| 特集-新炭素系材料- Rev. High Pressure Sci. Technol. 4-4,274-279(1995) |
| フラーレンの結晶構造と相転移 Crystal Structures and Phase Transitions of Fullerenes |
| 斎藤 弥八 Yahachi SAITO |
| Fullerenes, a new allotrope of carbon, are hollow spherical all carbon molecules composed of six-membered and five-membered rings. Structural studies on C60 and C70 in the solid state at ambient and high pressure are reviewed. Phase transitions under high pressures are associated with molecular rotation, orientational ordering, polymerization, and/or crushing of molecules. Tentative p-T phase diagrams for solid C60 and C70 are given. Under appropriate pressure and temperatures, fullerenes in the solid state transform to polymers and diamond. Bulk moduli at low pressures ( ＜1GPa)are also summarized. [fullerenes, C60, C70, crystal structure, phase transition, polymer, diamond, bulk modulus] |
| 〒514 三重県津市上浜町1515 三重大学工学部電気電子工学科 Mie University, Department of Electrical and Electronic Engineering, 1515 Kamihama-cho, Tsu 514 |
| 特集-新炭素系材料- Rev. High Pressure Sci. Technol. 4-,280-286(1995) |
| B-C-N系新物質の魅力と高圧力 New Materials Based on the B-C-N Compositions and Synthesis Processes at High Pressure |
| 若槻 雅男 Masao WAKATSUKI |
| Materials composed of light elements, such as diamond, cubic BN, borides, carbides and nitrides, show extreme features in mechanical, thermal, electronic and optical properties based on small and light atoms strongly bonded to each other. It seems various compositions can be realized from the same combination of elements. It also seems that there are still many materials left for new discovery in this field of materials. Modern extreme condition techniques, including static and dynamic high pressures have revealed several new materials with the B-C-N compositions. [diamond, cubic BN, solid solutions, light elements, periodic compounds, B-C-N-O system] |
| 〒305-8565 茨城県つくば市東1-1 物質工学工業技術研究所極限反応部 Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8565 |
| 特集-新炭素系材料- Rev. High Pressure Sci. Technol. 4-4,287-293(1995) |
| 電気・光機能性有機材料の高圧合成 High-Pressure Synthesis of Organic Materials for Optoelectronics |
| 小島 由継 Yoshitsugu KOJIMA |
| New cyclic conjugated oligomers were synthesized by reacting diphenyldiacetylene and phenylacetylene under high pressure below 1 GPa. The optical limiting properties of the oligomers were investigated. At low input fluence, the transmittance of the toluene solution obeyed the Beer-Lambert law. Above the threshold of the input fluence, the transmittance decreased with input fluence. The oligomers had an optical limiting property. Furthermore, a unique class of conjugated compounds composed of the derivative of condensed polycyclic aromatic compound with the phenyl group and diphenyldiacetylene oligomer was synthesized with appearance of a gas by annealing of diphenyldiacetylene under elevated pressure. The electrorheological(ER) effect of the suspension of the compound showed the high-temperature working limit to be at least 100℃. [high pressure, oligomer, cyclic, optical limiting, diphenydiacetylene, phenylacetylene, electrorheological effect, condensed polycyclic aromatic compound] |
| 〒480-1192 愛知郡長久手町大字長湫字横道41-1 ?竃L田中央研究所 Toyota Central Research & Development Laboratories, Inc., Nagakute-cho, Aichi-gun, Aichi 480-1192 |
| 特集-新炭素系材料- Rev. High Pressure Sci. Technol. 4-4,294-301(1995) |
| 衝撃圧縮による超高圧・超高温・超急冷法と炭素新相の探索 Producing High Pressure/High Temperature/Rapid Quenching Condition and Exploring New Phases of Carbon by Shock Compression |
| 近藤 建一1 平井 寿子2 Ken-ichi KONDO, Hisako HIRAI |
| Recent trends in shock compression research and essential points of view are briefly reviewed. Such aspects have led to the development of SCARQ(Shock Compression and Rapid Quenching) method for exploring new materials, especially carbon. Some examples of new carbon phases and applications to investigating the transition mechanism from graphite to diamond are also reviewed in order to verify the SCARQ method. [shock compression, rapid quenching, shock chemistry, high pressures and high temperatures, carbon, diamond, new materials] |
| 1〒226-8503 横浜市緑区長津田町4259 東京工業大学応用セラミックス研究所 Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503 2〒305-8571 つくば市天王台1-1-1 筑波大学地球科学系 |
| 特集-新炭素系材料- Rev. High Pressure Sci. Technol. 4-4,302-307(1995) |
| 非金属触媒を助剤とするダイヤモンドの焼結 Sintering of Diamond Using Non-metallic Catalyst as a Sintering Agent |
| 赤石 實 Minoru AKAISHI |
| Synthesis of polycrystalline diamond compact(PCD) with high heat resistant properties is a big challenge for specialized abrasive application such as in cutting tools, in rock drills etc. The present paper reviews the sintering behavior of natural diamond powder-magnesium carbonate system under the conditions of 7.7 GPa and 1850-2450℃ and its thermal resistant properties. Neither graphitization nor crackings were observed either in or on the compact after the heat treatment between 900〜1400℃ for 30 min in vacuum. PCD after the treatment at 1400℃ had a high hardness of 55 GPa in Knoop hardness scale. This result suggests that magnesium carbonate is a superior additive for synthesis of PCD with high heat resistant properties. [sintered diamond, magnesium carbonate, heat resistant property, high-pressure and high-temperature] |
| 〒305-0044 茨城県つくば市並木1-1 無機材質研究所 National Institute for research in Inorganic Materials, 1-1 Namiki, Tsukuba-shi Ibaraki, 305-0044 |
| 特集-新炭素系材料- Rev. High Pressure Sci. Technol. 4-4,308-314(1995) |
| 高純度ダイヤモンド単結晶の合成 Synthesis of High Purity Diamond Single Crystal |
| 佐藤 周一 角谷 均 Shuichi SATOH, Hitoshi SUMIYA |
| This paper presents the outline of the temperature gradient method at high pressures and high temperatures for the epitaxial growth of a high purity diamond single crystal. Several elimination techniques of the impurities (mainly nitrogen atoms) in a single crystal are discussed. High purity diamond single crystals, containing impurities as low as 0.1 ppm, are successfully grown up to 1 or 2 carats by adding titanium and copper in the solvent bath in the temperature gradient method. In order to reduce the nitrogen content of a solvent bath, titanium is added as a nitrogen getter, while copper is added to decompose titanium-carbide which is contained in a crystal as bulky inclusion by adding of titanium. [synthetic diamond crystal, high purity diamond crystal, type IIa diamond, high pressure and high temperature method, temperature gradient method] |
| 〒664-0016 兵庫県伊丹市昆陽北1-1-1 住友電気工業（株） 伊丹研究所 Itami Research Laboratories, Sumitomo Electric Industries Ltd. 1-1-1 Koya-Kita,Itami,Hyogo, 664-0016 |
| 解説 Rev. High Pressure Sci. Technol. 4-4,315-321(1995) |
| 量子スピン梯子化合物−1次元から2次元へのクロスオーバー− Quantum Spin Ladder Compounds -Crossover from One to Two Dimensionality- |
| 高野 幹夫 Mikio TAKANO |
| Theoretical and experimental aspects of a class of new cupric oxides called spin ladder compounds will be summarized, where the ladders are made from antiferromagnetic chains of S = 1/2 spins by connecting them together with inter-chain antiferromagnetic bonds. Hole carriers doped into even-leg ladders have been predicted to pair, and possibly superconduct. By means of high pressure synthesis at 3-6 GPa and 1200 K, typically, two kinds of 2-leg ladder compounds SrCu2O3 and LaCuO2.5 and a 3-leg ladder compound Sr2Cu3O5 have been prepared. Their magnetic and electrical properties will be compared with theoretical predictions. [high-Tc superconductivity, cupric oxides, spin ladder, dimensional crossover, high pressure synthesis] |
| 〒611-0011 京都府宇治市五ケ荘 京都大学化学研究所無機素材化学研究部門?V Institute for Chemical Research, Kyoto University, Gokasho, Kyoto 611-0011 |
| 実験ワンポイント Rev. High Pressure Sci. Technol. 4-4,322-323(1995) |
| クランプ式DACのための簡易Ar液化装置 An Apparatus for Condensing Ar in a Clamp-Type Diamond Anvil Cell |
| 松田 康弘1 黒田 規敬2 Yasuhiro MATSUDA, Noritaka KURODA |
| A simple apparatus for condensing argon in a clamp-type diamond anvil cell is reported. This apparatus enables us to conveniently use condensed argon as the pressure-transmitting medium. [condensed argon, clamp-type DAC, pressure-transmitting medium, low temperature] |
| 1 〒277-8581 柏市柏の葉5-1-5 東京大学物性研究所三浦研究室 Tokyo University, 5-1-5, Kashiwanoha Kashiwa 277-8581 2 〒860-8555 熊本市黒髪2-39-1 熊本大学工学部知能生産システム工学科 Kumamoto University 2-39-1 Kurokami, Kumamoto 860-8555 |
| 実験ワンポイント Rev. High Pressure Sci. Technol. 4-4,324-326(1995) |
| 流体および混合流体の臨界定数の精密測定 Precise Measurement of Critical Parameters for Fluids and Fluid Mixtures |
| 山田 研治1 中島 誠之 末廣 能史 上松 公彦2 Kenji YAMADA, Masayuki NAKAJIMA, Yoshifumi SUEHIRO, Masahiko UEMATSU |
| An experimental apparatus for precise measurement of the critical parameters for fluids and fluid mixtures is described in detail. The apparatus can be used in the temperature range from 250 to 500 K at pressures up to 100 MPa. [critical parameters, fluids and fluid mixtures, optical cell, volumometer] |
| 1〒554-0051 大阪市此花区酉島6-19-9 大阪ガス（株）開発研究部エネルギー技術研究センター 2〒223-8522 横浜市港北区日吉3-14-1 慶應義塾大学理工学部 機械工学科 Department of Mechanical Engineering, Keio University, Hiyoshi, 3-14-1, Kohoku-ku, Yokohama 223-8522 |
〒606-0805
京都市左京区下鴨森本町 15 (財)生産開発科学研究所内
日本高圧力学会事務局
Tel (075)721-0376 Fax (075)723-9629
koatsu@mbox.kyoto-inet.or.jp