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Effects of Y2O3 and transition-metal nitrates on phase, microstructures and PL properties of N-containing Ce2Si2.5Al0.5O3.5N3.5 melilite
Journal of Rare Earths ( IF 5.2 ) Pub Date : 2020-08-15 , DOI: 10.1016/j.jre.2020.08.004
Meng Zhang , Zhihui Hu , Zhi Chen , Juntong Huang , Qingming Xiong , Renming Shuai , Zhijun Feng , Xibao Li

N-containing Ce2Si2.5Al0.5O3.5N3.5 (CeSiAlON) melilite was synthesized at 1550 and 1600 °C 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, microstructures 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 transitions of Ce3+, and the additives can enhance the PL emission intensities of specimen significantly.



中文翻译:

Y2O3和过渡金属硝酸盐对含氮Ce2Si2.5Al0.5O3.5N3.5黄长石相、显微组织和PL性能的影响

含N的Ce 2的Si 2.5的Al 0.5 ø 3.5 Ñ 3.5(CeSiAlON)黄长石在1550和1600℃合成5小时从的CeO 2,硅,铝,和Al 2 ö 3通过使用的Y氮气2 ö 3和过渡金属硝酸盐(Co(NO 3 ) 2 ∙6H 2 O 和 Ni(NO 3 ) 2 ∙6H 2 O)作为添加剂。Y 2 O 3 的影响研究了过渡金属硝酸盐对 CeSiAlON 黄长石相、微观结构和光致发光性能的影响。Y 2 O 3的掺入可以在较低程度上促进原料反应,并且由于Y原子的半径小于Ce原子的半径而导致CeSiAlON的晶胞收缩。过渡金属硝酸盐可以明显加速反应并促进CeSiAlON纤维的形成。由于Ce 3+的5d-4f跃迁,CeSiAlON黄晶石的光致发光(PL)特性呈现板紫发射带,添加剂可以显着提高样品的PL发射强度。

更新日期:2020-08-15
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