Hydrothermal Synthesis and Characterization of Flowerlike YBO_3∶Eu~(3+)

YBO3∶Eu3+ microspheres with flower-like structures were fabricated by a facile hydrothermal method.The composition,structure and morphology of obtained YBO3∶Eu3+ were studied by means of XRD、EDX,HRTEM and SEM.The as-prepared YBO3∶Eu3+ microspheres show hexagonal vaterite phase with the elements of Y,O,B,Eu to be found.The YBO3 microspheres,with an average diameter of 1-2μm,are composed of nanosheets with thickness of 100nm.The formation mechanism of the flower-like structures is also proposed.The YBO3∶Eu3+ samples have a strong red emission at 612nm and a high R/O ratio under ultraviolet excitation,which indicate lower symmetry of crystal field around Eu3+ in such flower-like structures.