FABRICATION OF BaCO₃ NANO-RODS IN WATER/POLY VINYL ALCOHOL MIXED SOLVENTS

Abstract

Barium carbonate nano-particles have been synthesized by a simple PVA-assisted precipitation method using hydrated barium chloride and sodium carbonate as the starting materials. Crystal structure and morphology of the products were evaluated by XRD and SEM techniques, respectively. XRD results indicated that under the identical experimental conditions, single phase BaCO 3 was produced. SEM results showed that in the presence of PVA as guide reagent in the solution, nano-rods with regular (facet) surfaces were obtained. The results also showed that the concentration of PVA in the solution, reaction time and temperature have obvious influence on the agglomeration nature and mean particle size of the products. At high concentration of PVA less agglomerated nano size particles of BaCO 3 were synthesized. Increasing the synthesis time and temperature resulted in increasing the average diameter of BaCO 3 nano-rods. The performance of produced barium carbonate in the processing of barium hexaferrite ceramic magnet via conventional route has been approved.