Effects of Y_(2)O_(3) and transition-metal nitrates on phase,microstructures and PL properties of N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5) melilite  

作　　者：Meng Zhang Zhihui Hu Zhi Chen Juntong Huang Qingming Xiong Renming Shuai Zhijun Feng Xibao Li 

机构地区：[1]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China

出　　处：《Journal of Rare Earths》2021年第10期1282-1288,I0005,共8页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (51862024,51772140,51962023);the Natural Science Foundation of Jiangxi Province (20171ACB21033,20192ACBL21047)。

摘　　要：N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5)(CeSiAlON) melilite was synthesized at 1550 and 1600℃ for 5 h from CeO_(2),Si,Al,and Al_(2)O_(3) in nitrogen by using Y_(2)O_(3) and transition-metal nitrates(Co(NO_(3))_(2)·6 H_(2) O and Ni(NO_(3))_(2)·6 H_(2)O) as additives.The effects of Y_(2)O_(3) and transition-metal nitrates on the phase,microstructures and photoluminescence properties of CeSiAlON melilite were studied.The incorporation of Y_(2)O_(3) 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 5 d-4 f transitions of Ce^(3+),and the additives can enhance the PL emission intensities of specimen significantly.

关 键 词：N-containing Ce_(2)Si_(2.5)Al_(0.5)O_(3.5)N_(3.5)melilite Y_(2)O_(3) Transition-metal nitrates Fiber Photoluminescence properties 

分 类 号：TB34[一般工业技术—材料科学与工程]