Reactivity of lime and related oxides. XIX. Production of strontium oxide

Strontium oxide has been prepared by calcining the hydroxide and the carbonate at several temperatures up to 1200°. Strontium hydroxide sinters considerably before decomposing above 500°. There is appreciable carbonation of the oxide products by atmospheric carbon dioxide at temperatures up to 800°. Strontium carbonate decomposes at a reasonable yield at temperatures above 1000°. The oxide products can be activated by milling, but they sinter when subsequently calcined, especially at temperatures between 800° and 1000°. Crystallite and aggregate sizes of the strontium oxide produced from the carbonate at 1000°–1200° are similar to those of lime prepared under corresponding conditions.