Study of the Structural properties of Nickel Calcium Alumina Composites Prepared by Co-precipitation Method

Abstract

Calcium alumina composites powders (CaAl12O19) and Zinc calcium alumina (ZnCaAl2O4) at different weight ratios (wt%) of nickel concentrations and interchange[[ ably with calcium and )]CaO)0.3 (Al2O3(0.7 ] ،(ZnO)x (CaO)0.3-x (Al2O3)0.7 ,where (X = 0, 0.5, 0.10, 0.15, 0.20, 0.25, 0.30), prepared using the Co-Precipitation method . The powders of the composites were prepared at calcined temperature of (700°C) and sintered at (1300°C) for (4h) to obtain the required phases. The structural properties of the prepared composites powders were characterized using) FEIR, FE-SEM, and EDX (techniques. (FTIR) spectroscopy technique of the prepared composites sintering at (1300°C) showed many absorption bands. absorption band at (777cm-1) showed formation of hexagonal structure of (CaAl12O19). while for calcium aluminate (CaAl12O19) doped with zinc oxide (ZnO) showed formation of the spinal phase (ZnAl2O4) at absorption band (667cm-1). (FE-SEM) scanning of (CaAl12O19) composite powder particles were in the form of (acicular) plate with average nanoparticle size (69.39nm). While the particles surfaces of the calcium aluminate composite doped with different weights ratio of zinc oxide (ZnO) where accumulated and compressed with irregular in shape and distribution on acicular calcium plate with average nanoparticle size was between (56.26-81.95)nm . (EDX) technique showed that the all elements percentage of the composites where homogenous and pure without any Impurities material.