-
Chihiro Urata, Yusuke Yamauchi, Yuko Aoyama, Kazuyuki Kuroda
Session ID: 1H21
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Hierarchically porous materials are fabricated by assembling mesostructured nanoparticles via spray drying. Well-dispersed mesostructured silica nanoparticles (MSN), whose particle size was ca 30 nm, were prepared by a thermal deposition method. By spray drying a MSN colloid solution, MSN were assembled into spherical secondary particles. After calcination, the spherical particles have two types of mesopores, mesopores of 3 nm in size inside of calcined MSN and larger inter-nanoparticle mesopores of about 15 ∼ 20 nm.
View full abstract
-
Masaki Narisawa, Ryuichi Sumimoto, Ken-Ichirou Kita, Hiroyuki Kado, Hi ...
Session ID: 1H22
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Masanao Yoshida
Session ID: 1H23
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takashi Suzuki, Hirokatsu Miyata, Kazuyuki Kuroda
Session ID: 1H24
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Alignment control of pores in phenylene-bridged mesoporous organosilica thin films was achieved using a substrate coated with a rubbing-treated polyimide film.
The films are prepared by two different methods; hydrothermal deposition and so-called evaporation-induced self-assembly (EISA). The narrow alignment distribution of mesochannels
is achieved by the interfacial hydrophobic interactions between alkyl chains of surfactant and the elongated polymer chains of rubbing-treated polyimide. The molecular-scale ordering of
the framework in the films is low, unlike those in mesoporous organosilica powders prepared under basic conditions.
View full abstract
-
Hiromitsu Kozuka, Tetsuo Iwase
Session ID: 1H26
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yoshinori Akamatsu
Session ID: 1H27F
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
We have developed new functional coatings on glass and two examples are shown in this report. One is a water-repellent coating, which is prepared from mixtures of polymerized tetraethoxysilane, trialkoxysilyl-terminated polydimethylsiloxane and fluoroalkylsilane. The resultant coating shows good practical durability for practical use of water-repellent windshields for automobiles. Another is an infrared-cut coating, which is prepared by using silica thick film and ITO fine particles as an infrared-absorbing material.
This coating shows excellent mechanical strength and infrared-absorbing ability and has been used for automotive sidelites.
View full abstract
-
Hiromitsu Kozuka, Takatoshi Akase
Session ID: 1H29
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Tsuyoshi Ishihara, Toshikazu Nishide
Session ID: 1H30
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yoshiyuki Iida, Toshikazu Nishide
Session ID: 1H31
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
TAKEHIRO Yonezawa, YAMATO Hayashi, HIROTSUGU Takizawa
Session ID: 1H32
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Naonori Sakamoto, Takerou Nukina, Naoki Wakiya, Hidetoshi Miyazaki, Hi ...
Session ID: 1H33
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Perovskite-type LaNiO3 (LNO) thin films can be used as a electrode and a seeding layer for ferroelectric thin films because of its relatively high electrical conductivity and low cost. In this work, LNO thin films were deposited on a Si substrate by chemical solution deposition. The resultant LNO thin films were characterized by X-ray diffraction, AFM and conductivity measurement. As a result, very fast rapid thermal annealing resulted in the (100)-oriented LNO thin film with a smooth surface and a reasonable conductivity. In addition, we successfully obtained (100)&(001)-oriented PZT thin film on the LNO seeding layer.
View full abstract
-
Takahiro Kozawa, Ayumu Onda, Koji Kajiyoshi, Kazumichi Yanagisawa
Session ID: 1I17
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Barium titanate (BaTiO
3) powders were prepared by solid-state reaction of BaCO
3 and TiO
2 in air or water vapor atmosphere. The formation rate of BaTiO
3 was accelerated by water vapor. BaTiO
3 was obtained in single phase at 800ºC for 2 h in water vapor atmosphere, while calcination time was required for 5 h to get BaTiO
3 single phase in air. BaTiO
3 powders with high tetragonality were obtained at low temperatures in water vapor atmosphere in comparison with in air.
View full abstract
-
ATSUSHI NAKAMURA, NOBUYOSHI NAMBU, SHIGEO OHSHIO, HIDETOSHI SAITOH
Session ID: 1I18
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yu Hasegawa, Kazuyoshi Uematsu, Kenji Toda, Mineo Sato
Session ID: 1I19
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hiroyuki Muto, Akihiro Mitani, Yusuke Daiko, Kiyofumi Katagiri, Atsuno ...
Session ID: 1I20
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Ichiro Matsubara, Noriya Izu, Toshio Itoh, Maiko Nishibori, Woosuck Sh ...
Session ID: 1I21
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Noriya Izu, Ichiro Matsubara, Toshio Itoh, Maiko Nishibori, Woosuck Sh ...
Session ID: 1I22
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
TAKASHI SHIRAI, YUJI HOTTA, MASAKI YASUOKA, KOJI WATARI
Session ID: 1I23
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yuji Hotta, Huseyin Yilmaz, Takashi Shirai, Katsuya Sato, Kimiyasu Sat ...
Session ID: 1I24
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Katsuya Satou, Yuji Hotta, Koji Watari
Session ID: 1I25
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
hiroki kawade, hideo watanabe, masayoshi huji, minoru takahashi
Session ID: 1I26
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Tomoaki Kato, Masayoshi Fuji, Minoru Takahashi, Yusuke Yamada, Syuichi ...
Session ID: 1I27
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Uniformity is important in ceramics. In gelcasting method, the ununiformitys of additives such as initiator and catalysts causes ununiformity of the green body. In this study, effect of the mixing condition on the gelation process was invetigated. The gel state was changed by stirring speed. At 150rpm, the gel was ununiformed. The other hand, at 300rpm, uniform gel was observed. These results show the mixing process is very effective for uniformity of green body in gelcasting method
View full abstract
-
Yoshihiro Hirata, Yosuke Tanaka
Session ID: 1I28
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
The consolidation behavior of aqueous suspensions of 20-800 nm particles was examined using a pressure filtration apparatus. The relation of applied pressure (ΔP
t)-volume of dehydrated filtrate (V
f) was compared with the established filtration theory for a well dispersed suspension. The theory was effective in the early stage of the filtration but deviation between the experiment and the theory started when ΔP
t exceeded a critical pressure (ΔP
tc). Based on the colloidal phase transition from dispersed to flocculated state, a new filtration theory was developed to explain the ΔP
t-h
t (height of piston) relation for a flocculated suspension. A good agreement was shown between the developed theory and experimental results.
View full abstract
-
Akira NAKIRI, Osamu SAKURADA, Minoru HASHIBA, Yasutaka TAKAHASHI
Session ID: 1I29
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Porous ceramics are of interest to their applications. We have already reported that harogen-free aqueous titanate solution acted as a dispersant for preparing aluminum oxide slurry. In this study, the fluidity of aqueous TiO
2 slurry with titanate solution was investigated. The TiO
2 slurries were impregnated to melamine sponge to prepare the porous TiO
2 ceramics. Sponge-like porous TiO
2 ceramics were able to fabricate by the sintering of sponge impregnated with aqueous TiO
2 slurry.
View full abstract
-
TAKASHI SHIRAI, MASAKI YASUOKA, YOSHIAKI KINEMUCHI, YUJI HOTTA, SHOICH ...
Session ID: 1I30
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Mohd Imran Bin Zainuddin, Satoshi Tanaka, Keizo Uematsu
Session ID: 1I31
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
The effect of binder segregation on the green strength of dry-pressed alumina ceramics was studied. The granules were produced by spray-drying alumina slurries containing ammonium polyacrylic acid (NH
4PAA) acting as both disperser and binder. Green strength of alumina compact was measured using diametral compression test. Green strength increases with increasing binder content with three stages of increasing pattern. Green strength increases significantly after binder segregation occurs. Granules without binder segregation show total transgranular fracture. Whereas, granules with binder segregation show transition from intermediate fracture to total transgranular fracture with increasing forming pressure.
View full abstract
-
satoshi tanaka, noriyasu sano, zenji kato, keizo uematsu
Session ID: 1I32
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
ATSUSHI IWATA, JUN AKEDO
Session ID: 1I33
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
To fabricate light circuit in LSIs, aerosol deposition was used to make lead zirconate titanate (PZT) films on silicon wafers. XY scanning of nozzles was used to cover the whole wafer surfaces. Broadening beams and straight beams were compared. The cross section of broadening beams had one peak shape, while that of straight beams had shape of a plateau. The microscopic surface shape to the shift direction of the nozzles clearly showed the effect of nozzle shift in surfaces made by broadening beams. The broadening beams made films with smaller surface roughness and with better macroscopic evenness.
View full abstract
-
Yong-Jun Liu, Mami Aizawa, Zheng-Ming Wang, Hiroaki Hatori, Naofumi Ue ...
Session ID: 1J17
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Satoshi Okano, Toshiro Tanaka
Session ID: 1J18
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Motohiro Yamada, Kazunori Satou, Hirotaka Wada, Masahiro Fukumoto
Session ID: 1J19
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Titanium dioxide (TiO
2) is a promising material for photocatalyst coating. However, it is difficult to fabricate TiO
2 coatings which have excellent photocatalyst property by thermal spray processes. Because anatase phase of TiO
2 transforms into rutile phase under high temperature. In this study, TiO
2 coatings were fabricated by cold spraying. TiO
2 powder was injected into a supersonic gas stream and deposit onto steel substrate. It was possible to fabricate TiO
2 coatings with dense microstructure. The photocatalytic property of the coatings was evaluated by NOx elimination test. From the results, it became clear that cold sprayed TiO
2 coatings had excellent photocatalyst property.
View full abstract
-
Mizuki KOMABA, Osamu SAKURADA, Minoru HASHIBA, Yasutaka TAKAHASHI
Session ID: 1J20
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Aqueous titanate solution (TNB-Lac) was prepared by reaction of titanium alkoxide (titanium tetra-
n-butoxide) with lactic acid (Lac) in water. TNB-Lac shows polyanion-like behavior and is free from hazardous halogen, nitrogen, sulfur, and metal ions other than titanium. The thin TiO
2 films were formed by adsorption of negatively-charged titanate colloidal nanoparticles on the surface of the glass substrate charged positively by polyethylenimine (PEI). The thin TiO
2 films were characterized by SEM, EDX and XRD.
View full abstract
-
Teiichi Kimura, Naohiro Hayashi, Takashi Goto
Session ID: 1J21
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
TiO2 films were prepared by ECR plasma CVD. The effects of plasma on deposition rates, microstructures, crystalline phases and crystal orientations were investigated. TiO2 film prepared at PM=0 kW, Tpre=973 K had a dense isotropic structure with smooth surface, and those prepared at PM=3.0 kW, Tpre=973 K had a columnar cross-sectional structure with complicated faceted surface. The deposition rate increased with increasing PM, and was 60 mm/h at PM=0 kW and 100 mm/h at PM=3.0 kW. ECR plasma accelerated deposition reactions of precursor, resulting in high deposition rate particularly at high precursor rate.
View full abstract
-
Yue Li, Takeshi Sasaki, Yoshiki Shimizu, Naoto Koshizaki
Session ID: 1J22
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Here we present a new route to fabricate hexagonal-non-close-packed (hncp), hierarchical TiO2 ordered nanoparticle array film by pulsed laser deposition (PLD) using polystyrene (PS) colloidal monolayer as a template. TiO2 was deposited onto the monolayer PS colloidal crystal template by PLD using rutile TiO2 pellet as a target and oxygen as the background gas. After annealing at 650 C for 2 h in air, the hncp, anatase typed hierarchical TiO2 nanoparticle array was obtained. Each large nanoparticle in the ordered array was composed of smaller nanoparticles (30 nm). This hierarchical nanoparticle array exhibits strong superhydrophilicity with water contact angle of 0 degree without further UV irradiation.
View full abstract
-
Shu YIN, Bin LIU, Tsugio SATO
Session ID: 1J23
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Nitrogen-doped titania (TiO2-xNy) nanoparticles with excellent visible-light-reactive photocatalytic activity were successfully prepared by the microwave-hydrothermal process. The effects of different parameters such as reaction time, temperature, and pH value of solvents on the formation of TiO2-xNy nanoparticles under microwave–hydrothermal conditions were investigated in details. The obtained TiO2-xNy powders showed higher specific surface area, finer particle size, and excellent photocatalytic ability for the oxidative destruction of nitrogen monoxide under irradiation of both visible-light (wavelength>510nm) and UV light (wavelength>290nm).
View full abstract
-
KOJI IOKU, SETSUAKI MURAKAMI, MASANOBU KAMITAKAHARA, NORIAKI WATANABE, ...
Session ID: 1J24
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
A hydrothermal method can provide the rod-shaped hydroxyapatite under the mild conditions where anatase phase is stable. Granules of rod-shaped hydroxyapatite particles and anatase composite were prepared by a hydrothermal treatment of the granules consisting of the mixture of tricalcium phosphate (TCP) and anatase. The resultant composite granules showed higher decomposition activity against acetaldehyde under UV irradiation than the anatase alone.
View full abstract
-
Masanobu Kamitakahara, Mineo Hashizume, Ken Tsutsumi, Masao Tanihara, ...
Session ID: 1J25
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Shunsuke Matsui, Akira Nakajima, Kiyoshi Okada, Yoshikazu Kameshima
Session ID: 1J26
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Sayaka Yanagida, Akira Nakajima, Yoshikazu kameshima, Kiyoshi Okada, T ...
Session ID: 1J27
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
H
3PW
12O
40(PW12) is a well-known acid catalyst and photocatalyst. In PW
12-TiO
2 system, PW
12 acts as scavenger and then reduced PW
12 is excited by visible light. In this work, PW
12/TiO
2 hybrid thin films and TiO
2 control films were prepared by layer-by-layer (LBL) method. Their photocatalytic activities were estimated by 2-propanol decomposition under UV-visible light. Visible light illumination was required for continuous 2-propanol decomposition. Excitation of reduced PW
12 by visible light is necessary for the photocatalytic decomposition process.
View full abstract
-
Tadachika Nakayama, Hong-Dae Kim, Shuntaro Suzuki, Masahiro Terauchi, ...
Session ID: 1J28
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Akira Nakajima, Aya Nakada, Naoki Arimitsu, Yoshikazu Kameshima, Kiyos ...
Session ID: 1J29
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Kenichi Ito, hiroki okudera
Session ID: 1J30
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Naoki Arimitsu, Akira Nakajima, Yoshikazu Kameshima, Kiyoshi Okada
Session ID: 1J31
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Tomoki Yanagisawa, Akira Nakajima, Kiyoshi Okada, Yoshikazu Kameshima
Session ID: 1J32
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
MUNETOSHI SAKAI, Ayako Hashimoto, Shunsuke Suzuki, Naoya Yoshida, Yosh ...
Session ID: 1J33L
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Atsuo Ito, Yu Sogo, Atsushi Yamazaki, Mamoru Aizawa, Akiyoshi Osaka, S ...
Session ID: 1K21
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
An in vitro method for evaluating material resorbability is proposed. The method consists of dissolution rate measurement in a sodium acetate-acetic acid buffer solution at pH 5.5. Efficacy of the method was evaluated by round-robin tests and the comparison with in vivo resorption. Relative values of dissolution rate in the period from 0 to 30 min best coincided among the participating institutes falling within an acceptable range of variation. The relative values also well coincided with the relative amount of in vivo resorption in the case of pure tricalcium phosphate ceramic.
View full abstract
-
Jun Fukasawa, Mamoru Aizawa
Session ID: 1K22
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
We have developed porous apatite-fiber scaffolds (AFSs) for tissue engineering of bone using single-crystal apatite fibers. In order to evaluate a bioresorbability of AFSs under an environment of an osteoclastic resorption, the AFSs were immersed into the buffer solution consisting of acetic acid and sodium acetate at pH 5.5 as a model of quasi-osteoclastic producting solution. The concentration of calcium ions released from the AFSs in the acetic acid buffer was continuously measured using a calcium ion meter. The profiles of released Ca
2+ ions indicated that the amounts of Ca
2+ ions from AFS were more than those of commercially-available HAp powder as a control.
View full abstract
-
Naoyuki Matsumoto, Yuri Fujisaki, Katsumi Yoshida, Kazuaki Hashimoto, ...
Session ID: 1K23
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
The effects of doping the monovalent ion (Li
+, Na
+, K
+ions) in β -tricalcium phosphate ( β -TCP) on these solubility were investigated by dissolved test in distilled water and saline solution. The order of the leaching rate of Ca
2+ ion was Li
+ ion doped β -TCP< Na
+ ion doped β -TCP< K
+ ion doped β -TCP< β -TCP. From these results, the leaching rate of Ca2+ ion of the monovalent ion doped β -TCP would be related to these lattice constants. In addition, the crystal phase and lattice constant of all the filtered precipitates after dissolved test unchanged regardless of the immersing day.
View full abstract
-
Toshiki Miyazaki
Session ID: 1K25A
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takashi Kizuki
Session ID: 1K27
Published: 2008
Released on J-STAGE: February 07, 2009
CONFERENCE PROCEEDINGS
FREE ACCESS
Titanium metal was soaked in 5M NaOH solution and then 100mM MgCl
2 solution. About 5 atom% Na
+ ions were incorporated into the surface of the titanium metal by the former NaOH treatment. The Na
+ ions were replaced with about 3 atom % of Mg
2+ ions by the latter MgCl
2 treatment. The MgCl
2-treated titanium metal formed an anatase by the subsequent heat treatment at 600°C. Thus treated titainum metal formed an apatite on its surface in a simulated body fluid.
View full abstract