Enhancing low-grade waste heat recovery by lead-free ferroelectric Ba (Zr0.1Ti0.9)O3 with Sr and Ca isovalent dopants

被引：2

作者：

Ngo, Nguyen Chi Trung ^{[1
]}

Sugiyama, Hironari ^{[1
]}

Sodige, Buddhika Amila Kumara ^{[1
]}

Wiff, Juan Paulo ^{[2
]}

Furuno, Hideto ^{[1
]}

Yamanaka, Satoru ^{[3
]}

Kim, Yoonho ^{[3
]}

Suzuki, Tsuneo ^{[1
]}

Baba, Masaaki ^{[4
]}

Takeda, Masatoshi ^{[4
]}

Yamada, Noboru ^{[4
]}

Niihara, Koichi ^{[1
]}

Nakayama, Tadachika ^{[1
]}

机构：

[1] Nagaoka Univ Technol, Extreme Energy Dens Res Inst, Nagaoka, Niigata 9402188, Japan

[2] Nagaoka Univ Technol, Dept Sci Technol Innovat, Nagaoka, Niigata 9402188, Japan

[3] Daihatsu Motor Co Ltd, Res Inst Car & Life Style, 1-2 Yoshimoto, Kurume, Fukuoka 8931206, Japan

[4] Nagaoka Univ Technol, Dept Mech Engn, Nagaoka, Niigata 9402188, Japan

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 10期

关键词：

Waste heat recovery; Lead-free ferroelectric ceramic; Electrothermodynamic cycle; ELECTRICAL ENERGY; CERAMICS; EFFICIENCY; CONVERSION; PERFORMANCE; TITANATE;

D O I：

10.1016/j.ceramint.2023.01.227

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Kim's novel electrothermodynamic cycle enables the Ba(Zr0.1Ti0.9)O3 ceramic to achieve a significantly high energy density at temperatures 20-120 degrees C by utilizing its mixed ferroelectric-relaxor behavior. This allows the material to replace lead-based compositions and provides a clean, environmentally friendly, sustainable power source from low-grade waste heat for technologies like the Internet of Things. However, this still does not represent the highest potential of this material. In this research, our group utilizes the smaller ionic radii of the isovalent dopants Sr and Ca to enhance the relaxor behavior, hence improving the pyroelectric conversion ability of Ba(Zr0.1Ti0.9)O3. Actual measurements using the Olsen and Kim cycles revealed enhancement by factors of 1.29 and 1.55 for each cycle due to the improvement in remanent and saturated polarization and temperature dependence of the pyroelectricity. The results suggested that lead-free Ba(Zr0.1Ti0.9)O3 has promising potential as a critical pyroelectric waste heat recovery-based element.

引用

页码：16290 / 16296

页数：7

共 27 条

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