The particle size effect on some physical properties of neodymium cobaltate-manganites for hydrogen storage use

The present work deals with the particle size effect on the electrical properties in Neodymium Cobaltate-Manganites System. Neodymium Cobaltate materials could be used as hydrogen storage materials. Nd0.6Sr0.4MnxCo1-xO3; (x = 0, 0.3, 0.7 and 1) were prepared using co-precipitation method from the initial pure chlorides of neodymium, strontium cobalt and manganese to react with pure sodium hydroxide with the proper molar ratio. The synthesized composites were studied in details in terms of their morphological and structural properties. The energy dispersive spectroscopy EDS reveals that the synthesized composites are in proper stoichiometry of the proposed structure. The obtained powder was pressed as disc at 2 T pressure are fired at different temperatures; 650 degrees C, 750 degrees C and 850 degrees C. It was fired for 12h in each temperature. The X-ray analysis exhibited that crystal structure for all composites are the same and possessing single phase with orthorhombic crystal system of space group p(nma) (62). The DC resistivity as a function of temperature was measured in the range from room temperature up to 200 degrees C.