Impedance spectroscopy of acceptor-doped CaZrO3 with cation nonstoichiometry
SCIE
SCOPUS
- Title
- Impedance spectroscopy of acceptor-doped CaZrO3 with cation nonstoichiometry
- Authors
- Hwang, SC; Choi, GM
- Date Issued
- 2006-12
- Publisher
- SPRINGER
- Abstract
- The electrical conductivities of acceptor-doped Ca1-x Zr0.99M0.01O3-delta (M = Mg2+, In3+) systems have been investigated as a function of cation nonstoichiometry (0 <= x <= 0.05). The electrical characterization was carried out using impedance spectroscopy at different temperatures in dry air. The contributions of grain (R-g) and grain boundary resistance (R-gb) to the total resistance (R-t) were examined with the impedance and/or modulus plane representation. For the stoichiometric composition, the R-t of the specimen decreased with acceptor doping. When Ca deficiency was small, both the R-g and the R (gb) slightly increased with nonstoichiometry (x). However, when Ca deficiency was large and excess zirconia was found as a second phase, the R-gb and the contribution of the R-gb to the R-t significantly increased with x.
- Keywords
- CaZrO3; nonstoichiometry; electrical conductivity; impedance; grain boundary; CALCIUM ZIRCONATE; PROTONIC CONDUCTION; SOLID-ELECTROLYTE; SINTERED OXIDES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23603
- DOI
- 10.1007/s10832-006-4928-1
- ISSN
- 1385-3449
- Article Type
- Article
- Citation
- JOURNAL OF ELECTROCERAMICS, vol. 17, no. 39848, page. 1091 - 1095, 2006-12
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