Synthesis of the Perovskite-Type BaCe0.8Pr0.05Cu0.15O3-δ via EDTA-Citrate
Autor: | Francisco Klebson Gomes dos Santos, Carlson Pereira de Souza, Daniel A. Macedo, Ernani Dias da Silva Filho, Maxwell Ferreira Lobato, A. B. Vital, Andarair Gomes dos Santos |
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Rok vydání: | 2017 |
Předmět: |
Materials science
Inorganic chemistry Oxide chemistry.chemical_element Context (language use) 02 engineering and technology Perovskite 010402 general chemistry 01 natural sciences Oxygen law.invention chemistry.chemical_compound law EDTA-Citrate method General Materials Science Calcination Materials of engineering and construction. Mechanics of materials Perovskite (structure) Mechanical Engineering 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences BaCe0.8Pr0.05Cu0.15O3-δ chemistry Mechanics of Materials copper TA401-492 Chemical stability Barium carbonate Crystallite 0210 nano-technology |
Zdroj: | Materials Research, Vol 20, Iss suppl 2, Pp 447-451 (2017) Materials Research, Issue: ahead, Published: 06 NOV 2017 Materials Research v.20 suppl.2 2017 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
ISSN: | 1980-5373 1516-1439 |
Popis: | BaCeO3-based ceramics are ionic and electronic conductors that can be applied to oxygen sensors, solid oxide fuel cells and oxygen permeable membranes. However, the low chemical stability at high temperatures of these materials motivates studies involving doping of A and/or B sites of the perovskite structure. In this context, the present work aimed to synthesize a new BaCe0.8Pr0.05Cu0.15O3-δ material using the chemical route of complexation which combines EDTA-Citrate with pH variation. The powders obtained at pH 3 or 11 and calcined up to 900 ºC are thermally unstable. The cubic perovskite BaCe0.8Pr0.05Cu0.15O3-δ with crystallite size between 99.4 nm and 131.6 nm was obtained along with barium carbonate traces. In the powders calcined at 1000 ºC the pH increase decreases the amount of barium carbonate (17.3% to pH 3, 3.4% to pH 7 and 1.8% to pH 11), but increases the size of grains with irregular shapes. |
Databáze: | OpenAIRE |
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