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ホーム > 教員情報 > 人間環境学科 > 眞岩 宏司 教授

眞岩 宏司 教授


[研究テーマ]
エナジーハーベストと電気熱量効果を用いた新規固体冷却素子の開発

[主な担当科目]
自然と環境の科学技術、元素の分析手法、生活の無機素材化学

エナジーハーベストと電気熱量効果を用いた新規固体冷却素子の開発

焦電効果、圧電効果、熱電変換などを利用して環境のエネルギーから電気エネルギーを得るエナジーハーベストの研究を行なっています。また、強誘電体化合物の電気熱量効果を用いた新規固体冷却素子の開発にも取り組んでいます。

取得学位

博士(工学、早稲田大学)

主な研究業績

  1. H. Maiwa, Electrocaloric Properties of Potassium Tantalate Niobate Crystals. Japanese Journal of Applied Physics,55(10), art. no. 10TB09 (2016).
  2. H. Maiwa, Dielectric and Electromechanical Properties of (K,Na)NbO3 Ceramics Prepared by Hot Isostatic Pressing, Ferroelectrrics, 491 (1), 71-78. (2016).
  3. 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).
  4. 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)
  5. 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)
  6. 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)
  7. H. Maiwa, Dielectric and electromechanical properties of BaTiO3 ceramics prepared by hot isostatic pressing. Ferroelectrics, 463(1), pp. 15-24. (2014)
  8. H. Maiwa, Pyroelectric and electrocaloric properties of PZT- and BT-based ceramics, Ferroelectrics, 450 (1), pp. 84-92. (2013)
  9. H. Maiwa, and W. Sakamoto, Vibrational energy harvesting using a unimorph with PZT- or BT-based ceramics, Ferroelectrics, 446 (1), pp. 67-77. (2013)
  10. 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)
  11. 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)
  12. 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)
  13. H. Maiwa, S-H. Kim, Electrocaloric and pyroelectric properties of PZT and PMN-PNN-PZT thin films, Ceramics International, 39, pp. S497-S500. (2013)
  14. H. Maiwa, Electromechanical properties of Ba(Zr0.2Ti0.8)O3 ceramics prepared by spark plasma sintering, Ceramic International, Vol. 38S, pp. S219-S223. (2012)
  15. 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)
  16. H. Maiwa, Piezoelectric properties of BaTiO3 ceramics prepared by spark plasma sintering, Journal of the Australian Ceramic Society, 48, pp. 59-63. (2012)
  17. 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)
  18. 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)
  19. W. Sakamoto, Y.-i. Hamazaki, H. Maiwa, M. Moriya, T. Yogo, Lead-free piezoelectric thin films of Mn-doped NaNbO3-BaTiO3 fabricated by chemical solution deposition, Thin Solid Films, 518, pp. 4256-4260. (2010)
  20. H. Maiwa, K. Ohashi, T. Hayashi, Temperature dependence of the electrical and electromechanical properties of Ba(Zr0.2Ti0.8)O3 thin films prepared by chemical solution deposition, Journal of the Ceramic Society of Japan, 118, pp. 735-737. (2010)
  21. S. Hayano, R. Shike, K. Shoji, H. Ochiai, O. Kimura and H. Maiwa, Low-temperature sintering of Pb(Ni1/3Nb2/3)O3-PbZrO3-PbTiO3 ceramics via single-step calcination process without sintering additives, Japanese Journal of Applied Physics 49, art. no. 09MC08. (2010) 
  22. H. Maiwa, T. Kogure, W. Sakamoto, T. Hayashi, Preparation and properties of Bi0.5Na0.5TiO3 thin films by chemical solution deposition, Ferroelectrics, 405, pp. 204–210, (2010)
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趣味

散歩、音楽鑑賞

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