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Influence of high temperature annealing in nitrogen on upconversion luminescence of -NaYF4: Yb3+, Er3+ hexagonal sub-microplates (EI CONFERENCE) 会议论文  OAI收割
2012 International conference on Function Materials and Nanotechnology, FMN 2012, May 19, 2012 - May 20, 2012, Zhengzhou, China
作者:  Zhao J.
收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25
The pure -NaYF4: Yb3+  Er3+ hexagonal sub-microplates were successfully prepared by the combination of coprecipitation and hydrothermal methods using sodium citrate as chelator. The size of them is about 600 nm 400 nm (side length thickness). The obtained sample was divided into two parts and one of them was annealed in nitrogen at 300 C for 2 hours. The crystal structure of the -NaYF4: Yb3+  Er3+ hexagonal sub-microplates before and after annealing treatment is hexagonal phase. Under the excitation of 980 nm diode laser  the upconversion luminescence intensity the sample after annealing is much stronger than that of the sample without annealing treatment. High temperature annealing process improved the crystallization of the sample  resulting in the decrease of the nonradiative relaxation and the enhancement of the upconversion luminescence. (2012) Trans Tech Publications  Switzerland.  
Microstructure and Mechanical Properties of a Nitride-Strengthened Reduced Activation Ferritic/Martensitic Steel 期刊论文  OAI收割
Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science, 2012, 卷号: 43A, 期号: 13, 页码: 5079-5087
Q. G. Zhou; W. F. Zhang; W. Yan; W. Wang; W. Sha; Y. Y. Shan; K. Yang
收藏  |  浏览/下载：25/0  |  提交时间：2013/02/05
Methane dehydroaromatization over Mo/HZSM-5 catalyst: Effect of dealumination of HZSM-5 zeolite 期刊论文  OAI收割
chinese journal of catalysis, 2007, 卷号: 28, 期号: 4, 页码: 371-376
作者:  Song Yibing;  Sun Changyong;  Wu Yanqing;  Shen Wenjie;  Lin Liwu
收藏  |  浏览/下载：27/0  |  提交时间：2015/11/11