Peculiarities of the Formation of Nanostructured Powders of Complex Oxide Materials Using the Technology of Continuous Solid-Phase Synthesis

摘要

Experimental results concerning the formation of nanostructured powders of complex oxides using the technology of a continuous solid-phase synthesis are discussed. It is shown that the synthesized powders are a set of nanostructured macroobjects whose formation obeys uniform regularities despite substantial differences in solid-phase reactions for individual oxide materials. The peculiarities of controlling the morphol- ' ogy of nanostructured macroobjects and granulometric composition of the synthesized powders are considered. It has been shown that the predominant influence on the optimization of sizes of formed nanostructured macroobjects is the temperature of synthesis, while the synthesis duration affects the optimal relation between them. In this case, the formation of the granulometric composition of the synthesized oxide material proceeds directly in the course of synthesis by the continuous self-optimization of the system as a whole. It has been shown that the use of continuous solid-phase technology allows us to synthesize strontium aluminate and lithium iron phosphate directly in an air medium.