/10.1016/j.jeurceramsoc.2018.04.001
https://doi.org/10.1016/j.jeurceramsoc.2018.04.001
Autor:
Yuji Masubuchi, Shinichi Kikkawa, Yuya Suemoto, Atsuo Matsutani, Yuki Nagamine, Yamazaki Kumiko, Takeshi Shibahara
Publikováno v:
Inorganic Chemistry. 57:9086-9095
Strontium tantalum oxynitrides were prepared within the nominal composition range of 1.0 ≤ x ≤ 2.0, where x = Sr/Ta atomic ratio. A gradual structural transition was observed between the perovskite SrTaO2N and the Ruddlesden–Popper phase Sr2TaO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35395699d4a92d0a9fc1eb232d8130d8
https://doi.org/10.1021/acs.inorgchem.8b01079
https://doi.org/10.1021/acs.inorgchem.8b01079
Autor:
Shinichi Kikkawa, Akira Hosono, Hisanori Yamane, Mikio Higuchi, Yuuki Kitagawa, Jumpei Ueda, Setsuhisa Tanabe, Sayaka Nishitani, Yuji Masubuchi
Publikováno v:
Journal of Materials Chemistry C. 6:6370-6377
A new polymorph of BaCN2 was obtained via a simple nitridation reaction of BaCO3 under an NH3 flow at 900 °C. The product was analyzed via single crystal X-ray diffraction and infrared spectroscopy, and it was found to have a tetragonal I4/mcm cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecce63d4b38fa6e0ca45d993bc524890
https://doi.org/10.1039/c8tc01289j
https://doi.org/10.1039/c8tc01289j