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- Title
钛酸钡-铌酸钾钠弛豫铁电储能陶瓷的 合成和表征.
- Authors
靳权; 宋恩鹏; 蔡克
- Abstract
The low comprehensive energy storage performance, such as the charging energy density, discharging energy density, and energy storage efficiency, is a key scientific problem to be solved urgently in the energy storage ceramics field. Both improving the polarization difference (∆P) and breakdown field strength (BDS) of the ceramics are the key to enhance their comprehensive energy storage performance. With the main crystal phase BaTiO3 (BT), utilizing the K0.5Na0.5NbO3 (KNN) as the coating agent, sintering aid and additives, the BT-KNN ceramics with the grain sizes of 100 nm and 200 nm was synthesized, respectively. The BT-KNN ceramics has obvious nanodomains, relaxation behaviors and dielectric temperature stability, and with a high ∆P and high BDS. Compared with the BTKNN ceramics with the grain size of 100 nm, the BT-KNN ceramics with the grain size of 200 nm has a better comprehensive energy storage properties, including high charging energy density W (2.50 J·cm−3), recoverable energy density Wrec (2.08 J·cm−3) and energy storage efficiency η (83.2%). This research may provide a theoretical basis for preparing high comprehensive energy storage performance ceramics.
- Subjects
ENERGY storage; DIELECTRIC relaxation; ENERGY density; GRAIN size; ENERGY consumption; CERAMICS; ELECTRIC charge
- Publication
Acta Materiae Compositae Sinica, 2023, Vol 40, Issue 4, p2140
- ISSN
1000-3851
- Publication type
Article
- DOI
10.13801/j.cnki.fhclxb.20220509.002