Abstract
The electrical properties of dense, high purity CaZrO3 discs, sintered at 1380°C with and without added ZrO2, were investigated up to 950°C. Dielectric constant, loss tangent, and electrical conductivity were measured from 25 to 725°C, and the real and imaginary impedances were measured between 800 and 950°C by impedance spectroscopy techniques. Dielectric constant increased by 8% above 300°C and loss tangent increased from.1% at 25°C to ∼2% above 300°C. Activation energy of electrical conductivity determined between 300°C and 950°C by alternative current (AC) and direct current (DC) measurements. These results indicate that CaZrO3 could be a useful dielectric material for capacitor applications up to 500°C. A reported decrease in conductivity due to addition of excess ZrO2 into stoichiometric CaZrO3 could not be confirmed.
Recommended Citation
A. Devoe et al., "High Temperature Dielectric Properties Of Calcium Zirconate," International Journal of Applied Ceramic Technology, Wiley, Jan 2023.
The definitive version is available at https://doi.org/10.1111/ijac.14432
Department(s)
Materials Science and Engineering
Publication Status
Full Access
Keywords and Phrases
calcium zirconate; CaZrO 3; dielectric; electrical properties; high temperature capacitors
International Standard Serial Number (ISSN)
1744-7402; 1546-542X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Wiley, All rights reserved.
Publication Date
01 Jan 2023
