Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Kazuhisa Kurashige"'
Autor:
Takeshi Mitani, Tetsuo Takahashi, Toru Ujihara, Kazuhisa Kurashige, Yuji Matsumoto, Tomohisa Kato, Shunta Harada, Hajime Okumura, Naoyoshi Komatsu
Publikováno v:
Journal of Crystal Growth. 423:45-49
For the solution growth of 4H–SiC with Si 1− x Cr x solvents, the change in surface step structure by 4 at% Al addition to the solvent was investigated. Without Al addition, step bunching resulted in the formation of giant macrosteps with height
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5337fc771ea2f56bd29aacfac243e385
https://doi.org/10.1016/j.jcrysgro.2015.04.032
https://doi.org/10.1016/j.jcrysgro.2015.04.032
Autor:
Takeshi Mitani, Tomohisa Kato, Naoyoshi Komatsu, Hajime Okumura, Tetsuo Takahashi, Yuji Matsumoto, Toru Ujihara, Kazuhisa Kurashige
Publikováno v:
Materials Science Forum. :14-17
In solution growth of 4H-SiC, we have investigated changes in macrostep height with addition of the Group III (B, Al, Ga), Group IV (Ge, Sn), Group V (N) elements, and transition metals (Ti, V, Cr, Ni) to Si solvents, in order to find additives impro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebffa074b544159487a726faa3f7f2de
https://doi.org/10.4028/www.scientific.net/msf.821-823.14
https://doi.org/10.4028/www.scientific.net/msf.821-823.14
Autor:
Fujii Kuniharu, N. Senguttuvan, Koichi Takei, Hajime Okumura, Tomohisa Kato, Masahiko Hiratani, Masahiro Aoshima, Yuji Matsumoto, Kazuhisa Kurashige, Toru Ujihara
Publikováno v:
Materials Science Forum. :35-38
The influences of solution flow and lateral temperature distribution on the surface morphology of the 4H-SiC single crystal grown from solution was investigated. A flat surface region was enlarged by the seed-rotation rate. The solution flow simulati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee48e62f5b431615bc19c32b9dad7223
https://doi.org/10.4028/www.scientific.net/msf.821-823.35
https://doi.org/10.4028/www.scientific.net/msf.821-823.35
Autor:
Hajime Okumura, Takeshi Mitani, Tetsuo Takahashi, Tomohisa Kato, Yuji Matsumoto, Kazuhisa Kurashige, Toru Ujihara, Naoyoshi Komatsu
Publikováno v:
Materials Science Forum. :9-13
We have investigated the solution growth under various Al-N co-doping conditions. Both p-type and n-type 4H-SiC were successfully grown under Al-N co-doping conditions, while using the effect of Al-addition to stabilize both growth surface and polyty
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d2c49d8406526e174c6e1828da8a760
https://doi.org/10.4028/www.scientific.net/msf.821-823.9
https://doi.org/10.4028/www.scientific.net/msf.821-823.9
Autor:
Masahiro Aoshima, Tomohisa Kato, N. Senguttuvan, Yuji Matsumoto, Koichi Takei, Toru Ujihara, Kazuhisa Kurashige, Masahiko Hiratani, Fujii Kuniharu, Hajime Okumura
Publikováno v:
Materials Science Forum. :22-25
In this paper, we will discuss how to cope with the smoother growth front and higher growth rate by the forced convection. When the rotation rate of the upper part of the solution is different from that of the lower part in the crucible, the centrifu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fccec8840e04c4e0f191d4f3583c82d5
https://doi.org/10.4028/www.scientific.net/msf.821-823.22
https://doi.org/10.4028/www.scientific.net/msf.821-823.22
Autor:
Naoyoshi Komatsu, Toru Ujihara, Fujii Kuniharu, Tetsuo Takahashi, Yuji Matsumoto, Tomohisa Kato, Kazuhisa Kurashige, Takeshi Mitani, Hajime Okumura
Publikováno v:
Journal of Crystal Growth. 401:681-685
The growth rate and surface morphology of 4H–SiC crystals prepared by solution growth with Si 1− x Cr x and Si 1− x − y Cr x Al y ( x =0.4, 0.5 and 0.6; y =0.04) solvents were investigated under various temperature conditions. The growth rate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27317d6cab0b685b5d6ded7ec2f77ca1
https://doi.org/10.1016/j.jcrysgro.2013.11.031
https://doi.org/10.1016/j.jcrysgro.2013.11.031
Autor:
Shusuke Nishiyama, Youichi Tsubota, Junichi Kaneko, S. Kawamura, Morinosato Wakamiya, Shunsuke Ueda, Fumiyuki Fujita, Kazuhisa Kurashige, A. Homma, Mikio Higuchi, Michihiro Furusaka, Hiroyuki Ishibashi
Publikováno v:
Progress in Nuclear Science and Technology. 1:288-291
Crystal structures and scintillation properties of praseodymium-doped gadolinium pyrosilicate (Gd2Si2O7:Pr, GPS:Pr) were investigated as a part of systematic studies of a Gd2Si2O7 system as scintillation materials. Transparent yellowish-green polycry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91d631d6b5c2a7b59d14c38eb59b5f31
https://doi.org/10.15669/pnst.1.288
https://doi.org/10.15669/pnst.1.288
Autor:
Junichi Kaneko, Shusuke Nishiyama, Mikio Higuchi, Hiroyuki Ishibashi, Kazuhisa Kurashige, Michihiro Furusaka, S. Kawamura, J. Haruna, Shunsuke Ueda, Shohei Saeki
Publikováno v:
Crystal Growth & Design. 9:1470-1473
The melting and solidification behavior of the (Gd0.9Ce0.1)2Si2O7 (Ce:GPS) which shows attractive scintillation performance was investigated by means of the slow cooling floating zone (SCFZ) method. Although Ce:GPS melts incongruently, the peritectic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::469bc88017bb3d625e18b7dc59de0b36
https://doi.org/10.1021/cg800932b
https://doi.org/10.1021/cg800932b
Autor:
Hideo Hosono, Kazuhisa Kurashige, Shunsuke Ueda, Satoru Matsuishi, Sung Wng Kim, Yoshitake Toda, Masahiro Hirano, Masashi Miyakawa
Publikováno v:
Thin Solid Films. 516:5772-5776
Single crystals of 12CaO·7Al2O3 (C12A7) have been grown by the Czochralski method with three different growth directions of , , and . Employment of a 2.0% oxygen-containing nitrogen atmosphere and use of an iridium crucible were the critical factors
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b91441e7824b05faddb08ae7a29568ab
https://doi.org/10.1016/j.tsf.2007.10.027
https://doi.org/10.1016/j.tsf.2007.10.027
Autor:
Kazuhisa Kurashige, S. Kawamura, Hiroyuki Ishibashi, Junichi Kaneko, Fumiyuki Fujita, Michihiro Furusaka, A. Homma, Mikio Higuchi, Shohei Saeki, J. Haruna
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 583:356-359
As a novel scintillation material, the use of Ce-doped Gd_{2}Si_{2}O_{7} was investigated. In fact, (Gd_{0.9}Ce_{0.1})_{2}Si_{2}O_{7} powder showed about five-times greater light output than Gd_{2}SiO_{5} (GSO) powder samples for alpha-particles from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47dbd4026d36a12d2ed5b4b946cecc8a
https://doi.org/10.1016/j.nima.2007.09.021
https://doi.org/10.1016/j.nima.2007.09.021