2023/09/19 更新

写真a

ヤマダ アキヒロ
山田 明寛
YAMADA Akihiro
所属
先端工学研究院
部局
工学部 材料化学科
職名
准教授
外部リンク

学位

  • 博士(理学) ( 2007年3月   愛媛大学 )

  • 修士(理学) ( 2004年3月   愛媛大学 )

  • 学士(理学) ( 2002年3月   愛媛大学 )

経歴

  • 滋賀県立大学   工学部 材料科学科   准教授

    2021年1月 - 現在

  • 滋賀県立大学   工学部 ガラス工学研究センター   講師

    2019年4月 - 2020年12月

所属学協会

  • 日本鉱物学科学会

    2009年4月 - 現在

  • 日本高圧力学会

    2003年4月 - 現在

研究分野

  • ナノテク・材料 / 無機・錯体化学

研究シーズ

  • ガラスの融液物性・熱物性と破壊現象の研究

論文

  • Densification of Sodium Borosilicate Glasses at Ambient Temperature: Structural Investigations by Solid-State Nuclear Magnetic Resonance and Raman Scattering 査読 国際誌

    Millena Logrado, Tomiki Inoue, Shingo Nakane, Yoshinari Kato, Hiroki Yamazaki, Akihiro Yamada, Hellmut Eckert

    The Journal of Physical Chemistry Letters   14   4471 - 4481   2023年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACS Publications   参加形態:共同(副担当)  

    Alkali-borosilicate glasses with composition (80-x)SiO2-xB2O3-20Na2O (10 ≤ x ≤ 30) were subjected to a 25 GPa compression and decompression at room temperature, resulting in density increases between 1.4% and 1.9%. The structural changes associated with this process have been investigated and compared with uncompressed glasses having the same thermal history. Systematic trends are identified, using Raman scattering and multinuclear solid-state Nuclear Magnetic Resonance (ssNMR). Perhaps counterintuitively, pressurization tends to increase the concentration of three-coordinated boron species (B(III) units) at the expense of fourcoordinated boron (B(IV) units). 23Na NMR spectra show a systematic shift toward higher frequencies in the pressurized glasses, consistent with shorter average Na−O distances. The results are consistently explained in terms of a breakage of Si−O−B4 linkages resulting in the
    formation of nonbridging oxygen species. Pressure effects on the spectra are reversed by annealing the glasses at their respective glass transition temperatures.

    DOI: 10.1021/acs.jpclett.3c00540

  • Synthesis of transparent polycrystalline jadeite under high pressure and temperature 査読

    Mitsu K., Irifune T., Ohfuji H., Yamada A.

    Journal of Mineralogical and Petrological Sciences   116 ( 4 )   203 - 210   2021年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Mineralogical and Petrological Sciences  

    Attempts to synthesize transparent polycrystalline jadeite have been made by direct conversion from bulk glass at pressures 10–20 GPa and temperatures 900–1300 °C using Kawai–type multianvil apparatus. The grain size of jadeite tends to decrease with increasing pressure, but we failed to synthesize polycrystalline jadeite with grain sizes in nano–regime (<100 nm) and obtained the sample with the smallest average grain size of ~ 240 nm at 20 GPa and 1300 °C for 20 min. Polycrystalline jadeite of the minimum grain size exhibits high optical transparency with a transmittance of ~ 70% for a typical wavelength in the visible region. The highest Vickers hardness (Hv) of 14.2 GPa was observed for the polycrystalline jadeite sample with the minimum grain size of ~240 nm, which is about 7% higher than the hardness (Hv = 13.3 GPa) of the sample with the largest grain size of ~ 390 nm. Further increases in optical transparency and hardness of polycrystalline jadeite would be realized if we get nano–polycrystalline samples by optimizing pressure, temperature, heating duration, etc. of the ultrahigh–pressure synthesis experiment.

    DOI: 10.2465/JMPS.210319

    Scopus

    その他リンク: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85117924638&origin=inward

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

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

    Journal of the American Ceramic Society   103 ( 12 )   6755 - 6763   2020年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of the American Ceramic Society  

    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

    DOI: 10.1111/jace.17429

    Scopus

    その他リンク: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85090438356&origin=inward

  • Pressure-induced variation of persistent luminescence characteristics in Y3Al5-xGaxO12:Ce3+–M3+ (M = Yb, and Cr) phosphors: opposite trend of trap depth for 4f and 3d metal ions 査読 国際誌

    Jumpei Ueda, Masaya Harada, Shun Miyano, Akihiro Yamada and Setsuhisa Tanabe

    Physical Chemistry Chemical Physics   22   19502 - 19511   2020年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Royal Society of Chemistry   参加形態:共同(副担当)  

    DOI: 10.1039/d0cp03520c

  • Thermoelastic properties of K0.7Na0.3AlSi3O8 hollandite and NaAlSi2O6 jadeite: Implication for the fate of the subducted continental crust in the deep mantle 査読

    Gréaux S., Zhou Y., Kono Y., Yamada A., Higo Y., Irifune T.

    Minerals   10 ( 3 )   2020年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Minerals  

    © 2020 by the authors. Licensee MDPI, Basel, Switzerland. The thermoelastic properties of K0.7Na0.3AlSi3O8 hollandite and NaAlSi2O6 jadeite, synthesized from a (K, Na)-felspar (microcline), were investigated by a combination of in situ energy dispersive synchrotron X-ray radiation and multi-anvil techniques at high pressure (P) and temperature (T) up to 21 GPa and 1700 K. The second-order phase transformation was found to occur in hollandite at ~16 GPa from tetragonal I/4m (hollandite-I) to monoclinic I2/m (hollandite-II), which confirms the previous report that the incorporation of Na in the hollandite structure decreases the transformation pressure. Fitting the pressure–volume–temperature data to the Birch–Murnaghan equation of state yielded estimates of the thermoelastic parameters for jadeite as well as the K0.7Na0.3AlSi3O8 hollandite-I and-II phases, which indicate that the incorporation of Na is likely to decrease the bulk moduli of both hollandite phases. The obtained thermoelastic parameters were combined with those of other mantle minerals reported previously to estimate the density of continental materials along an average mantle geotherm. Based on our results, continental crust and sediment become, respectively, 11% and 15% denser than the pyrolitic mantle at pressure >10 GPa, suggesting that once pulled down to the critical depth of ~300 km, the continental portions of the slab can subduct further into the deep mantle, down to the lowermost part of the mantle transition region.

    DOI: 10.3390/min10030261

    Scopus

    その他リンク: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85082417631&origin=inward

  • In-situ Raman measurements of Silicate glasses dring Vickers Indentation 査読 国際誌

    S. Yoshida, T.H. Nguyen, A. Yamada, J. Matsuoka

    Materials Transactions   2019年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(副担当)  

    DOI: doi.org/10.2320/matertrans.MD201901

  • Micro-Photoelastic Evaluation of Indentation-Induced Stress in Glass 査読 国際誌

    K. Asai, S. Yoshida, A. Yamada, J. Matsuoka, A. Errapart, Charles R. Kurkjian

    Materials Transactions   2019年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(副担当)  

    DOI: doi.org/10.2320/matertrans.MD201903

  • Sound velocity of CaSiO3 perovskite suggests the presence of basaltic crust in the Earth’s lower mantle 査読 国際誌

    Steeve Gréaux, Tetsuo Irifune, Yuji Higo, Yoshinori Tange, Takeshi Arimoto, Zhaodong Liu, Akihiro Yamada

    Nature   565   218 - 221   2019年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Nature   参加形態:共同(副担当)  

    DOI: 10.1038/s41586-018-0816-5

  • Density variations of Cr-rich garnets in the upper mantle inferred from the elasticity of uvarovite garnet 査読 国際誌

    Steeve Greaux, Akihiro Yamada

    Comptes Rendus Geoscience   351   95 - 103   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier  

    The thermoelastic parameters of Ca3Cr2Si3O12 uvarovite garnet were examined in situ at high pressure up to 13 GPa and high temperature up to 1100 K by synchrotron radiation energy-dispersive X-ray diffraction within a 6-6-type multi-anvil press apparatus.

    DOI: 10.1016/j.crte.2018.09.012

  • In-situ observation of the structural change in MgO-B2O3-SiO2 glass at high pressure and the permanent structural change 査読

    Yamada A., Harada M., Masuno A., Yamanaka K., Higo Y., Yoshida S., Ohta T., Matsuoka J.

    Journal of Non-Crystalline Solids   499   25 - 31   2018年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Non-Crystalline Solids  

    © 2018 Elsevier B.V. A 41.6MgO-27.1B2O3-31.2SiO2 glass was synthesized by container-less levitation method. B K-edge X-ray absorption near edge structure (XANES) spectroscopy was used to quantify the coordination of boron in the as-made glass, resulting in ~72% of boron in 3-fold coordination. Raman spectroscopy indicated that the glass structure includes depolymerized borate units, which are pyroborate (B2O54−) and ring and/or chain-type metaborate (B3O63−, (BO2O−)∞) groups. The structural changes in the glass under hydrostatic condition were investigated by high-pressure Raman spectroscopy within a diamond anvil cell at pressures up to 8.5 GPa. On the borate structure, metaborate groups decreased with pressure. In contrast, triborate groups, which include tetrahedrally coordinated boron and have a fully polymerized borate network, increased; suggesting that the coordination transformation of B and polymerization were induced via compression. However, the modification of the borate structure units seems to be reversible at least up to 8.5 GPa. As for the silicate network, Q0 and Q1 structures were responsible to compression. Specifically, Q0 could be replaced by Q1 with elevating pressure, which means that the silicate network becomes polymerized with pressure. Whereas, structure of glass samples recovered from the pressure higher than 5 GPa displayed depolymerized silicate network, as dissociation of Q2 to Q1. The observed structural changes in the silicate network implied a partial change of the coordination number of Si4+ ions, which can be enhanced by the presence of a modifier cation with high field strength such as Mg2+.

    DOI: 10.1016/j.jnoncrysol.2018.07.002

    Scopus

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  • Design and performance of high-pressure PLANET beamline at pulsed neutron source at J-PARC 査読

    T. Hattori, A. Sano-Furukawa, H. Arima, K. Komatsu, A. Yamada, Y. Inamura, T. Nakatani, Y. Seto, T. Nagai, W. Utsumi, T. Iitaka, H. Kagi, Y. Katayama, T. Inoue, T. Otomo, K. Suzuya, T. Kamiyama, M. Arai, T. Yagi

    Nuclear Instruments and Methods in Physics Research A   ( 780 )   55 - 67   2015年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER   参加形態:共同(副担当)  

    DOI: 10.1016/j.nima.2015.01.059

  • Six-axis multi-anvil press for high-pressure, high-temperature neutron diffraction experiments 査読

    • Sano-Furukawa, T. Hattori, H. Arima, A. Yamada, S. Tanabe, M. Kondo, A. Nakoamura, H. Kagi and T. Yagi

    Review of Scientific Instruments   85   113905 - 113905   2014年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AIP Publishing   参加形態:共同(副担当)  

    DOI: 10.1063/1.4901095

  • P–V–T equation of state of Mn3Al2Si3O12 spessartine garnet 査読

    S. Gréaux and A. Yamada

    Physics and Chemistry of Minerals   41 ( 2 )   141 - 149   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Splinger   参加形態:共同(副担当)  

    DOI: 10.1007/s00269-013-0632-2

  • Equation of state and phase transition of antigorite under high pressure and high temperature 査読

    C. Yang, T. Inoue, A. Yamada, T. Kikegawa, J. Ando

    Physics of Earth and Planetary Interiors   228   56 - 62   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(副担当)  

  • Pressure-induced structural change of hydrous enstatite and forsterite melt 査読

    A. Yamada, T. Inoue, S. Urakawa, K. Funakoshi, N. Funamori, T. Kikegawa and T. Irifune

    Earth and Planetary Science Letters   308   115 - 123   2011年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER   参加形態:共同(主担当)  

  • Combined ultrasonic elastic wave velocity and microtomography measurements at high pressures 査読

    Y. Kono, A. Yamada, Y. Wang, T. Yu, and T. Inoue

    Review of Scientific Instruments   82   023906   2011年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Institute of Physics   参加形態:共同(副担当)  

  • High-pressure x-ray diffraction studies on the structure of liquid silicate using a Paris–Edinburgh type large volume press 査読

    A. Yamada, Y. Wang, T. Inoue, W. Yang, C. Park, T. Yu and G. Shen

    Review of Scientific Instruments   82   015103   2011年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Institute of Physics   参加形態:共同(主担当)  

  • Densification of MgSiO3 glass with pressure and temperature 査読

    A. Yamada, S. J. Gaudio, C. E. Lesher

    Journal of Physics: Conference Series   215   012085   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IOP publishing   参加形態:共同(主担当)  

  • The effect of water on the high-pressure phase boundaries in the system Mg2SiO4-Fe2SiO4 査読

    T. Inoue, T. Ueda, Y. Tanimoto, A. Yamada and T. Irifune

    Journal of Physics: Conference Series   215   012101   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IOP publishing   参加形態:共同(副担当)  

  • Time-resolved X-ray diffraction analysis of the experimental dehydration of serpentine at high pressure 査読

    Inoue, T., I. Yoshimi, A. Yamada and T. Kikegawa

    Journal of Mineralogical and Petrogical Sciences   104   105 - 109   2009年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Japan Mineralogical Society Journal of Mineralogical and Petrological Sciences   参加形態:共同(副担当)  

  • Polyamorphism in Tin Tetraiodide 査読

    Fuchizaki, K., T. Hase, A. Yamada, Y. Katayama and K. Funakoshi

    Journal of Chemical Physics   130   121101   2009年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Institute of Physics   参加形態:共同(副担当)  

  • Exploratory study of the new B-doped diamond heater at high pressure and temperature and its application to in situ XRD experiments on hydrous Mg-silicate melt 査読

    A. Yamada, T. Irifune, H. Sumiya, Y. Higo, T. Inoue, and K. Funakoshi

    High Pressure Research   28   255 - 264   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Taylor & Francis   参加形態:共同(主担当)  

  • Elastic wave velocities and Raman shift of MORB glass at high pressure 査読

    Kono, Y., H. Ohfuji, Y. Higo, A. Yamada, T. Inoue, T. Irifune and K. Funakoshi

    Journal of Mineralogical and Petrogical Sciences   103   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Japan Mineralogical Society Journal of Mineralogical and Petrological Sciences   参加形態:共同(副担当)  

    DOI: 10.2465/jmps.071022c.

  • In situ strength measurements on natural upper mantle 査読

    Yamamoto, J., J. Ando, H. Kagi, T. Inoue, A. Yamada, D. Yamazaki and T. Irifune

    Physics and Chemistry of Minerals   35   249 - 257   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Splinger   参加形態:共同(副担当)  

  • In-situ X-ray experiment on the structure of hydrous Mg-silicate melt under high pressure and high temperature 査読

    A. Yamada, T. Inoue, S. Urakawa, K. Funakoshi, N. Funamori, T. Kikegawa, H. Ohfuji and T. Irifune

    Geophysical Research Letters   34   L10303   2007年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Geophysical Union   参加形態:共同(主担当)  

    DOI: 10.1029/2006GL028823

  • The Phase boundary between CaSiO3 perovskite and Ca2SiO4 + CaSi2O5 determined by in situ X-ray observations 査読

    Sueda, Y., T. Irifune, A. Yamada, T. Inoue, X. Liu and K. Funakoshi

    Geophysical Research Letters   33   L10307   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(主担当)  

  • In situ high-pressure and high-temperature studies on the stability and equation of state of superhydrous phase B 招待 査読

    Inoue, T., T. Ueda, Y. Higo, A. Yamada, T. Irifune and K. Funakoshi

    Earth's deep water cycle, Geophysical monograph series 168   147 - 157   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Geophysical Union   参加形態:共同(主担当)  

  • Melting of enstatite from 13 to 18 GPa under hydrous condition 査読

    A. Yamada, T. Inoue and T. Irifune

    Physics of Earth and Planetary Interiors   147   45 - 56   2004年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER   参加形態:共同(主担当)  

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