2025/04/02 更新

写真a

サキダ シンイチ
崎田 真一
SAKIDA Shinichi
所属
学術研究院教育研究マネジメント領域(保健・安全衛生・環境) 准教授
職名
准教授
外部リンク

学位

  • 博士(工学) ( 京都大学 )

研究キーワード

  • Ion-exchange

  • Optical property

  • NMR

  • Structure

  • Glass

  • Optical waveguide

  • Environment

  • ガラス

  • 光導波路

  • 環境

  • イオン交換

  • 光物性

  • NMR

  • 構造

研究分野

  • ナノテク・材料 / 基礎物理化学

  • ナノテク・材料 / 無機・錯体化学

  • ナノテク・材料 / 無機材料、物性

学歴

  • 京都大学    

    - 1999年

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    国名: 日本国

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  • 京都大学   Graduate School, Division of Engineering   Division of Molecular Engineerign

    - 1999年

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  • 京都大学   Faculty of Engineering   School of Industrial Chemistry

    - 1994年

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    国名: 日本国

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  • 京都大学   Faculty of Engineering   Department of Industrial Chemistry

    - 1994年

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経歴

  • - Associate Professor,Environmental Management Center,Okayama University

    2017年

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  • - 岡山大学環境管理センター 准教授

    2017年

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  • 岡山大学   Environmental Management Center

    2008年 - 2017年

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  • Assistant Professor,Environmental Management Center,Okayama University

    2008年 - 2017年

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所属学協会

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論文

  • Effect of bond valence sum on the structural modeling of lead borate glass

    Masaaki Nagao, Shinichi Sakida, Yasuhiko Benino, Tokuro Nanba, Atsushi Mukunoki, Tamotsu Chiba, Takahiro Kikuchi, Tomofumi Sakuragi, Hitoshi Owada

    Journal of Non-Crystalline Solids   592   2022年9月

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    掲載種別:研究論文(学術雑誌)  

    The structural model of 66.7PbO-33.3B2O3 glass was constructed using a reverse Monte Carlo (RMC) method, in which bond valence sum (BVS) was added as a constraint condition to suppress formation of unrealistic local structures. Based on the crystal structures, the optimal BVS calculating conditions were determined. As a result, BVS distributions with small deviation were successfully achieved without lowering the reproducibility of other experimental constraints. The geometric asymmetry of PbOn polyhedra was evaluated from the eccentric distance between Pb and gravity center of oxygen atoms. The average eccentric distance was shorter than that in the lead borate crystals, indicating less asymmetry of PbOn units in the RMC glass model. The connectivity between BOn and PbOn units was investigated. It was consequently concluded that the glass had a different network structure from the crystal with the same composition, which might be due to the different chemical bonding character between the lead borate glasses and crystals.

    DOI: 10.1016/j.jnoncrysol.2022.121751

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  • Effect of TiO2 addition on the distribution of phosphorus associated with phase separation of borosilicate glasses

    Y. Ohtsuki, S. Sakida, Y. Benino, T. Nanba

    Ceramic Transactions   231   145 - 149   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:American Ceramic Society  

    Behavior of phosphorus associated with phase separation and the effect of TiO2 addition on the phosphorus distribution were investigated in Na2O-B2O3-SiO2 ternary glass system. After heat treatment, phase separation by spinodal decomposition was commonly observed. In the phase separation of TiO2-free glasses, phosphorus was preferentially distributed into B2O3-rich phase, and after TiO2 addition, phosphorus distribution into SiO 2-rich phase was also observed. With increasing TiO2 content, the amount of phosphorus distributed into SiO2-rich phases increased up to 90%. 31P MAS NMR indicated that phosphorus in the glasses was mainly present in negatively-charged Q2 units with terminal oxygen atoms, and in the TiO2-containing glasses, Q 1 or Q0 units containing P-O-Ti bond were confirmed. Despite the formation of negatively-charged Q1 or Q0 units, phosphorus was distributed into SiO2-rich phase, which was due to the distribution of Ti4+ ions with higher coordination numbers acting as network modifiers.

    DOI: 10.1002/9781118472590.ch16

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  • Functional and structural characterizations of fresnoite glass-ceramics oriented with usttechnique

    Y. Benino, A. Endo, S. Sakida, T. Nanba

    Ceramic Transactions   231   161 - 165   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:American Ceramic Society  

    Transparent glass ceramics with highly oriented surface crystalline layers of fresnoite Ba2TiSi2O8 were prepared by heat treatment of precursor glasses in BaO-TiO2-SiO2 system. The orientation along c-axis of fresnoite crystals normal to the glass surface was evaluated by the surface XRD patterns, and it was remarkably enhanced by ultrasonic surface treatment (UST) before the crystallization using fresnoite powder suspension in water. The effect of UST disappeared after heat treatment in the glass transition region, and the mechanism of UST was discussed on the basis of the persistence at elevated temperatures.

    DOI: 10.1002/9781118472590.ch18

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  • Fabrication and characterization of Er3+-doped tellurite glass waveguides by Ag+-Na+ ion-exchange method using a dry electromigration process

    S. Sakida, K. Kimura, Y. Benino, T. Nanba

    Ceramic Transactions   231   201 - 207   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:American Ceramic Society  

    Planar waveguides were prepared on 12Na2O·10NbO 2.5·25WO3·53TeO2·1Er 2O3 ([NbWEr]) substrate glass by Ag+-Na + ion-exchange using a dry electromigration process. The optical properties of the waveguides were characterized and compared with those of [NbWEr] glass waveguides prepared by Ag+-Na+ ion-exchange by thermal diffusion. After ion-exchange by both a dry electromigration process and thermal diffusion, the transmittance of the glasses slightly decreased from that of the [NbWEr] substrate glass but frosting was not observed on these ion-exchanged glasses. The depth of the waveguide fabricated at 300°C by a dry electromigration process was about 8 μm and deeper than that at 380°C by thermal diffusion. On the [NbWEr] glass ion-exchanged at 300°C by a dry electromigration process, the stains seen in the [NbWEr] glass ion-exchanged at 380°C by thermal diffusion were hardly observed. Therefore, the dry electromigration process is promising due to the reduction of the process temperature and fewer stains.

    DOI: 10.1002/9781118472590.ch24

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  • Molecular orbital calculation of the Si NMR chemical shift in borosilicates: The effect of boron coordination to SiO4 units

    T. Nanba, Y. Asano, Y. Benino, S. Sakida, Y. Mima

    Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B   50 ( 5 )   301 - 304   2009年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Borosilicate cluster models were constructed, and the 29Si NMR chemical shift was estimated by molecular orbital calculations. For Q 4 species (an SiO4 unit consisting of four bridging oxygen atoms), a higher frequency shift was confirmed due to the replacement of the surrounding SiO4 with BO4 units, and for Q4 species associated with more than one BO4 unit, the chemical shifts were nearly identical to those for Q3 species (an SiO4 unit including one nonbridging oxygen) in alkali silicates. The chemical shifts of Q4 species in borosilicates were interpreted in terms of the change in bond angle of Si-O-(Si,B4) bridges. A change in chemical shift anisotropy of Q4 species was also found. The Q4 species associated with two BO4 units indicated an anisotropy maximum, which was smaller than the anisotropy of Q3 species.

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書籍等出版物

  • Studies on Structure of Tellurite Glasses

    A doctoral dissertation submitted to the Graduate School Kyoto University  1999年 

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MISC

  • 鉛ホウ酸塩の多様な局所構造に関する化学結合状態評価

    長尾正昭, 崎田真一, 紅野安彦, 難波徳郎, 椋木敦, 千葉保, 菊池孝浩, 桜木智史, 大和田仁

    日本セラミックス協会年会講演予稿集(Web)   2023   2023年

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  • スズリン酸塩系ガラスの逆モンテカルロ構造モデルにおける局所構造評価

    長尾正昭, 崎田真一, 紅野安彦, 難波徳郎

    日本セラミックス協会秋季シンポジウム講演予稿集(Web)   35th   2022年

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  • 脱リンスラグの還元溶融に伴うリンの分配挙動

    横山晃青, 崎田真一, 紅野安彦, 難波徳郎

    セラミックス基礎科学討論会講演要旨集   59th (CD-ROM)   2021年

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  • 塩化物添加による土壌中の有害元素(Pb,Cd,Cr)の揮発挙動

    松葉和哉, 崎田真一, 紅野安彦, 難波徳郎

    セラミックス基礎科学討論会講演要旨集   59th (CD-ROM)   2021年

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  • ファイバ延伸処理によるガラスの異方性発現挙動の調査

    三宅鴻大, 崎田真一, 紅野安彦, 難波徳郎

    セラミックス基礎科学討論会講演要旨集   59th (CD-ROM)   2021年

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講演・口頭発表等

  • Pb-B-O-X系結晶(X=Cl, Br, I)の密度汎関数理論計算と原子間ポテンシャル導出

    藤原祥, 難波徳郎, 紅野安彦, 崎田真一

    第30回ヤングセラミスト・ミーティングin中四国, 徳島大学 (徳島市)  2024年12月 

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    開催年月日: 2024年12月

    記述言語:日本語   会議種別:ポスター発表  

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  • Structural Modeling of Bismuth-Based Glasses by Using Density Functional Theory and Molecular Dynamics Simulations

    L. Yang, Y. Benino, T. Nanba, S. Sakida

    The 38th International Japan-Korea Seminar on Ceramics, ACROS Fukuoka, Fukuoka, Japan, October 31 - November 3, 2024. 

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    開催年月日: 2024年10月31日 - 2024年11月3日

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  • Effect of bond valence sum constraints on the structural modeling of lead borate glass

    M. Nagao, S. Sakida, Y. Benino, T. Nanba, A. Mukunoki, T. Chiba, T. Kikuchi, T. Sakuragi

    The 13th Pacific Rim Conference of Ceramic Societies, Okinawa, Japan  2019年 

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    開催年月日: 2019年10月27日 - 2019年11月1日

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  • 都市ごみ溶融スラグのリサイクルプロセスの開発

    溝口昂毅, 崎田真一, 紅野安彦, 難波徳郎

    第30回ヤングセラミスト・ミーティングin中四国, 徳島大学 (徳島市)  2024年12月 

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  • 放射性ヨウ素固定化ガラス及び関連ガラスの構造モデルの評価

    宮脇蘭, 難波徳郎, 紅野安彦, 崎田真一

    第30回ヤングセラミスト・ミーティングin中四国, 徳島大学 (徳島市)  2024年12月 

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担当授業科目

  • 安全衛生入門 (2024年度) 第4学期  - 金5~6