| 解説 Rev. High Pressure Sci. Technol. 6-3,148-153(1997) |
| 圧力制御の高速性を利用した結晶成長の微小重力実験 A Microgravity Experiment of Crystal Growth Utilizing High Speed of Pressure-Control |
| 沢田 勉 Tsutomu SAWADA |
| This article reviews works by the author and his colleagues where a novel technique for quick change of supersaturation by dynamic pressure-control (DPC) method is used for studies of crystal growth. Since the DPC method can change supersaturation much faster than the ordinary temperature-control method, it is very suitable for quick experiments in microgravity. Here we report an in situ observation experiment of a dendritic crystal growth in microgravity by the DPC method. [ microgravity, crystal growth, dendrite, diffusion, high pressure ] |
| 〒305 つくば市並木 1-1 無機材質研究所 National Institute for Research in Inorganic Materials. I -1 . Namiki. Tsukuba. Ibaraki 305 |
| 解説 Rev. High Pressure Sci. Technol. 6-3,154-158(1997) |
| 新しい極限状態: 超重力場の発生と物質科学への応用 Generation of a New Extreme Condition: Ultra-Strong Acceleration Field (Mega-Gravity Field) and the Applications to Materials Science |
| 真下 茂 Tsutomu MASHIMO |
| Strong acceleration field can realize the sedimentation of even atoms, and is expected to create a crystal chemical nonequilibrium state in multi-component condensed matter. Such phenomena may be useful in many fields such as metallurgy, solid state chemistry, polymer physics, materials processing, nucleonics, as well as biochemistry. However, the researches of microscopic phenomena in solids under strong acceleration field have not ever been undertaken, being now an unprecedented area. In this article, we focus our attention on ultra-strong acceleration field (mega-gravity field) as a new extreme condition for materials science. The effects of strong acceleration field on atoms or crystal state, etc. in condensed matter and the possible applications to materials science are discussed on the basis of the theoretical analyses. The previous ultracentrifuge machines are reviewed, and an ultracentrifuge apparatus to generate a strong acceleration field of over 1 million (1x106) g at high temperature is described. The mega-gravity field experiment for solids is now started by using the apparatus. [strong acceleration field, ultracentrifugation, sedimentation of atoms, diffusion, nonequilibrium state, control of composition, graded materials, isotope, mega-gravity field] |
| 〒860-8555 熊本市黒髪2-39-1 熊本大学衝撃・極限環境研究センター High Energy Rate Laboratory, Faculty of Engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555 |
| 解説 Rev. High Pressure Sci. Technol. 6-3,159-166(1997) |
| 超音波による有機液体の分解反応 Decomposition of Organic Liquids by Ultrasound |
| 加藤 隆二 Ryuzi KATOH |
| In this article, an effect of ultrasound on chemical reactions is reviewed. The sonochemical reaction proceeds at a hot spot produced by cavitation of bubble, i.e., creation and collapse of a bubble in liquid. Temperature and pressure at the hot spot exceed 5000 K and 100 MPa, respectively, therefore, pyrolysis of solvent can occur. We present experimental technique and our recent results of sonochemical decomposition of organic liquids and synthesis of C60 from liquid benzene. [sonochemistry, cavitation, hot spot, pyrolysis of benzene and C60 ] |
| 〒305 つくば市東 1-1 物質工学工業技術研究所極限反応部 National Institute of Materials and Chemical Research, 1- I Higashi, Tsukuba, Ibaraki 305 |
| 解説 Rev. High Pressure Sci. Technol. 6-3,167-175(1997) |
| フタロシアニン導体における圧力誘起電荷移動 Pressure-Induced Charge Transfer in Phthalocyanine Conductors |
| 薬師 久弥 米原 由華子 Kyuya YAKUSHI Yukako YONEHARA |
| Phthalocyanine conductor NiPc(As6)0.5 is a double-chain system: a metal chain and macrocyle chain coexist within the same molecular column. This characteristic structure produces a two-band system: a wide π-band and narrow d-band, which is located near the Fermi level of the wide π-band. In this system, high pressure tunes the energy level of this 3dz2-band, and induces a metal-ligand charge transfer from the 3dz2-band to π-band, which was verified by the absorption spectra of infrared, near-infrared, and visible region. The vacant state of the 3/4-filled π-band is continuously filled up to 7 GPa. According to the increase of the pressure non-metallic phase which exists below 40 K at ambient pressure evolves to almost room temperature around 1GPa. [pressure-induced charge transfer, metal-insulator transition, phthalocyanine, one-dimensional conductor, organic conductor, 2-band system, infrared spectrum, reflection spectrum, diamond anvil] |
| 〒444 愛知県岡崎市明代寺町字西郷中 38 分子科学研究所 総合研究大学院大学 Institute for Molecular Science and Graduate University of Advance Studies, Myodaiji. Okazaki, Aichi 444 |
| 論文 Rev. High Pressure Sci. Technol. 6-3,176-181(1997) |
| 水晶振動子を用いたポリスチレンに対する二酸化炭素の溶解度測定 Solubility Measurements of High Pressure CO2 into polystyrene by Quartz Crystal Microbalance |
| 三浦 恵一 大竹 勝人 黒沢 茂 菅田 孟 佐古 猛 中根 尭 佐藤 眞士1 辻 智也 日秋 俊彦2 本郷 尤2 Kei-ichi MIURA Katsuto OTAKE Shigeru KUROSAWA Tsutomu SUGETA Takeshi SAKO Takashi NAKANE Masahito SATO Tomoya TSUJI Toshihiko HIAKI Masaru HONGO |
| In this paper, the ability of quartz crystal microbalance (QCM) was considered about in situ measurement in high pressure fluid. Solubility and adsorption of high pressure carbon dioxide (CO2) to polystyrene(PS) were measured using a QCM as a detector at pressures up to 17 MPa at 313.2 K. The solubility and surface adsorption of CO2 increased almost linearly against activity of CO2. And it was found that the present method could be applied to higher pressure range than any other methods. The activity plot of solubility at various temperatures fell into one universal line. This may be very important because it suggests the possibility of obtaining the solubility at any temperature from only one measurement. [Quartz crystal microbalance, high pressure, solubility, activity, carbon dioxide, polystyrene, adsorption, electrode] |
| 1〒305-8565 つくば市東1-1 物質工学工業技術研究所統括研究調査官室 Department of Chemical Systems, National Institute of Materials and Chemical Research, 1-1 Higashi. Tsukuba. Ibaraki 305-8565 2〒275-8575 習志野市泉町1-2-1 日本大学生産工学部工業化学科 Graduate School of Industrial Technology, Nihon University, 1-2-1 izumicho, Narashino, Chiba 275-8575 |
| サロン Rev. High Pressure Sci. Technol. 6-3,182-186(1997) |
| 高圧食品開発物語（その2） -炊飯性に優れた加工玄米の製造方法- Story of Development of High-Pressure Processed Foods, Part 2 -A method of producing rapidly cookable processed unpolished rice- |
| 山崎 彬 Akira YANAZAKI |
| Whole-rice foods are well known to be beneficial for health. This is a story the development of our processed unpolished rice with excellent cookability, openly disclosing our failures in the course of these development. Our experience will hopefully be useful for any kind of rice research in the future. [high-pressure processed foods, whole-rice foods, processed unpolished rice] |
| 〒940-0056 長岡市呉服町1-4-5 越後製菓（株）総合研究所社長室 Research Institute, Echigo Seika Co.,Ltd., 1-4-5 Gohuku-cho Nagaoka-shi 940-0056 |
〒606-0805
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