MATSUOKA Jun

写真a

Title

Professor

Research Fields, Keywords

glass science, thermal properties, mechanical properties, inorganic materials

Mail Address

E-mail address

Graduating School 【 display / non-display

  • Kyoto University  Faculty of Engineering  Department of Industrial Chemistry  1985.03

Graduate School 【 display / non-display

  • Kyoto University  Graduate School, Division of Engineering  Master's Course  1987.03

Campus Career 【 display / non-display

  • University of Shiga Prefecture  School of Engineering  Department of Materials Science  Professor   2005.04 - Now

  • University of Shiga Prefecture  School of Engineering  Department of Materials Science  Associate Professor (as old post name)   2001.04 - 2005.03

  • University of Shiga Prefecture  School of Engineering  Department of Materials Science  Lecturer   1995.04 - 2001.03

Academic Society Affiliations 【 display / non-display

  • The Chemical Society of Japan

  • American Ceramic Society

  • The Ceramic Society of Japan

Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display

  • Inorganic materials/Physical properties

  • Basic chemistry

  • Inorganic industrial materials

 

Research theme 【 display / non-display

  • Glass Science (Thermal Properties, Mechanical Properties, Optical Properties)

    glass

Papers 【 display / non-display

  • Role of mixing thermodynamic properties on the Soret effect

    Tomohiro Kiyosawa, Masahiro Shimizu, Jun MATSUOKA, Kento Nakashima, Kenzo Sato, Masayuki Nishi, Yasuhiko Shimotsuma, and Kiyotaka Miura

    AIP Publishing  Journal of Chemical Physics  157   174501 -  2022.11

    10.1063/5.0122015  Joint Work  

    [Abstract]

    We demonstrate that the modified Kempers model, a recently developed theoretical model for the Soret effect in oxide melts, is applicable for predicting the composition dependence of the Soret coefficient in three binary molecular liquids with negative enthalpies of mixing. We compared the theoretical and experimental values for water/ethanol, water/methanol, water/ethylene glycol, water/acetone, and benzene/n-heptane mixtures. In water/ethanol, water/methanol, and water/ethylene glycol, which have negative enthalpies of mixing across the entire mole fraction range, the modified Kempers model successfully predicts the sign change of the Soret coefficient with high accuracy, whereas, in water/acetone and benzene/n-heptane, which have composition ranges with positive enthalpies of mixing, it cannot predict the sign change of the Soret coefficient. These results suggest that the model is applicable in composition ranges with negative enthalpies of mixing and provides a framework for predicting and understanding the Soret effect from the equilibrium thermodynamic properties of mixing, such as the partial molar volume, partial molar enthalpy of mixing, and chemical potential.

  • Composition-dependent sign inversion of the Soret coefficient of SiO<inf>2</inf>in binary borosilicate melts

    Shimizu M., Sato K., Nakashima K., Kiyosawa T., Matsuoka J., Shimotsuma Y., Miura K.

    Journal of Chemical Physics  Journal of Chemical Physics  156 (21)    2022.06

    10.1063/5.0090939  Joint Work  

    [Abstract]

    Using a laser-induced local-heating experiment combined with temperature analysis, we observed the composition-dependent sign inversion of the Soret coefficient of SiO2 in binary silicate melts, which was successfully explained by a modified Kempers model used for describing the Soret effect in oxide melts. In particular, the diffusion of SiO2 to the cold side under a temperature gradient, which is an anomaly in silicate melts, was observed in the SiO2-poor compositions. The theoretical model indicates that the thermodynamic mixing properties of oxides, partial molar enthalpy of mixing, and partial molar volume are the dominant factors for determining the migration direction of the SiO2 component under a temperature gradient.

  • Determination of thermodynamic and microscopic origins of the Soret effect in sodium silicate melts: Prediction of sign change of the Soret coefficient

    M. Shimizu, T. Fukuyo, J. Matsuoka, K. Nakashima, K. Sato, T. Kiyosawa, M. Nishi, Y. Shimotsuma, and K. Miura

    AIP Publishing LLC.  The Journal of Chemical Physics  154 (7)   074501 -  2021.02

    10.1063/5.0040513  Joint Work  Joint(The vice charge)

    [Abstract]

    The Soret effect in silicate melts has attracted attention in earth and material sciences, particularly in glass science and engineering, because a compositional change caused by the Soret effect modifies the material properties of silicate melts. We investigated the Soret effect in an Na2O–SiO2 system, which is the most common representative of silicate melts. Our theoretical approach based on the modified Kempers model and non-equilibrium molecular dynamics simulation was validated for 30Na2O–70SiO2(mol. %). The sign and order of the absolute values of the calculated Soret coefficients were consistent with the experimental values. The positive Soret coefficient of SiO2 in the SiO2-poor composition range was accurately predicted. Previous experimental studies have focused on SiO2-rich compositions, and only the negative sign, indicating SiO2 migration to the hot side, has been observed. In the SiO2-poor composition range, the Q0 structure was dominant and had four Si–O–Na bonds around an SiO4 unit. The Si–O–Na bond had high enthalpic stability and contributed to the large negative enthalpy of SiO2 mixing. According to our model, components with a large negative partial molar enthalpy of mixing will concentrate in the cold region. The microscopic and thermodynamic origins of the sign change in the Soret effect were determined.

  • Transition in deformation mechanism of aluminosilicate glass at high pressure and room temperature

    Osada K., Yamada A., Ohuchi T., Yoshida S., Matsuoka J.

    Journal of the American Ceramic Society  Journal of the American Ceramic Society  103 (12)   6755 - 6763  2020.12

    10.1111/jace.17429  Joint Work  

    [Abstract]

    Deformation experiments for 20(MgO or Na O)-20Al O -60SiO glasses were performed in simple shear geometry at 1.5-5 GPa and room temperature. An abrupt change in the thinning rate and the turning of the birefringence azimuth at a shear strain of γ = 1-2 indicate a transition of deformation mechanism from uniaxial compression aided by densification to shear flow in the glasses. The high-dense magnesium aluminosilicate glass showed strain softening controlled by the rearrangement of the tetrahedral network. On the other hand, low-dense sodium aluminosilicate glass deformed by packing-induced flow associated with densification and via the rearrangement of the tetrahedral network at lower and higher strains, respectively. The transition of the deformation mechanism was triggered by the limitations of the densification of the tetrahedral network. The difference of deformation mechanism brought about higher strain in magnesium aluminosilicate glass than sodium aluminosilicate glass at the same stress condition. Easiness of remarkable deformation, which relaxed residual stress, and high deformability contributed to the high ductility of the MgO-aluminosilicate glass. 2 2 3 2

  • Soret coefficient of a sodium germanate glass melt: Experiment, theory, and molecular dynamics simulation

    Nakashima K., Shimizu M., Matsuoka J., Fukuyo T., Kato H., Nishi M., Shimotsuma Y., Miura K.

    Journal of the American Ceramic Society  Journal of the American Ceramic Society  103 (11)   6208 - 6214  2020.11

    10.1111/jace.17375  Joint Work  

    [Abstract]

    The Soret effect is a diffusion phenomenon driven by a temperature gradient in a multicomponent system. This effect in condensed systems is not fully understood. Previously, we reported a theoretical model called “adjusted Kempers model” to predict the Soret coefficient in glass melts, and compared the experimental value to the theoretical value for 11Na O-89B O (mol%) melts. Here, molecular dynamics calculations, as well as theoretical and experimental values, are quantitatively compared in 10Na O-90GeO melts. We used a vertical tubular furnace to cause a temperature gradient and heated the sample from top side to reduce the natural convection. We measured the composition of 10Na O-90GeO glass samples after 45, 90, and 180 hours of heat treatment under a temperature gradient, and estimated the steady-state Soret coefficient near 1373 K to be 1.09 × 10  K . In addition, we calculated Soret coefficients to be 3.65 × 10  K and 1.85 × 10  K in theory and molecular dynamics calculation, respectively. The ratios between the experimental and theoretical Soret coefficients were 1.2 and 3.3 for 11Na O-89B O melts and 10Na O-90GeO melts, respectively. The difference in ratios may be attributed to the mass and size of diffusion species in the glass melts. 2 2 3 2 2 2 2 2 2 3 2 2 −3 −1 −3 −1 −3 −1

  • Effect of B2O3 substitution for SiO2 in alkali aluminoborosilicate glasses on chemical strengthening

    Hidekatsu Morozumi, Satoshi Yoshida, Jun Matsuoka

    日本セラミックス協会  Journal of the Ceramic Society of Japan  128 (1)   24 - 31  2020.01

    Joint Work  Joint(The vice charge)

  • Micro-Photoelastic Evaluation of Indentation-Induced Stress in Glass

    Keisuke Asai, Satoshi Yoshida, Akihiro Yamada, Jun Matsuoka, Andrei Errapart, Charles R. Kurkjian

    The Japan Institute of Metals and Materials  Materials Transactions    2019.01

    10.2320/matertrans.MD201903  Joint Work  Joint(The vice charge)

  • Soret coefficient of a sodium borate melt: Experiment with a vertical furnace and thermodynamic theory

    Shimizu M., Hosoya S., Kato T., Matsuoka J., Kato H., Nishi M., Hirao K., Shimotsuma Y., Miura K.

    Journal of the Ceramic Society of Japan  Journal of the Ceramic Society of Japan  126 (12)   997 - 1004  2018.12

    10.2109/jcersj2.18135  Joint Work  

    [Abstract]

    ©2018 The Ceramic Society of Japan The Soret effect or thermodiffusion is temperature-gradient-driven diffusion in a multicomponent system. A physical model to accurately predict the Soret coefficient of oxide melts has not yet been proposed. Here, for the first time, we report a quantitative comparison between experiment and theory concerning the Soret coefficient in binary glass-forming oxide melts. We measured the Soret coefficient of 11Na 2 O89B 2 O 3 (mol %) after 90- and 180-h heat treatment under a temperature gradient near 1200 K and estimated the Soret coefficient for the steady state. We used a vertical furnace to reduce the effect of natural convection on the Soret effect by heating the sample from the top side. The Soret coefficient estimated for the steady state near 1200 K was 5.12 © 10 13 K 11 , whereas that obtained by the adjusted Kempers model, in which we adjusted the original Kempers thermodynamic model for binary oxide melts, was 6.09 © 10 13 K 11 . The sign and order of magnitude were consistent, which suggests that the adjusted Kempers model is a promising model to explain the Soret effect and that the equilibrium thermodynamic parameters of partial molar volume, partial molar enthalpy, and chemical potential are important factors in the phenomenon.

  • Role of partial molar enthalpy of oxides on Soret effect in high-temperature CaO–SiO <inf>2</inf> melts

    Shimizu M., Matsuoka J., Kato H., Kato T., Nishi M., Visbal H., Nagashima K., Sakakura M., Shimotsuma Y., Itasaka H., Hirao K., Miura K.

    Scientific Reports  Scientific Reports  8 (1)    2018.12

    10.1038/s41598-018-33882-1  Joint Work  

    [Abstract]

    © 2018, The Author(s). The Soret effect or thermodiffusion is the temperature-gradient driven diffusion in a multicomponent system. Two important conclusions have been obtained for the Soret effect in multicomponent silicate melts: first, the SiO 2 component concentrates in the hot region; and second, heavier isotopes concentrate in the cold region more than lighter isotopes. For the second point, the isotope fractionation can be explained by the classical mechanical collisions between pairs of particles. However, as for the first point, no physical model has been reported to answer why the SiO 2 component concentrates in the hot region. We try to address this issue by simulating the composition dependence of the Soret effect in CaO–SiO 2 melts with nonequilibrium molecular dynamics and determining through a comparison of the results with those calculated from the Kempers model that partial molar enthalpy is one of the dominant factors in this phenomenon.

  • In-situ Raman Measurements of Silicate Glass during Vickers Indentation

    Satoshi Yoshida, Thu Huyen Nguyen, Akihiro Yamada, Jun Matsuoka

    The Japan Institute of Metals and Materials  Materials Transactions    2018.11

    10.2320/matertrans.MD201901  Joint Work  Joint(The vice charge)

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Books 【 display / non-display

Review Papers 【 display / non-display

  • Toward the International Year of Glass 2022: Expectations for Basic and Applied Research in Glass Science

    Jun Matsuoka

    The Chemical Society of Japan  Chemistry and Chemical Industry  75 (5)   327 - 329  2022.05

     Single Work  

  • Thermal Properties of Glass and Melts -Their Phisical Chemistry and Engineering

    Jun Matsuoka

    The Ceramic Society of Japan  Textbook of the 51th Summer Seminar of Glass Division    2019.08

     Single Work  

  • Structure and Properties of Glass Melts

    Jun Matsuoka

    The Technical Association of Refractories, Japan  TAIKABUTSU  70 (11)   532 - 539  2018.11

     Single Work  

  • Draw a Line between Two Points

     33 (123)   1 - 2  2018.03

     Single Work  

  • Properties of Glass Melt

     32 (1)   4 - 9  2017.03

     Single Work  

Conferences 【 display / non-display

  • Preliminary Study of the Effect of Iron Valence on the Viscosity of Iron-Containing Simplified Simulated Waste Glass

    The 4th Meeting on Nuclear Waste Glasses and Related Materials  2022.10

  • Characterization of Melt Properties for Improving the Glass Manufacturing Process

    The 35th Fall Meeting, The Ceramic Society of Japan  2022.09

  • Deformation behavior of borosilicate glass under shear stress

    The 35th Fall Meeting, The Ceramic Society of Japan  2022.09

  • Structure and physical property of dense aluminosilicate glass

    The 35th Fall Meeting, The Ceramic Society of Japan  2022.09

  • Why is Glass so Breakable? Atomistic Mechanism and Strengthening

    The 102nd CSJ Annual Meeting  2022.03

  • Indentation induced photoelastic patterns in oxide glasses: a numerical approach

    14th Pacific Rim Conference on Ceramic and Glass  2021.12

  • Mechanical property and the structure of Mg-borosilicate glass synthesized by container-less method

    The 62nd Symposium on Glass and Photonic Materials  2021.11

  • Thermal conduction of borosilicate glasses around the glass transition temperature

    The 62nd Symposium on Glass and Photonic Materials  2021.11

  • Synthesis of anisotropic borosilicate glasses and the structural modification induced by differential stress

    The 62nd Symposium on Glass and Photonic Materials  2021.11

  • Structural and property changes in CaSiO3 glass with densification

    The 34th Fall Meeting, The Ceramic Society of Japan  2021.09

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Academic Awards Received 【 display / non-display

  • Award of the Outstanding Papers Published in the JCerSJ in 2013

     Heat capacity measurements of 75SiO2-6B2O3-10Al2O3-9MO (M=Mg, Ca, Sr and Ba) glasses and melts  Celebration by Official journal of a scientific society or Academic Journal    Joint(The vice charge)  2014.06

  • Award of the Outstanding Papers Published in the JCerSJ in 2010

     Effect of B2O3 content on crack initiation under Vickers indentation test  Celebration by Official journal of a scientific society or Academic Journal    Joint(The vice charge)  2011.06