巻号一覧
59 巻, 11 号
November
選択された号の論文の7件中1～7を表示しています
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研究論文
研究論文
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Junichi HOJO, Hui TONG, Shunsuke SHINTANI, Miki INADA, Yumi TANAKA, Na ...2012 年 59 巻 11 号 p. 621-625
発行日: 2012/11/15
公開日: 2013/01/11
ジャーナル オープンアクセスPhotovoltaic properties of wet-type dye-sensitized solar cells were investigated with emphasis on the structures of two types of TiO2-ZnO composites as photoelectrodes. One was the mixed electrode of TiO2 and ZnO powders. Another was the TiO2-coated ZnO nanorod array prepared by a sol-gel process. The composite films were loaded on a transparent electrode and clacined at 450-500°C, on which dye molecules were adsorbed. The current-voltage characteristics were measured in iodide electrolyte solution under a simulated solar light. The mixed electrode exhibited a significant decrease in current density and photovoltaic efficiency compared to TiO2 electrode. Although the photovoltaic efficiency of ZnO was lower than that of TiO2, TiO2 coating of ZnO nanorod array improved the photovoltaic properties. The addition of triblockcopolymer as pore former in TiO2 coating was effective to increase the photovoltaic efficiency. The control of the concentration of TiO2 slurry was also important for homogeneous penetration into ZnO nanorod array.抄録全体を表示PDF形式でダウンロード (1258K) -
鈴木 晴絵, 打越 哲郎, 小林 清, 古谷 健司, 鈴木 達, 目 義雄, 宗像 文男2012 年 59 巻 11 号 p. 626-630
発行日: 2012/11/15
公開日: 2013/01/11
ジャーナル オープンアクセスThe microstructure control of NiO-YSZ for SOFC anode was performed using rice starch as pore former. Positively-charged NiO-YSZ slurry and negatively-charge rice starch slurry were heterocoaglated and then filtrated to prepare green plates. The rice starch was burnt out by sintering in air and porous NiO-YSZ electrode was obtained. The surface of NiO-YSZ substrate was coated with conductive polypyrrole to give electric conduction that is essential for EPD processing. The GDC/LSGM/GDC laminar coating was conducted by sequential deposition on the same substrate. The electrolyte layers were easily sintered together on the anode without cracking and peering-off at the interfaces.抄録全体を表示PDF形式でダウンロード (1500K) -
加藤 清隆, 松本 章宏, 下島 康嗣, 細川 裕之2012 年 59 巻 11 号 p. 631-636
発行日: 2012/11/15
公開日: 2013/01/11
ジャーナル オープンアクセスOn the preparetion of Ti(C0.7N0.3)-19 mass%Mo2C-24 mass%Ni cermet, solid paraffin, liquid paraffin and wax-emulsion were selected for the aid of press-molding. The properties of green and sintered compacts using these molding aids were investigated. The obtained results were summrized as follows. (1) As the result of thermal dewaxing for φ 50 mm×H 50 mm columnar-shaped green compact, the cracks on the compact after dewaxed was hard to occur using liquid paraffin and wax-emulsion. (2) The green compact by wax-emulsion had higher bending strength than those by other molding aids. (3) The sintered compact by liquid paraffin had more homogeneous microstructure and higher transverse rapture strength of 1.59 GPa than those by other molding aids. (4) The addition of deflocculant to the wax-emulsion decreased the viscosity of suraly after wet milling and enhanced the transverse rapture strength of the sintered compact to 1.88 GPa.抄録全体を表示PDF形式でダウンロード (1521K) -
松田 哲志, 木村 禎一, 松原 秀彰2012 年 59 巻 11 号 p. 637-644
発行日: 2012/11/15
公開日: 2013/01/11
ジャーナル オープンアクセスTungsten (W) used in cemented carbide tools is one of rare metals. As there is some concern about securing its stable supply, the development of W substituted materials is required. For the development of the substituted materials for tungsten carbide (WC)-based cemented carbide, new titanium carbonitride (Ti(C, N))-based cermets and new coating technology have been studied for applying them to cutting tools and wear- resistant tools. Thermal shock resistance is an important property of tool materials used in severer environment. However, evaluation method of thermal shock resistance has not been established for cermets. In order to develop a method to evaluate the thermal shock resistance, a constant heat flux method was studied by FEM calculation. Furthermore, irradiation experiments using a high power laser were conducted; laser beam was irradiated on the surface of thin specimens. The experimental results showed that a critical laser power for crack initiation can be used practically to evaluate the thermal shock resistance of cermets.抄録全体を表示PDF形式でダウンロード (997K) -
今井 久志, 李 樹豊, 近藤 勝義, 上坂 美治, 岡田 拓也, 山本 浩士, 高橋 基, 梅田 純子2012 年 59 巻 11 号 p. 645-651
発行日: 2012/11/15
公開日: 2013/01/11
ジャーナル オープンアクセスIn this study, microstructure and mechanical properties of Cu-40Zn brass alloy with 0.5 mass% Cr additive produced by powder metallurgy (P/M) were investigated.Cu-40Zn-0.5Cr and Cu-40Zn brass powder were made by water-atomization process, and used as raw materials. These powder compacts were consolidated by hot extrusion at various temperatures. Yield stress of Cu-40Zn-0.5Cr extruded at 773 K was 514.6 MPa, while that of the conventional Cu-40Zn extruded at the same temperature was 332.6 MPa. Solid solution of chromium in the Cu-40Zn-0.5Cr brass alloy extruded at 773 K was about twice as that in the same brass alloy extruded at 873 K. The ratio of solid solution strengthening by chromium additives was 130 MPa/mass%[Cr]. The grain size of extruded materials increased with increasing the extrusion temperature.抄録全体を表示PDF形式でダウンロード (1603K) -
Koki KANNO, Takahiro YAMADA, Hisanori YAMANE2012 年 59 巻 11 号 p. 652-660
発行日: 2012/11/15
公開日: 2013/01/11
ジャーナル オープンアクセスTiC0.7 and Mo2C powders were prepared by heating Ti-C and Mo-C compacts and Li or Na at temperatures of 800-900°C for 12 h in an Ar atmosphere. These temperatures were 200-350°C lower than those at which Ti and Mo fully reacted with C without the addition of Li or Na. The grain size of the TiC0.7 and Mo2C powders was close to that of the source metal powders. In the Tm-C systems (Tm = Zr, V, Nb, Ta, Cr, and Mn), the addition of Li or Na to Tm-C compacts enhanced the formation of ZrC, VC, NbC, TaC, Cr7C3, and Mn23C6 at 800°C. On the other hand, no effect was observed for the formation of carbides in the systems with Tm = Fe, Ru, Hf, W, and Re.抄録全体を表示PDF形式でダウンロード (1205K)
本会記事
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2012 年 59 巻 11 号 p. Pref11_1-
発行日: 2012/11/15
公開日: 2013/01/11
ジャーナル オープンアクセスPDF形式でダウンロード (139K)
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