Rare earth materials have found wide applications in many catalytic areas due to theirunique properties depending on the peculiar electronic structures of rare earth elements,however, there are few studies on rare earth materials in catalytic combustion of compositesolid propellants. Besides their electronic structures, the catalytic properties of rare earthmaterials are intimately related to their composition, size, phase, dispersibility, specificsurface areas and surface state, et al. Therefore,...