[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)
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
- 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).
- 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)
- 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)
- 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).
- H. Maiwa, Electrocaloric and electromechanical properties of (Pb,La)(Zr,Ti)O3 ceramics Ferroelectrics, 556 (1), pp. 51-61. (2020).
- H. Maiwa, Temperature dependence of electromechanical and electrocaloric properties of PLZT ceramics. Ferroelectrics, 539 (1) pp. 71-78 (2019).
- 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 - 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).
- H. Maiwa, “Electrocaloric Properties of Potassium Tantalate Niobate Crystals.” Japanese Journal of Applied Physics, 56(10), art. no. 10PC05 (2017).
- H. Maiwa, Electrocaloric Properties of Potassium Tantalate Niobate Crystals. Japanese Journal of Applied Physics,55(10), art. no. 10TB09 (2016).
- H. Maiwa, Dielectric and Electromechanical Properties of (K,Na)NbO3 Ceramics Prepared by Hot Isostatic Pressing, Ferroelectrrics, 491 (1), 71-78. (2016).
- 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).
- 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)
- 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)
- 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)
- H. Maiwa, Dielectric and electromechanical properties of BaTiO3 ceramics prepared by hot isostatic pressing. Ferroelectrics, 463(1), pp. 15-24. (2014)
- H. Maiwa, Pyroelectric and electrocaloric properties of PZT- and BT-based ceramics, Ferroelectrics, 450 (1), pp. 84-92. (2013)
- H. Maiwa, and W. Sakamoto, Vibrational energy harvesting using a unimorph with PZT- or BT-based ceramics, Ferroelectrics, 446 (1), pp. 67-77. (2013)
- 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)
- 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)
- 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)
- H. Maiwa, S-H. Kim, Electrocaloric and pyroelectric properties of PZT and PMN-PNN-PZT thin films, Ceramics International, 39, pp. S497-S500. (2013)
- H. Maiwa, Electromechanical properties of Ba(Zr0.2Ti0.8)O3 ceramics prepared by spark plasma sintering, Ceramic International, Vol. 38S, pp. S219-S223. (2012)
- 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)
- H. Maiwa, Piezoelectric properties of BaTiO3 ceramics prepared by spark plasma sintering, Journal of the Australian Ceramic Society, 48, pp. 59-63. (2012)
- 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)
- 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)