共著者あり。共著者名: 亘理文夫，今井徹，山方秀一，小林雅博. 日本歯科理工学会, 豊泉裕，亘理文夫，今井徹，山方秀一，小林雅博 = TOYOIZUMI, Hiroshi ; WATARI, Fumio ; IMAI, Tohru ; YAMAGATA, Shuichi ; KOBAYASHI, Masahiro, 光重合法による曲げおよびねじり剛性を有する審美性矯正ワイヤーの試作 = Fabrication of Aesthetic Wires with Flexural and Torsional Stiffness by Photo Curing Method, 歯科材料・器械 = The Journal of the Japanese Society for Dental Materials and Devices, 18(6), 1999 NOV, pp.429-440 / Hokkaido University (北海道大学) / 博士 / 歯学

科学研究費補助金　研究種目：若手研究(A) 課題番号：18685013 研究代表者：忍久保 洋　研究期間：2006-2008年度

In this dissertation, BaTiO3 nanocrystals, Bi4Ti3O12 nanostructured microspheres, and cosubstituted Bi4Ti3O12 nanoparticles and ceramics were prepared using solvothermal, hydrothermal and citrate-gel methods. The ferroelectric properties of the prepared cosubstituted Bi4Ti3O12 ceramics were studied using P–E hysteresis loop, leakage, and polarization fatigue measurements. A two-phase solvothermal synthesis approach for the preparation of hydrophobic BaTiO3 nanocrystals was developed. The two-phase method is based on the growth of nanocrystals at the oil/water interface by the reaction between metal surfactant complexes in the oil phase and a mineralizer in the water phase. Three kind of organic solvents, hexadecene, toluene, and heptane were used as the oil phase and compared to each other with respect to the product quality. The BaTiO3 particles are crystalline with a mean size of 3.7 nm and can be dispersed in a variety of organic solvents forming highly transparent dispersions. A hydrothermal method was developed for the synthesis of Bi4Ti3O12 nanostructured microspheres consisting of granular nanoparticles and nano-platelets. The precursor powder was prepared using a diethylene glycol mediated coprecipitation method. Tailoring of the morphology was achieved by changing the precursor quantity, sodium hydroxide concentration, and reaction time. The formation mechanism of the nanostructured microspheres probably involves aggregation, followed by dissolution and recrystallization. Bi3.25Pr0.75Ti2.97V0.03O12 (BPTV) and Bi3.25La0.75Ti3-xMxO12, (BLTMx, M = Mo, W, Nb, V, x = 0.0–0.12) ferroelectric nanoparticles and ceramics were synthesized using a modified citrate-gel method that has a crystallization temperature as low as 450 °C. The synthesized nanoparticles were spherical ranging from 30 to 100 nm. Except Nb5+, other donor cations were introduced using the corresponding oxides that have advantages in terms of high purity, low cost, and availability. The Bi3.25Pr0.75Ti2.97V0.03O12 ceramic is orthorhombic and its 2Pr and 2Ec values measured at 300 kV/cm were 35 μC/cm2 and 148 kV/cm respectively. The texture, microstructure, and ferroelectric properties of the prepared Bi3.25La0.75Ti3-xMxO12, (BLTMx, M = Mo, W, Nb, V, x = 0.0–0.12) ceramics depend on x. The maximum 2Pr (30–32 μC cm−2) was achieved at an optimum cosubstitution level (x = 0.025 for M6+, x = 0.03 for M5+). The high remanent polarization, low leakage current, and low polarization fatigue render the prepared ceramics promising for practical applications.

科学研究費補助金 研究種目:一般研究(B) 課題番号:04452280 研究代表者:金武 直幸 研究期間:1992-1993年度

摘要 i Abstract ii 誌謝 iv 表目錄 vii 圖目錄 1 一、 緒論 6 1-1前言 6 1-2研究動機與目的 7 1-3氫氧化鋁介紹 8 1-3-1氫氧化鋁結構 9 1-3-2氫氧化鋁之應用 10 1-4氧化鋁介紹 11 1-4-1氧化鋁晶型及結構 13 1-4-2氧化鋁之應用 16 二、 文獻回顧 17 2-1電漿定義及特徵 17 2-1-1非熱電漿之理論 21 2-1-2液相脈衝電漿之原理 24 2-1-3顆粒形成流程 28 2-1-4電漿法製備無機物粉末 30 2-2 製備α相氧化鋁粉末 41 2-2-1拜耳法 43 2-2-2溶膠凝膠法 48 2-2-3水熱法 50 2-2-4機械球磨法 56 2-2-5沉澱法 57 2-2-6燃燒法 59 三、 實驗方法與步驟 60 3-1實驗藥品與設備 60 3-2研究內容 63 3-3實驗流程與架構 65 3-4 本實驗設計之綠能特色 68 四、 結果與討論 69 4-1 氫氧化鋁之產量及反應機構 69 4-2氫氧化鋁之X-Ray繞射儀分析(X-Ray Diffractometer,XRD) 74 4-3氫氧化鋁之EDS(X-Ray energy dispersive spectrometer)分析 77 4-4氫氧化鋁之FE-SEM分析 78 4-5氫氧化鋁之粒徑分析 91 4-6氫氧化鋁之比表面積分析分析 94 4-7氧化鋁之鍛燒溫度探討 98 4-8氧化鋁之持溫時間探討 105 4-9氧化鋁添加硝酸銀之探討 111 4-10氧化鋁添加造孔劑之探討 118 五、 結論 124 六、 未來工作 126 參考文獻 127

設備供應商在顯示器產業的市場競爭與策略: 以應用材料為例 / Flat panel display (FPD) is one of the most booming industries in the past decade. It shows everywhere in our life, such as TV, smartphone, laptop, car display, and public display. In the FPD plants, the manufacturing equipment is the critical portion to determine the performance of the production lines. Equipment suppliers combine advanced technologies into mass production tools, and eventually boost the innovation of information technology. In this thesis we will discuss about the market of display industry and the equipment market, followed by analysis of the strategy of equipment suppliers. We will use Applied Materials as the case, to see what their strategy to keep the leading position in the competitive market for over 20 years.

Kyoto University (京都大学) / 0048 / 新制・論文博士 / 博士(工学) / 乙第12460号 / 論工博第4042号 / 新制||工||1497(附属図書館) / 28070 / (主査)教授 岩田 博夫, 教授 伊藤 紳三郎, 教授 辻井 敬亘 / 学位規則第4条第2項該当

Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第16792号 / 工博第3513号 / 新制||工||1531(附属図書館) / 29467 / 京都大学大学院工学研究科建築学専攻 / (主査)教授 上谷 宏二, 教授 竹脇 出, 教授 金子 佳生 / 学位規則第4条第1項該当

Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第17566号 / 工博第3725号 / 新制||工||1568(附属図書館) / 30332 / 京都大学大学院工学研究科材料工学専攻 / (主査)教授 松原 英一郎, 教授 杉村 博之, 教授 邑瀬 邦明 / 学位規則第4条第1項該当

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第22445号 / 工博第4706号 / 新制||工||1735(附属図書館) / 京都大学大学院工学研究科材料工学専攻 / (主査)教授 宇田 哲也, 教授 田中 功, 教授 安田 秀幸 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DGAM