Morphology Control of Phosphors Synthesized by Microwave Heating Method
Ba2Gd3Li3Mo8O32:Eu3+ phosphor was prepared using a single mode microwave oven operated at a frequency of 2.45 GHz and a power of 500 W. The temperature of raw materials, mixtures of BaCO3, Gd2O3, Li2CO3, MoO3 and Eu2O3 subjected to microwave irradiation increased to about 1073 K in 120 s, followed by a sharp drop despite irradiating the raw materials continuously. By measuring the dielectric loss factor of the raw materials at 2.45 GHz, the temperature increased could be attributed to the fact that MoO3 absorbs a high proportion of microwave energy. In the case of the microwave heating method, the phosphor particles were highly non-aggregated.
Shinobu Fujihara and Tadashi Takenaka
A. Toda et al., "Morphology Control of Phosphors Synthesized by Microwave Heating Method", Key Engineering Materials, Vol. 445, pp. 233-236, 2010