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Hiroki Morooka, Kazumasa Nakamura, Hitoshi Shindo, Yasuhiro Tanabe, Ei ...
Session ID: 2G25
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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Oxidation behaviors of GLC in H
2SO
4 , HNO
3 and H
2O
2 aq. at 70 degrees C were studied with SEM , optical microscope and by weight measurement. Sulfur was detected with GLC soaked in conc.H
2SO
4 , although no change was detected in surface morphology. Lots of cracks were formed at to the depth of 18 um the surface of GLC soaked in conc.HNO
3 , although N-containing species was not detected with XPS. Voids were formed at the GLC surface treated in H
2O
2 aq.(30%)
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Atsushi Saiki, Takashi Hashizume, Kiyoshi Terayama
Session ID: 2H01
Published: 2008
Released on J-STAGE: February 07, 2009
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M.N. Naim, Wulet Lenggoro, Masahiko Kuwata, Hidehiro Kamiya, Masutake ...
Session ID: 2H02
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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Xiulan Hu, Yoshitake Masuda, Tatsuki Ohji, Kazumi Kato
Session ID: 2H03
Published: 2008
Released on J-STAGE: February 07, 2009
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Semi-circular shaped ZnO nanowhiskers were self assembled on a pretreated F-doped SnO2 coated glass (FTO) substrate using an aqueous solution at 88 C. The pretreated substrates were prepared from the spin coating and subsequently dehydration and/or thermal decomposition of zinc nitrate hexahydrate. A 200-ml aqueous solution of zinc nitrate hexahydrate, hexamethylenetetramine (HMT) and polyethylenimine (PEI) was used for fabricating ZnO nanowhiskers. The pre-existing zinc nitrate hexahydrate-derived seeds layer promoted heterogeneous nucleation and growth of ZnO preferentially orientated along the c-axis direction, resulting in the formation of the unique semi-circular shaped ZnO nanowhiskers assembles.
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hajime wagata, Gallage Ruwan, Nobuhiro Matsushita, Masahiro Yoshimura
Session ID: 2H04
Published: 2008
Released on J-STAGE: February 07, 2009
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Ink-Jet deposition technique could be used to prepare BaTiO3 thin film dot arrays. In the present study, aqueous precursor solution for BaTiO3 was prepared from the barium nitrate and ammonium citratoperoxotitanate (NH4)8[Ti(C6H4O7)O2]2H2O. Dot arrays were fabricated by jetting the solution to heated substrate at 350-400
oC and heat-treated at 650
oC for crystallization. Raman spectroscopy revealed that the dots consist of tetragonal and hexagonal BaTiO3.
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Jun Akedo, Akito Endo
Session ID: 2H05
Published: 2008
Released on J-STAGE: February 07, 2009
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Yosuke Sonohara, Yoshihiro Shibayama, Masahiro Shikatani, Kazuya Kusam ...
Session ID: 2H06
Published: 2008
Released on J-STAGE: February 07, 2009
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Hitoshi INAMI, Tomohide ISHIKAWA, Kiyofumi KATAGIRI, Kunihito KOUMOTO
Session ID: 2H07
Published: 2008
Released on J-STAGE: February 07, 2009
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Yuka AIZAWA, Yuuki YAZAWA, Kazuaki HASHIMOTO, Yoshitomo TODA, Toshihik ...
Session ID: 2H08
Published: 2008
Released on J-STAGE: February 07, 2009
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Hiroaki Uchiyama, Hiroaki Imai, Eiji Hosono, Haoshen Zhou, Itaru Honma
Session ID: 2H09
Published: 2008
Released on J-STAGE: February 07, 2009
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Takashi Minagawa, Tadachika Nakayama, Tsuneo Suzuki, Hisayuki Suematsu ...
Session ID: 2H10
Published: 2008
Released on J-STAGE: February 07, 2009
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Until now, the high energy density field has been formed in the vacuum. On the other hand, the technology which forms the extreme energy density field in the solution recently develops. Though the synthesis of the anisotropic nanomaterial becomes possible using this method, the mechanism does not become clear. In this paper, the effect of the photoirradiation condition on the nanostructure is examined. It succeeded in controlling synthesis speed of the particulate quality by the optimization of the photoirradiation condition. With this method, the anisotropicsheet / particulate structured silver nanocomposites were successfully obtained.
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Kiyoshi Ozawa, Reika Okada, Hiroyasu Itoh, Fumio Iso
Session ID: 2H22
Published: 2008
Released on J-STAGE: February 07, 2009
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The ZnO-magadiite nanocomposites were prepared by an ion-exchange technique. TEM measurements show that the ZnO nanoparticles with a relatively uniform particle size of 2.5 – 5 nm are well dispersed in the interlaminar spaces of the magadiite compound: Na2Si14O29nH2O, and the crystallinity of the ZnO nanoparticles seems to increase with the increasing heat-treatment temperature in air.
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NAOFUMI UEKAWA, TAKASHI KOJIMA, KAZUYUKI KAKEGAWA
Session ID: 2H23
Published: 2008
Released on J-STAGE: February 07, 2009
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Naonori Sakamoto, Masahito Hori, Yuki Matsuyama, Naoki Wakiya, Hisao S ...
Session ID: 2H24
Published: 2008
Released on J-STAGE: February 07, 2009
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12CaO•7Al
2O
3(C12A7) is known as a constituent of alumina cement. Recent studies reveal C12A7 has nano size cages and various anion accommodates in the cages. We prepared C12A7 powders by chemical solution deposition. Aluminum sec-butoxide, calcium nitrate tetrahydrate were used as raw materials. Structure, crystallization temperature, and surface morphology were investigated by XRD, TG-DTA and SEM. Single phase C12A7 powders were obtained at 900 ºC. Therefore, we concluded O
2 atmosphere was essential for the crystallization of C12A7. Crystallization temperature was determined at 900 ºC in O
2 atmosphere. SEM image of obtained powders revealed C12A7 particles were sintered and formed porous bulk.
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Teruaki Danno, Hiroshi Asaoka, Makoto Nakanishi, Tatuo Fujii, Jun Taka ...
Session ID: 2H25
Published: 2008
Released on J-STAGE: February 07, 2009
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Shoichi Kume, Masaki Yasuoka, Ikuko Yamada, Akinori Kan, Hirotaka Ogaw ...
Session ID: 2I01
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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Daisuke HIRATSUKA, Junichi TATAMI, Toru WAKIHARA, Katsutoshi KOMEYA, T ...
Session ID: 2I02
Published: 2008
Released on J-STAGE: February 07, 2009
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Tohru Suzuki, Tetsuo Uchikoshi, Yoshio Sakka
Session ID: 2I03
Published: 2008
Released on J-STAGE: February 07, 2009
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AlN has attracted considerable attention as a substrate material and other applications because of its excellent properties, such as its high thermal conductivity. Controlling its crystallographic orientation is expected to be an effective way of improving these properties. A strong rotational magnetic field is necessary to control the development of the c-axis alignment in AlN polycrystal using slip casting, because the a, b-axes of AlN are the easy axes of magnetization. In this presentation, we attempt to control the direction of the c-axis using the electrophoretic deposition (EPD) in the rotational magnetic field.
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satoshi tanaka, kazunori mishina, keizo uematsu
Session ID: 2I04
Published: 2008
Released on J-STAGE: February 07, 2009
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Toshio Kimura, Kengo Tsuzuki, Ken Tamura
Session ID: 2I05
Published: 2008
Released on J-STAGE: February 07, 2009
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Tatsuhiro Shigyo, Junichi Takahashi, Hidenobu Itoh
Session ID: 2I06
Published: 2008
Released on J-STAGE: February 07, 2009
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katsuyoshi yamasaki, satoshi tanaka, keizou uematsu
Session ID: 2I07
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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Atsushi ODAKA, Tomohiro YAMAGUCHI, Takayuki FUJITA, Seiichi TARUTA, Ku ...
Session ID: 2I08
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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Ca-doped alumina nano-powders were prepared by a new sol-gel route using Ca-doped polyhydroxoaluminum (PHA) solution under seeding. The nano-powder calcined at 1173K consisted of about 80 nm α-alumina particles and γ-alumina nano-particles. The sintered samples from the nano-powder attained the relative density of >99% with the average grain size of 0.66 μm at 1648K by pressureless sintering. This result implies that the new sol-gel method using Ca-doped PHA solution combined with seeding would be an effective route for producing nano-sized alumina powders, hence leading to the fabrication of fine-grained alumina ceramics at lower sintering temperatures.
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Chia-Hung Kuo, Deng-an Tsai, Chii-Shyang Hwang
Session ID: 2I09
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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For the purpose of fabricating transparent submicrometer alpha-Al2O3 via pressureless sintering, uniform green compacts were prepared by controlling the particle size distribution of alpha-Al2O3
powders and wet forming of slurries. The microstructure and transparent properties of sintered alpha-Al2O3 ceramics were investigated. The transparent submicrometer alpha-Al2O3 ceramics were
obtained by pressureless sintering in air at 1400 degree C for 2 h.
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Masayasu Kodo, Kohei Soga, Hidehiro Yoshida, Takahisa Yamamoto
Session ID: 2I10
Published: 2008
Released on J-STAGE: February 07, 2009
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Tomoaki Satoh, Koichi Haga, Masaaki Sasaki, Kunio Yubuta, Toetsu Shish ...
Session ID: 2J02
Published: 2008
Released on J-STAGE: February 07, 2009
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Photocatalytic properties of micro-sized zinc oxide (ZnO) fibers derived from bis(acetylacetonato)zinc under visible-light irradiation have been examined. The ZnO fibers show decomposition behavior of a volatile organic compound (VOC), xylene, under the irradiation of white fluorescent light, which had a color temperature of 3500 K where visible-light is dominant. The behavior is also shown under the irradiation of 400 nm and 405 nm LED, while is not under 460 nm and 475 nm LED.
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Peilin Zhang, Shu Yin, Tsugio Sato
Session ID: 2J03
Published: 2008
Released on J-STAGE: February 07, 2009
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The interlayer distances of layered semiconductors such as K
4Nb
6O
17, K
2Ti
4O
9 and KTiNbO
5 were enlarged by the ion exchange with H
+ followed by the intercalation of alkylamine. EDX, CN analysis, XRD, TG-DTA, together with UV-vis measurement were carried out to characterize the prepared samples. The photocatalytic activities were evaluated by the photo-decomposition of NO. The results suggested that the enlargement of the interlayer distance was useful to promote the photocatalytic activities for the dustruction of NO.
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Masato Yamamori, Yoshiya Kimura, Susumu Hiyama, Fumio Munakata
Session ID: 2J04
Published: 2008
Released on J-STAGE: February 07, 2009
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Yusuke Mizuno, Katsuya Teshima, Kunio Yubuta, Takaomi Suzuki, Toetsu S ...
Session ID: 2J05
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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H. Horigome, N. Abe, H. Yamazaki, S. Sano, H. Ozu, Masahiko Moriya
Session ID: 2J06F
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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Manufacturing the artificial aggregate that used the technology that recycled various industrial wastes as a cement raw material, and made the contaminated soil a raw material and the usage were examined. It turned out to be able to manufacture a high-quality aggregate equal with natural production and the aggregate of high performance that gave lightweight properties from the result of the examination, and to apply to a wide usage to not only the civil engineering material but also environmental materials. It has been understood that the cement industry can contribute to the recycling society further.
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Ryo SASAI, Takayuki MORISHITA, Michiko KUSUNOKI, Motohiro YAMAMOTO, Ak ...
Session ID: 2J08
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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To develop the novel recycling method of the used SiC abrasive powder, we investigated on the conversion of the used SiC abrasive powder to the high density CNT particles by SiC surface decomposition technique. From TEM observation of the treated SiC particles after the optimal pre-heating treatment, it was revealed that high dense and orientated CNTs layer could be observed on the surface of the used SiC particle, like the case of pure SiC particles. Thus, this indicates that not only the cost for synthesizing CNT particles but also the disposal amount of the used SiC powder can be reduced.
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Risa Hayashi, Motohide Matsuda, Michihiro Miyake
Session ID: 2J09
Published: 2008
Released on J-STAGE: February 07, 2009
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We have studied resource recovery of anode materials of spent Ni-MH batteries. In this work, CH4 dry reforming catalytic properties of Ce-based oxide recovered from the anode materials were investigated. It was observed that the Ce-based oxide exhibited high CH4 conversion in CH4 dry reforming. This was attributable to metallic Ni formed by reduction of NiAl2O4 which co-existed with the Ce-based oxide samples.
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Hirokazu Naganuma, Takashi Kubo, Yuki Yamasaki, Atsushi Nakahira
Session ID: 2J10
Published: 2008
Released on J-STAGE: February 07, 2009
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Changing blast furnace slag to tobermorite by improved hydrothermal process was attempted for changing blast furnace slag to useful material. Monolithic phase of tobermorite with fine lead removal ability was successfully synthesized by rotary hydrothermal treatment with controlled Ca/(Al+Si) molar ratio for 0.8 ~ 1.0. It revealed that the presence of aluminum component and the value of Al/(Al+Si) molar ratio was affected greatly in synthesis pure phase of tobermorite. And solidification of synthesized tobermorite was successed.
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Hirokazu Sasaki, Yoshikazu Kameshima, Akira Nakajima, Kiyoshi Okada
Session ID: 2J22
Published: 2008
Released on J-STAGE: February 07, 2009
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Oleic acid / ascorbic acid (ASA) / layered double hydroxide (LDH) composites were prepared and their releasing behaviors of contained ASA were investigated. Firstly, the ASA / LDH composites were prepared by reconstruction method of heated LDH in ASA solution. The contents of ASA in the composite was 30 mass%. Secondly, obtained ASA / LDH composites were treated in sodium oleate solution. And finally, the oleic acid /ASA / LDH composites were obtained. The releasing behaviors of ASA from these composites were investigated in acid solution. Releasing rate of ASA decreased with increasing of oleic acid amount in the composite.
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Daisuke Kato, Toshiyuki Masui, Nobuhito Imanaka
Session ID: 2J23
Published: 2008
Released on J-STAGE: February 07, 2009
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Fumihiko Ikawa, Yoshikazu Kameshima, Akira Nakajima, Kiyoshi Okada
Session ID: 2J24
Published: 2008
Released on J-STAGE: February 07, 2009
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Porous machinable ceramics was prepared by firing of talc and ceramic balloon with adding LiCl. SEM observation indicated that the resulting composites have pores and plate particle. The pores were formed by melting of ceramic balloon by the reaction with LiCl. Composite with high machinability was high and bending strength 10 MPa were obtained.
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Iwao Noda
Session ID: 2K05F
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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Artificial joints are widely used in the orthopedic field. In
order to improve the intraosseous fixation of cement-less implant, we have developed titanium rough-surface coating method by the inert gas shielded arc spray and hydroxyapatite coating method by the flame spray (PROARC HA). It has been reported that the artificial hip joints utilizing PROARC HA technology showed long-term clinical results.
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Hiroshi Masumoto, Takashi Goto, Yusuke Orii, Yoshitomo Honda, Osamu Su ...
Session ID: 2K07
Published: 2008
Released on J-STAGE: February 07, 2009
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Masakazu Kawashita, Tomoyasu Hayakawa, Gikan Takaoka
Session ID: 2K08
Published: 2008
Released on J-STAGE: February 07, 2009
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Atsumasa Shishido, Atsutomo Nakamura, Ippei Kishida, Masahiro Okada, T ...
Session ID: 2K22
Published: 2008
Released on J-STAGE: February 07, 2009
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The crystallographic orientation relationship between hydroxyapatite (HAp) nanocrystals and poly(acrylic acid) (PAA) graftpolymer-modified poly(ethylene terephthalate) (PET) substrate was studied using transmission electron microscopy (TEM). We investigated the microstructure of fabricated rod-like HAp nanocrystals and the interface of HAp/PET composite, where the HAp nanocrystals are bonded onto PAA graftpolymer-modified PET substrate. The selected-area electron diffraction (SAED) pattern of interface of the HAp/PET composite indicated that some low index planes in HAp prism plane tended to be contact plane with the PET substrate surface.
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Hironobu Sekikawa, Takahiro Kawai, Hidero Unuma
Session ID: 2K23
Published: 2008
Released on J-STAGE: February 07, 2009
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Hollow hydroxyapatite particles a few ten micrometers in diameter were prepared using urease-containing poly(divinyl benzene) microspheres as templates. The templates, synthesized by a radical polymerization, were soaked in a solution containing Ca(NO
3)
2, NH
4H
2PO
4 and urea for 3 to 24 hours, during which the enzymatic reaction product, ammonia, precipitated hydroxyapatite preferentially on the surface of the template. Hollow hydroxyapatite particles were obtained by calcination to remove the templates.
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Yasuto Hoshikawa, Eiichi Yasuda, Takamasa Onoki, Masaru Akao, Yasuhiro ...
Session ID: 2K24
Published: 2008
Released on J-STAGE: February 07, 2009
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A new organic silicate coating on titanium substrate by the sol-gel method from methyltriethoxysilane, niobium-alkoxide, tantalum-alkoxide and calcium nitrate tetrahydrate at 80˚C was investigated. The coating was covered by bone-like apatite deposition after soaking in a simulated body fluid for 3 or 6 days. The adhesive strength of the coating with a 0.05 Ca/Si ratio was 3.5MPa, while the adhesive strength of the coating tended to decrease to 2 MPa with the increasing Ca content. The coatings exhibited apatite-forming ability in a short period and sufficient adhesion of the coating on the titanium surface utilized as bone implants.
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DAIKI YAMASHITA, KIYOSHI ITATANI, TOMOHIRO UMEDA, SEIICHIROU KODA
Session ID: 2K25
Published: 2008
Released on J-STAGE: February 07, 2009
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Flexible and porous forms of hydroxyapatite(Ca10(PO4)6(OH)2 : HAp)composites with various amounts of alginate (AG) were fabricated using HAp and sodium alginate. The de-ionized water was added to the mixture of fibrous HAp and AG in order to form a paste, and then the paste was freeze-dried for 24 h. This freeze-dried material was put into 1 mol dm-3 CaCl2 solution in order to fabricate a porous body. The compressive strength of porous composite increased from 0.47 to 3.2 MPa with increasing HAp/AG ratio from 0.5 to 8.0, reflecting the increased bulk density from 0.17 to 0.67 g cm-3.
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Koichiro Fukuda, Tomoyuki Iwata, Masamichi Ito
Session ID: 2L01
Published: 2008
Released on J-STAGE: February 07, 2009
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Crystal structures of (BaxCa1-x)2SiO4 were investigated by laboratory X-ray powder diffraction. With x = 0.65, the initial structural model with eleven independent atoms in the unit cell was determined using direct methods, and it was further modified to a split-atom model, in which the two types of Ba/Ca atoms and two types of SiO4 tetrahedra were, respectively, positionally and orientationally disordered. The crystal structure is trigonal (space group P-3m1, Z = 4) with lattice dimensions a = 0.57505(1) nm, c = 1.46706(2) nm and V = 0.42014(1) nm3. This compound is most probably homeotypic to glaserite.
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Ryo Koyama, Minoru Morioka, Yoko Ohba, Etsuo Sakai, Masaki Daimon
Session ID: 2L02
Published: 2008
Released on J-STAGE: February 07, 2009
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Ryuta Kikuchi, Yoko Ohba, Etsuo Sakai, Masaki Daimon
Session ID: 2L03
Published: 2008
Released on J-STAGE: February 07, 2009
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Porosity distribution of the autoclaved calcium silicates were changed by mixing the charcoal of bamboo and the activated carbon, in order to apply for the humidity controllable materials. The powders of charcoal of bamboo and the activated carbon were dispersed in the autoclaved samples without reacting with calcium silicate. The optimum size and amount of the macro pore of the reacted samples would be controlled by the water / powder ratio, considering the water adsorption to the charcoal of the carbon.
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Jun Moteki, Toru Aoki, Yoko Ohba, Etsuo Sakai, Masaki Daimon
Session ID: 2L04
Published: 2008
Released on J-STAGE: February 07, 2009
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Shunsuke HANEHARA, Shun-ya FUKUDA
Session ID: 2L05
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
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YASUO KAKINUMA, YUTAKA AIKAWA, MAKIHIKO ICHIKAWA, DAISUKE KUROKAWA, ET ...
Session ID: 2L06
Published: 2008
Released on J-STAGE: February 07, 2009
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Fluidity of powder paste is influenced by powder property. This paper discusses the influence of the particle size distribution of crushed silica powder and fluidity of crushed silica paste. It is found that filling ratio of powder calculated by particle distribution analysis program and the fluidity of crushed silica paste have a correlation . This is caused Particle size distribution plays an important role on fluidity of dense suspension.
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Takayuki Yamada, Etsuo Sakai, Masaki Daimon, Daiki Atarashi
Session ID: 2L07
Published: 2008
Released on J-STAGE: February 07, 2009
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