Details

Autor(en) / Beteiligte

• Luo, Nengneng
• Han, Kai
• Liu, Laijun
• Peng, Biaolin
• Wang, Xinpeng
• Hu, Changzheng
• Zhou, Huanfu
• Feng, Qin
• Chen, Xiyong
• Wei, Yuezhou

Titel

Lead‐free Ag1−3xLaxNbO3 antiferroelectric ceramics with high‐energy storage density and efficiency

Ist Teil von

• Journal of the American Ceramic Society, 2019-08, Vol.102 (8), p.4640-4647

Ort / Verlag

Columbus: Wiley Subscription Services, Inc

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Environmentally benign lead‐free bulk ceramics with high recoverable energy density (Wrec) are very attractive in advanced pulsed power capacitors. In this work, composition engineering was adopted by La3+ modification to improve the energy storage performance of Ag1−3xLaxNbO3 ceramics. It was found that the antiferroelectric (AFE) phase was stabilized after La3+ substitution, as a result of the reduced tolerance factor t. Significant improvement of Wrec and energy storage efficiency (η) were achieved with value of 3.12 J/cm3 and 0.63 for x = 0.02 at an electric field of 230 kV/cm, more than 1.5 times the value of pure AgNbO3 (Wrec = 1.9 J/cm3, η = 0.40). The excellent energy storage properties are resulted from the increased antiferroelectric‐ferroelectric phase transition electric field (EF), ferroelectric‐antiferroelectric phase transition electric field (EA), and breakdown electric field (Eb). The enhanced Eb was ascribed to the decreased grain size and increased electrical resistivity upon La3+ modification. The feature makes Ag1−3xLaxNbO3 a potential candidate for energy storage applications.