Effect of sintering temperatures on temperature coefficient of capacitance of KCa<sub>2</sub>Nb<sub>3</sub>O<sub>10</sub> bulk-layered perovskite
نویسندگان
چکیده
Multilayer ceramic capacitors (MLCCs) for electric vehicles require their room temperature capacitance to change ≤ ±15% at −55°C 200°C. The dielectric constant (ε) of BaTiO3, a material widely used in MLCCs, drops >125°C making its application difficult. Here, we propose KCa2Nb3O10 (KCNO)-layered perovskite as strong candidate vehicle MLCCs ε does not abruptly with temperature. effect sintering on the coefficient (TCC) KCNO is studied. powder calcined 900–1200°C sintered 1200°C–1300°C. Microstructure and temperature-dependent are determined by temperature, while density related difference between calcining temperatures. Only samples 1300°C (except one 900°C) varies 25°C–200°C (ε ~250 temperature). sample 1100°C has highly elongated grains highest activation energy. These factors responsible TCC being 25–200°C.
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ژورنال
عنوان ژورنال: Journal of Asian Ceramic Societies
سال: 2023
ISSN: ['2187-0764']
DOI: https://doi.org/10.1080/21870764.2023.2228090