An x-ray diffraction study of the kinetics of formation of barium-calcium aluminates and tungstates

Summary

By making use of x-ray phase analysis it is possible to determine the technological conditions for preparing barium-calcium tungstates and aluminates. It has been shown that the preparation of barium-calcium aluminates by combined precipitation of substances which form the aluminates on subsequent ignition makes it possible to increase the purity of the product obtained and to decrease the temperature and shorten the duration of the ignition. This is probably related to the fact that during the combined precipitation, thorough mixing of the original components takes place, facilitating the course of the reaction in the solid phase. In the preparation of tungstates by the combined precipitation method, however, no significant decrease in the temperature or duration of ignition were obtained.