Lanthanum
chromites partially substituted by calcium,strontium and barium synthesized
by urea combustion |
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Authors: | Érika Pinto Marinho A G Souza Danniely S de Melo Iêda M G Santos Dulce M A Melo Walquíria J da Silva |
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Institution: | 1.Departamento de Química,Universidade
Federal da Paraíba,Jo?o Pessoa,Brazil;2.Departamento de Química,Universidade
Federal do Rio Grande do Norte,Natal,Brazil |
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Abstract: | Because
of their electrical, magnetic and catalytic properties rare earth and transition
metal mixed oxides are important compounds. Lanthanum chromites have been
extensively used as solid oxide fuel cell (SOFC) interconnect materials. In
this work, lanthanum chromites partially substituted by alkaline earth metals
were synthesized by the urea combustion process. TG and DSC techniques were
used to evaluate the presence of the organic material in the powder after
reaction on the hot plate. The powders were calcinated at 900°C and characterized
by XRD and SEM. The results show that the particles have nanometric dimensions
and the perovskite structure was formed. |
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Keywords: | |
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