Temperature‐stable dielectric and energy storage properties of La(Ti0.5Mg0.5)O3‐doped (Bi0.5Na0.5)TiO3‐(Sr0.7Bi0.2)TiO3 lead‐free ceramics. Issue 12 (20th June 2018)

• Record Type: Journal Article
• Authors: Zhao, Nianshun; Fan, Huiqing; Ning, Li; Ma, Jiangwei; Zhou, Yunyan
• Is Part Of: Journal of the American Ceramic Society. Volume 101:Issue 12(2018)
• Page Start: 5578
• Page End: 5585
• Publication Date: 2018-06-20
• Subjects: dielectric relaxation -- energy storage -- lead‐free piezoceramics -- phase transition -- temperature stable; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.15870
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: A new type of (0.7− x )Bi0.5 Na0.5 TiO3 ‐0.3Sr0.7 Bi0.2 TiO3 ‐ x LaTi0.5 Mg0.5 O3 (LTM1000 x, x = 0.0, 0.005, 0.01, 0.03, 0.05 wt%) lead‐free energy storage ceramic material was prepared by a combining ternary perovskite compounds, and the phase transition, dielectric, and energy storage characteristics were analyzed. It was found that the ceramic materials can achieve a stable dielectric property with a large dielectric constant in a wide temperature range with proper doping. The dielectric constant was stable at 2170 ± 15% in the temperature range of 35‐363°C at LTM05. In addition, the storage energy density was greatly improved to 1.32 J/cm 3 with a high‐energy storage efficiency of 75% at the composition. More importantly, the energy storage density exhibited good temperature stability in the measurement range, which was maintained within 5% in the temperature range of 30‐110°C. Particularly, LTM05 show excellent fatigue resistance within 10 6 fatigue cycles. The results show that the ceramic material is a promising material for temperature‐stable energy storage.