Wang Haifeng, Lu Jianwei, Wang Ruoxuan, Dong Yungu, Ding Linfeng
College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Engineering Research Center of Advanced Glass Manufacturing Technology, Ministry of Education, Donghua University, Shanghai 201620, China.
Materials (Basel). 2020 Feb 15;13(4):874. doi: 10.3390/ma13040874.
The synthesis process has a significant influence on the properties of CaTiO:Eu phosphors; thus, an optimized process will lead to a better performance of the CaTiO:Eu phosphors. In this work, the feasibility of synthesizing the CaTiO:Eu phosphor with a good luminescent performance by combining the chemical co-precipitation method and microwave-assisted sintering was studied. The precursor of CaTiO:Eu phosphors were prepared by the chemical co-precipitation method. To find an optimized process, we applied both of the traditional (furnace) sintering and the microwave-assisted sintering to synthesize the CaTiO:Eu phosphors. We found out that a sintering power of 528 W for 50 min (temperature around 950 °C) by a microwave oven resulted in similar emission intensity results compared to traditional furnace sintering at 900 °C for 2.5 h. The synthesized CaTiO:Eu phosphors has an emission peak at 617 nm (D→F), which corresponds to the red light band. This new synthesized method is an energy efficient, time saving, and environmentally friendly means for the preparation of CaTiO:Eu red phosphor with good luminescent performance.
合成工艺对CaTiO:Eu荧光粉的性能有显著影响；因此，优化的工艺将使CaTiO:Eu荧光粉具有更好的性能。在本工作中，研究了通过化学共沉淀法与微波辅助烧结相结合来合成具有良好发光性能的CaTiO:Eu荧光粉的可行性。采用化学共沉淀法制备了CaTiO:Eu荧光粉的前驱体。为了找到优化的工艺，我们同时采用传统（炉）烧结和微波辅助烧结来合成CaTiO:Eu荧光粉。我们发现，与在900℃下传统炉烧结2.5小时相比，用微波炉在528W功率下烧结50分钟（温度约950℃）可得到相似的发射强度结果。合成的CaTiO:Eu荧光粉在617nm处有一个发射峰（D→F），对应于红光波段。这种新的合成方法是一种节能、省时且环保的手段，用于制备具有良好发光性能的CaTiO:Eu红色荧光粉。
