Electroless Deposition of LaMnO3 Perovskite Film on Yttria Stabilized Zirconia Substrate
| Autor: | Takeshi Sasaki, Yasumichi Matsumoto, Masanori Nagata, Jukichi Hombo |
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| Rok vydání: | 1993 |
| Předmět: |
Materials science
Inorganic chemistry Oxide Substrate (electronics) Condensed Matter Physics Electronic Optical and Magnetic Materials Inorganic Chemistry chemistry.chemical_compound chemistry Oxidizing agent Materials Chemistry Ceramics and Composites Atomic ratio Physical and Theoretical Chemistry Thin film Cyclic voltammetry Yttria-stabilized zirconia Perovskite (structure) |
| Zdroj: | Journal of Solid State Chemistry. 105:255-262 |
| ISSN: | 0022-4596 |
| DOI: | 10.1006/jssc.1993.1213 |
| Popis: | Electroless deposition of LaMnO 3 precursors on YSZ substrate from a solution containing Mn 2+ , La 3+ , and an oxidizing agent was investigated. Peroxydisulfate was used as the oxidizing agent. Pretreatment of the substrate, sensitization in a solution of SnCl 2 , and activation in a solution of PdCl 2 were necessary for deposition of the oxide film. The La/Mn atomic ratio in the oxide film increased with increases in the [La 3+ ]/[Mn 2+ ] ratio and in the pH of the solution. The additives CH 3 COONa and AgNO 3 in the solution improved the incorporation of La 3+ ion into the oxide film during the electroless deposition and the adhesion of the as-deposited oxide film on YSZ. It was judged from the cyclic voltammetry of the as-deposited oxide film and from XPS, IR and XRD measurements that the as-deposited oxide film on YSZ was amorphous hydrous MnO 2 which contained La 3+ ions by specific adsorption. La 3+ ions existed in a state similar to that in La 2 O 3 , according to an XPS measurement. La 1- x MnO 3 perovskite film ( x ≈ 0.85, 0.96) was prepared by heat treatment of the deposited oxide film at 800°C for 5 hr. The mechanism of the electroless deposition of the LaMnO 3 precursor is discussed. |
| Databáze: | OpenAIRE |
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