Low Temperature Synthesis of ZnNb2O6 Fine Powders by Wet-Chemical Processes

Low temperature synthesis of ZnNb2O6 fine powders was conducted by several improved wet-chemical processes. ZnNb2O6 fine powders could be obtained at 250 degrees C from the K8Nb6O19 and ZnCl2 aqueous solutions with pH = 14, where ammonia was used as the mineralizer. The homogenous microstructures were observed for the ZnNb2O6 fine powders after prolonging the reaction time to 24 h. ZnNb2O6 fine powders could also be obtained by calcining the resultant dry solid suspension of K8Nb6O19 and ZnCl2 aqueous solution with H3BO3 as the catalysis at 500 degrees C in air for 2h. The improved methods to prepare the ultrafine ZnNb2O6 powder made great progress in solving the problem of Zn volatilization.