Title of article :
SYNTHFSISOF Al2o3-Ni COMPOSITEPOWDERSBYCO-PRECIPITATION METHOD
Author/Authors :
Maskani, N School of Metsllorgy and Materials Engineering - Iran University of Science and Technology, Thhran , Naghizadeh, R School of Metsllorgy and Materials Engineering - Iran University of Science and Technology, Thhran , Mirhabibi, A School of Metsllorgy and Materials Engineering - Iran University of Science and Technology, Thhran
Abstract :
The synthesis of micro-sized, uniformly distributed Alz0,-15Vol% Ni powders were studied through three step co-precipitation of hydroxides mixtures from proper solution, calcination at air atmosphere and final step of calcined powders in a carbon bed. AI and Ni hydroxide and amorphous phase were first obtained from their salt:r solutions through chemical co-precipitation method by adjusting pH. The precipitated powders were then calcined to obtain a mixture of their oxides as NiO and NiA/ 204 which were reduced in a carbon bed at various temperatures up
to 13000C. Proper temperature for calcination in air was determined through TG analysis; 9000C. SEM observation
of powders after reduction, revealed micro-sized Ni particles, along with fin distribution of Ni and Alz03 elements. XRD analysis of the calcined sample showed the presence ofNiA/204 and NiO and the same analysisfor the reduced sample confirmed theformation of A/ 203 and Ni.
Keywords :
Composite , AlzO , Carbon Bed , Carbon Bed , Co-Precipitation , NiAiz04
Journal title :
Astroparticle Physics
