open access publication

Article, 2023

Effect of sintering temperatures on temperature coefficient of capacitance of KCa2Nb3O10 bulk-layered perovskite

In: Journal of Asian Ceramic Societies, ISSN 2187-0764, Volume 11, 3, Pages 395-405, 10.1080/21870764.2023.2228090

Contributors (8)

Kim, Jeong-Yeon [1] [2] Hong, Gyo-Hee [1] [3] Kim, Yun [1] [4] Hwang, Seong-Mee [2] Shin, Weon Ho (0000-0003-0487-5480) [5] Seo, Won-Seon [6] Kim, Sang-Il (0000-0003-0093-720X) (Corresponding author) [2] Kim, Hyun-Sik (0000-0001-8934-4042) (Corresponding author) [2]


  1. [1] Jeong-Yeon Kim, Gyo-Hee Hong, and Se Yun Kim contributed equally to this work.
  2. [2] University of Seoul
  3. [NORA names: South Korea; Asia, East; OECD]
  4. [3] Hongik University
  5. [NORA names: South Korea; Asia, East; OECD]
  6. [4] Samsung (South Korea)
  7. [NORA names: South Korea; Asia, East; OECD]
  8. [5] Kwangwoon University
  9. [NORA names: South Korea; Asia, East; OECD]


Multilayer ceramic capacitors (MLCCs) for electric vehicles require their room temperature capacitance to change ≤ ±15% at −55°C to 200°C. The dielectric constant (ε) of BaTiO3, a dielectric material widely used in MLCCs, drops at >125°C making its application to electric vehicles difficult. Here, we propose KCa2Nb3O10 (KCNO)-layered perovskite as a strong candidate for electric vehicle MLCCs as its ε does not change abruptly with temperature. The effect of sintering temperature on the temperature coefficient of capacitance (TCC) of KCNO is studied. The KCNO powder calcined at 900–1200°C is sintered at 1200°C–1300°C. Microstructure and temperature-dependent ε are determined by the sintering temperature, while the sintered density is related to the difference between the calcining and sintering temperatures. Only the room temperature ε of the samples sintered at 1300°C (except the one calcined at 900°C) varies ≤ ±15% at 25°C–200°C (ε ~250 at room temperature). The sample calcined at 1100°C and sintered at 1300°C has highly elongated grains and the highest activation energy. These factors are responsible for the TCC of the 1300°C sintered KCNO being ≤ ±15% at 25–200°C.


BaTiO3, KCNO, KCa2Nb3O10, TCC, activation energy, applications, candidates, capacitance, capacitors, ceramic capacitors, coefficient, constants, density, dielectric constants, dielectric materials, differences, effect, electric vehicles, energy, factors, grains, high activation energy, layered perovskite, materials, microstructure, multilayer ceramic capacitors, perovskites, powder, room temperature capacitance, samples, sintered density, sintering temperature, strong candidate, temperature, temperature coefficient, temperature ε, vehicles


  • Ministry of Education
  • Ministry of Trade, Industry and Energy
  • National Research Foundation of Korea
  • Ministry of Science and ICT