Síntese e estudo microestrutural de perovsquitas tipo La0,8 Ca0,2MO3 (M: Co e Mn) para aplicação em catálise automotiva
Materials with perovskite structure are potential catalysts for preventing greenhouse gas emissions to the environment. Several methods have been proposed for the synthesis of these materials in order to produce homogeneous powders with nanometric particle size. In the present work, the La0.8 Ca0.2M...
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| Principais autores: | , , , , , |
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| Formato: | article |
| Idioma: | pt_BR |
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/30359 |
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| Resumo: | Materials with perovskite structure are potential catalysts for preventing greenhouse gas emissions to the environment. Several methods have been proposed for the synthesis of these materials in order to produce homogeneous powders with nanometric particle size. In the present work, the La0.8 Ca0.2MnO3 and La 0.8
Ca0.2CoO3 systems were prepared by the polymeric precursor method for application in automotive atalysis. This method was chosen because it allows obtaining homogeneous powders and crystalline phases at lower temperatures. The powders were calcined at 700 and 900 ºC for 4 h and characterized by thermal analysis, X-ray diffraction and scanning electron microscopy techniques. The perovskites are nanometric, single phased and present suitable properties for use in automotive catalysis |
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