Effects of Y2O3 and transition-metal nitrates on phase,microstructures and PL properties of N-containing Ce2Si2.5Al0.5O3.5N3.5 melilite

• 作者: Meng Zhang Zhihui Hu Zhi Chen Juntong Huang Qingming Xiong Renming Shuai Zhijun Feng Xibao Li
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（10）
• 所属期刊栏目: RARE EARTHS APPLICATIONS
• 页码范围: 1282-1288
• 页数: 7页
• 语种: 英文

摘要

N-containing Ce2Si2.5Al0.5O3.5N3.5 (CeSiAlON) melilite was synthesized at 1550 and 1600 ℃ for 5 h from CeO2,Si,Al,and Al2O3 in nitrogen by using Y2O3 and transition-metal nitrates (Co(NO3)2·6H2O and Ni(NO3)2·6H2O) as additives.The effects of Y2O3 and transition-metal nitrates on the phase,micro-structures and photoluminescence properties of CeSiAlON melilite were studied.The incorporation of Y2O3 can promote the reaction of raw materials to a low degree,and results in a unit cell shrinkage of CeSiAlON due to the smaller radius of Y atom than that of Ce atom.The transition-metal nitrates can accelerate the reaction clearly and facilitate the formation of CeSiAlON fibers.The photoluminescence(PL) properties of CeSiAlON melilite presents a board violet emission band because of the 5d-4f tran-sitions of Ce3+,and the additives can enhance the PL emission intensities of specimen significantly.