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眞岩 宏司 教授


[研究指導課程]
博士前期・後期課程

[取得学位]
博士(工学、早稲田大学)

専門・研究分野

電子材料工学、応用物理学

研究テーマ

  • 電気熱量効果、弾性熱量効果を用いた新規冷却素子の開発
  • 焦電効果を利用した熱エネルギーハーベスト
  • 圧電効果を利用した振動エネルギーハーベスト
  • 強誘電体薄膜のMEMS応用
  • 圧電単結晶の高性能化と超音波デバイスへの応用

研究キーワード

エナジーハーベスト、電気熱量効果、冷却素子

SDGsとの関連


主な研究業績

  1. Y. J. Yamashita,, H, Sun, Y. Xiang, H. Maiwa, H.-Y. Lee, H.-P. Kim, X. Jiang,Enhanced electrical properties by AC poling of relaxor-Pb(Zr,Ti)O3 single crystals manufactured by the solid state crystal growth method Japanese Journal of Applied Physics, 62, art. no. SM1009. (2023). 
  2. Y. Xiang, Y. Sun, Y. Yamashita, T. Karaki, H. Maiwa, Macro- and microstructure of lead perovskite ternary piezoelectric single crystals after direct current and alternating current poling Journal of the Ceramic Society of Japan, 131 (7), pp. 263-269. (2023)
  3. H. Maiwa, A. Sakurai, K. Zhao, Y. Liu, Effects of MnO addition on structure and electrical properties of lead-free antiferroelectric 0.96NaNbO3–0.04CaZrO3 ceramics Ferroelectrics, 602 (1), pp. 33-45. (2023)
  4. H. Maiwa. Direct measurement of temperature change due to elastocaloric effect in poled piezoelectric ceramics attached to metal Japanese Journal of Applied Physics, 60, art. no. SFFC06, (2021).
  5. H. Maiwa, Electrocaloric and electromechanical properties of (Pb,La)(Zr,Ti)O3 ceramics Ferroelectrics, 556 (1), pp. 51-61. (2020).
  6. H. Maiwa, Temperature dependence of electromechanical and electrocaloric properties of PLZT ceramics. Ferroelectrics, 539 (1) pp. 71-78 (2019).
  7. H. Maiwa, Energy harvesting using pyroelectric materials by thermal
    energy in Nanoscale Ferroelectric-Multiferroic Materials for Energy Harvesting Applications, Editors: Hideo Kimura Zhenxiang Cheng Tingting Jia, Paperback ISBN: 9780128144992, Imprint: Elsevier Published Date: March 6th 2019
  8. 眞岩宏司、圧電セラミックスの標準化、セラミックス、54(6)pp. 409-412. (2019).
  9. H. Maiwa, “Electrocaloric Properties of Potassium Tantalate Niobate Crystals.” Japanese Journal of Applied Physics, 56(10), art. no. 10PC05 (2017).
  10. H. Maiwa, Electrocaloric Properties of Potassium Tantalate Niobate Crystals. Japanese Journal of Applied Physics,55(10), art. no. 10TB09 (2016).
  11. H. Maiwa, Dielectric and Electromechanical Properties of (K,Na)NbO3 Ceramics Prepared by Hot Isostatic Pressing, Ferroelectrrics, 491 (1), 71-78. (2016).
  12. H. Maiwa, Characterization of Electrocaloric Properties by Indirect Estimation and Direct Measurement of Temperature–Electric Field Hysteresis Loops. Japanese Journal of Applied Physics, 54(10), art. no. 10NB08 (2015).
  13. H. Maiwa, T. Jia, and H. Kimura, Energy Harvesting using PLZT and Lead-free Ceramics and their Piezoelectric Properties on the Nano-scale. Ferroelectrics, 475(1), pp. 71-81. (2015)
  14. 眞岩宏司、「電気熱量効果の固体冷却素子への応用」超音波テクノ, 27(4), pp.33-39. (2015)
  15. I. Coondoo, N. Panwar, H. Maiwa, A. Kholkin, Improved piezoelectric and energy harvesting characteristics in lead-free Fe2O3 modified KNN ceramics. J. Electroceramics, 34(1), pp.255-261.(2015)
  16. H. Maiwa, Dielectric and electromechanical properties of BaTiO3 ceramics prepared by hot isostatic pressing. Ferroelectrics, 463(1), pp. 15-24. (2014)
  17. H. Maiwa, Pyroelectric and electrocaloric properties of PZT- and BT-based ceramics, Ferroelectrics, 450 (1), pp. 84-92. (2013)
  18. H. Maiwa, and W. Sakamoto, Vibrational energy harvesting using a unimorph with PZT- or BT-based ceramics, Ferroelectrics, 446 (1), pp. 67-77. (2013)
  19. H. Ichikawa, W. Sakamoto, Y. Akiyama, H. Maiwa, M. Moriya, T. Yogo, Fabrication and characterization of (100),(001)-oriented reduction-resistant lead-free piezoelectric (Ba,Ca)TiO3 ceramics using platelike seed crystals, Japanese Journal of Applied Physics, 52 (9), art. no. 09KD08. (2013)
  20. H. Maiwa, Piezoelectric properties of BaTiO3 ceramics prepared by hot isostatic pressing, Journal of the Ceramic Society of Japan, 121 (1416), pp. 655-658. (2013)
  21. H. Nagayoshi, H. Maiwa, and T. Kajikawa, Power conditioner with variable switching control for thermoelectric generator systems, Journal of Electronic Materials, 42 (7), pp. 2282-2286. (2013)
  22. H. Maiwa, S-H. Kim, Electrocaloric and pyroelectric properties of PZT and PMN-PNN-PZT thin films, Ceramics International, 39, pp. S497-S500. (2013)
  23. H. Maiwa, Electromechanical properties of Ba(Zr0.2Ti0.8)O3 ceramics prepared by spark plasma sintering, Ceramic International, Vol. 38S, pp. S219-S223. (2012)
  24. H. Maiwa, Y. Ishizone, W. Sakamoto, Thermal and vibrational energy harvesting using PZT- and BT-based ceramics, Proceedings of ISAF/ECAPD/PFM 2012, art. no. 6297808. (2012)
  25. H. Maiwa, Piezoelectric properties of BaTiO3 ceramics prepared by spark plasma sintering, Journal of the Australian Ceramic Society, 48, pp. 59-63. (2012)
  26. W. Sakamoto, Y. Hamazaki, H. Maiwa, H. Morioka, K. Saito, M. Moriya and T. Yogo, Growth and properties of highly oriented lead-free Mn-doped NaNbO3-BaTiO3 piezoelectric thin films prepared by chemical solution deposition, Journal of Crystal Growth, Vol. 318, pp. 879-883. (2011)
  27. H. Nagayoshi, T. Nakabayashi, H. Maiwa, and T. Kajikawa, Development of 100-W high-efficiency MPPT power conditioner and evaluation of TEG system with battery load, Journal of Electronic Materials, Vol. 40, pp. 657-661. (2011)
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