ALUMINOTHERMIC REDUCTION OF LANTHANUM, CERIUM, AND PRASEODYMIUM OXIDES

Aluminum alloys containing up to 30 to 50% rare earths were prepared by external alumino-thermoreduction of oxides. Maximum La content in alloys was 27.65% with 18.7% La yield into the alloy. The optimum yields of Ce and Pr were 32.0 and 28.0%, respectively. At high reaction rates (>1100 kcal/kg) the charge burned furiously. The optimum reaction for a charge of 0.105-nm aluminum powder was found a…