Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Kunio Kitajima"'
Autor:
Morinobu Endo, Yuki Usui, Kaoru Aoki, Naoki Ueda, Tomohiro Yamaguchi, Tomohiko Yamakami, Kunio Kitajima, Seiichi Taruta, Naoto Saito
Publikováno v:
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN. 120(1408):560-568
In this study, carbon nanofibers (CNFs) having different amounts of defect were prepared by acid-treating for 0.5, 1 and 5 h and were combined with alumina. Then, the influence of the amount of defect on the CNFs on microstructure development of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63f94ea1d9c540098e6949ea6c5ea294
https://soar-ir.repo.nii.ac.jp/records/12364
https://soar-ir.repo.nii.ac.jp/records/12364
Publikováno v:
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS. 177(7):524-527
Na-taeniolite (NaMg2LiSi4O10F2) mica crystals were synthesized from nonstoichiometric raw batches containing NaCl as a flux, in order to control the morphology of mica crystals. Swellable Na-taeniolite was obtainable from both stoichiometric and nons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27781469f334b83bf6eeb3a0554ee51f
https://soar-ir.repo.nii.ac.jp/records/12392
https://soar-ir.repo.nii.ac.jp/records/12392
Autor:
Kunio Kitajima, Yoshitomo Iwasaki, Seiichi Taruta, Hiromasa Nishikiori, Kiyoshi Okada, Tomohiro Yamaguchi, Tomohiko Yamakami
Publikováno v:
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS. 177(7):504-509
Transparent mica glass-ceramics were prepared by heating parent glasses that had been doped with 0.5-15 mol% CeO2. During the melting and heat treatment, Ce4+ ions in the specimens were reduced to Ce3+ ions, and one or both of these ion species were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a125e4aa052e20bdc7e3d16110d90a6
https://soar-ir.repo.nii.ac.jp/records/12391
https://soar-ir.repo.nii.ac.jp/records/12391
Publikováno v:
Ceramics International. 37:201-206
Low-temperature α-alumina formation was attempted using various polyhydroxoaluminum (PHA)–hydroxy acid composite gels, which were prepared from PHA solutions containing different amounts of hydroxy acids, such as lactic acid, glycolic acid, malic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bcd2abefe2f6841fc1d025b63e1a1d75
https://doi.org/10.1016/j.ceramint.2010.08.035
https://doi.org/10.1016/j.ceramint.2010.08.035
Publikováno v:
Materials Science and Engineering: B. 173:271-274
Ammonium ion exchange of Na-4-mica and thermal transformation of the ion-exchanger were investigated and the conductivities of the heated ion-exchangers were estimated. More than 95.4% of Na+ ions in the interlayer of the Na-4-mica could be substitut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a15df241a4271c01feae6b46bb6fe5a
https://doi.org/10.1016/j.mseb.2010.01.005
https://doi.org/10.1016/j.mseb.2010.01.005
Autor:
Hiromasa Nishikiori, Seiichi Taruta, Tomohiro Yamaguchi, Tomohiko Yamakami, Kunio Kitajima, Mutsumi Matsuki
Publikováno v:
Ceramics International. 36:1303-1309
Eu-doped transparent mica glass–ceramics were prepared, the influence of Eu-doping on the crystallization of the parent glasses was investigated and the luminescent properties of the parent glasses and the glass–ceramics were estimated. A small a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9b97bf0b6010425da7b71e56caac1d1
https://doi.org/10.1016/j.ceramint.2009.12.020
https://doi.org/10.1016/j.ceramint.2009.12.020
Fabrication and mechanical properties of high-dispersion-treated carbon nanofiber/alumina composites
Autor:
Tomohiko Yamakami, Seiichi Taruta, Kaoru Aoki, Naoki Ueda, Kunio Kitajima, Takefumi Nakanishi, Fumiaki Miyaji, Morinobu Endo, Naoto Saito, Tomohiro Yamaguchi, Yuki Usui
Publikováno v:
Journal of the Ceramic Society of Japan. 118:847-854
High-dispersion-treated carbon nanofibers (CNFs) were used to fabricate uniformly-dispersed CNFs-alumina composites with enhanced mechanical properties. The treatment was effective in obtaining dense and uniform composites. The composites containing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b6baefc457f12cb30c53b194122714b
https://doi.org/10.2109/jcersj2.118.847
https://doi.org/10.2109/jcersj2.118.847
Publikováno v:
POWDER TECHNOLOGY. 193(1):26-31
Rare-earth (RE: Lu, Gd, Nd, 0.10 mol%)-doped alumina nanopowders were prepared by a new sol-gel route using polyhydroxoaluminum (PHA) and RECl(3) Solutions under alpha-alumina (similar to 75 nm) seeding. Among the rare-earth dopants studied, Lu yield
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d285b35121574df69b038e47f58cf71
https://soar-ir.repo.nii.ac.jp/records/12450
https://soar-ir.repo.nii.ac.jp/records/12450
Publikováno v:
Ceramics International. 35:1845-1850
Dense submicron-grained alumina ceramics were fabricated by pulse electric current sintering (PECS) using M(2+)(M: Mg, Ca, Ni)-doped alumina nanopowders at 1250 degrees C under a uniaxial pressure of 80 MPa. The M(2+)-doped alumina nanopowders (0-0.1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f5d4264ada1e3ed67077edddd1d186b
https://doi.org/10.1016/j.ceramint.2008.10.007
https://doi.org/10.1016/j.ceramint.2008.10.007
Publikováno v:
Journal of the European Ceramic Society. 28:2479-2485
This paper demonstrates that the Ca-doped alumina nanopowders prepared by a new sol–gel route using polyhydoxoaluminum (PHA) and CaCl 2 solutions under α-alumina seeding represent a viable option for producing fine-grained ceramics. Appropriate co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f00aacd5c1ffffa27ccc39d3484da39
https://doi.org/10.1016/j.jeurceramsoc.2008.04.001
https://doi.org/10.1016/j.jeurceramsoc.2008.04.001