Papers by Author: Seung Kwon Hong

Abstract: The series of partially Al-substituted lithium manganese oxides were prepared by spray pyrolysis process from spray solutions with citric acid and ethylene glycol. The as-prepared particles obtained from spray solution with citric acid and ethylene glycol turned to fine-sized LiMn(12- x)/6Alx/6O4(0.05≤x≤2) particles with regular morphology after post-annealing. The discharge capacities of the particles post-annealed at temperature of 800oC changed from 128 to 84 mAh/g when the x of the LiMn(12-x)/6Alx/6O4 particles was changed from 0 to 2. The Al-doped LiMn2O4 fine particles prepared by spray pyrolysis from spray solution with citric acid and ethylene glycol had good cycle properties.

Abstract: Tb3Al5O12:Ce (TAG:Ce) phosphor particles were prepared by spray pyrolysis process. The TAG:Ce phosphor particles prepared by spray pyrolysis had good characteristics such as fine size, narrow size distribution, and high photoluminescence intensity under blue light excitation. The TAG:Ce phosphor particles had the maximum photoluminescence intensity after post-treatment at 1550oC under reducing atmosphere. The photoluminescence intensity of the prepared TAG:Ce phosphor particles was 85% of the optimized YAG:Ce phosphor particles.