2002 Volume 118 Issue 2 Pages 91-94
The composite powders of Ag-NiO were prepared by spray pyrolysis from Ag and Ni loading Versatic Acid 10, which was used for the separation of metals as an extractant. The external shapes and the internal structures of the obtained composite powders were investigated by using SEM, XRD and EPMA.
The composite powders were secondary agglomerates with the particle size of several μm ∼ 10 μm and agglomerate powders were composed of some spherical particles with the size of one micron or less as observed by SEM photographs. The composite powders prepared by spray pyrolysis from the organic phase were the powders comprising Ag-NiO from the analysis of XRD. The Ag-NiO composite powders were made of the Ag layer in the internal region and the Ag-NiO composite layer in the external region from the result of the EPMA analysis. The structure of the obtained powders was different from the internal structure of the composite powders prepared by spray pyrolysis from the metal nitrate solution. The new powder production process where the separation with solvent extraction was carried out , followed by spray pyrolysis, was proposed. In this process the composite powders were prepared by spray pyrolysis from the organic phase loading and refining the targeted elements from the impure raw materials like wastes.
