Szczegóły publikacji
Opis bibliograficzny
Some observations on the synthesis and electrolytic properties of ${(Ba_{1-x}Ca_{x})(M_{0.9}Y_{0.1})O_{3}}$,M=Ce, Zr-based samples modified with calcium / Magdalena DUDEK, Bartłomiej LIS, Alicja RAPACZ-KMITA, Marcin GAJEK, Andrzej RAŹNIAK, Ewa DROŻDŻ // Materials Science Poland ; ISSN 2083-1331. — Tytuł poprz.: Materials Science (Poland) ; ISSN: 0137-1339. — 2016 — vol. 34 no. 1, s. 101–114. — Bibliogr. s. 113–114
Autorzy (6)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 97406 |
|---|---|
| Data dodania do BaDAP | 2016-05-05 |
| Tekst źródłowy | URL |
| DOI | 10.1515/msp-2016-0022 |
| Rok publikacji | 2016 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Materials Science Poland |
Abstract
In this paper, the impact of partial substitution of calcium for barium in (Ba1−xCax)(M0.9Y0.1)O3, M = Ce, Zr on physicochemical properties of the powders and sintered samples was investigated. The powders, with various contents of calcium (x = 0, 0.02, 0.05, 0.1), were prepared by means of thermal decomposition of organometallic precursors containing EDTA. All of the BaCeO3-based powders synthesised at 1100 °C were monophasic with a rhombohedral structure, however, completely cubic BaZrO3-based solid solutions were obtained at 1200 °C. A study of the sinterability of BaZr0.9Y0.1O3 and BaCe0.9Y0.1O3-based pellets was performed under non-isothermal conditions within a temperature range of 25 to 1200 °C. The partial substitution of barium for calcium in the (Ba1−xCax)(M0.9Y0.1)O3, M = Ce, Zr solid solution improved the sinterability of the samples in comparison to the initial BaCe0.9Y0.1O3 or BaZr0.9Y0.1O3. The relative density of calcium-modified BaCe0.9Y0.1O3-based samples reached approximately 95 to 97 % after sintering at 1500 °C for 2 h in air. The same level of relative density was achieved after sintering calcium-modified BaZr0.9Y0.1O3 at 1600 °C for 2 h. Analysis of the electrical conductivity from both series of investigated materials showed that the highest ionic conductivity, in air and wet 5 % H2 in Ar, was attained for the compositions of x = 0.02 to 0.05 (Ba1−xCax)(M0.9Y0.1)O3, M = Zr, Ce. The oxygen reduction reaction on the interface Pt|BaM0.9Y0.1O3, M = Ce, Zr was investigated using Pt microelectrodes. Selected samples of (Ba1−xCax)(M0.9Y0.1)O3, M = Zr, Ce were tested as ceramic electrolytes in hydrogen-oxygen solid oxide fuel cells operating at temperatures of 700 to 850 °C.
