Preparation and Characterization of Storage and Emission Functional Material of Cs2O-doped 12CaO.7Al2O3  

掺杂Cs2O的12CAO．7Al2O3型发射材料的制备与特性

作　　者：宁珅[1] 沈静[1] 李兴龙[1] 李全新[1] 

机构地区：[1]中国科学技术大学化学物理系,生物质洁净能源实验室,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2011年第3期335-339,I0004,共6页化学物理学报（英文）

基　　金：This work is supported by the National Natural Science Foundation of China （No.50772107）, the National High Tech Research and Development Program （No.2009AA05Z435）, and the National Basic Research Program of the Ministry of Science and Technology of China （No.2007CB210206）.

摘　　要：We provides a novel approach to generate low-temperature atomic oxygen anions （O-） emission using the cesium oxide-doped 12CaO.7Al2O3 （Cs2O-doped C12A7）. The maximal emission intensity of O- from the Cs2O-doped C12A7 at 700℃ and 800 V/cm reached about 0.54μA/cm2, which was about two times as strong as that from the un-doped C12A7 （0.23 μA/cm2） under the same condition. The initiative temperature of the O- emission from the Cs2O-doped C12A7 was about 500 ℃, which was also much lower than the initiative temperature from the un-doped C12A7 （570 ℃） in the given field of 800 V/cm. High pure O- emission close to 100% could be obtained from the Cs2O-doped C12A7 under the lower temperature （〈550℃）. The emission features of the Cs2O-doped C12A7, including the emission distribution, temperature effect, and emission branching ratio have been investigated in detail and compared with the un-doped C12A7. The structure and storage characteristics of the resulting material were also investigated via X-ray diffraction and electron paramagnetic resonance. It was found that doping Cs2Oto C12A7 will lower the initiative emission temperature and enhance the emission intensity

关 键 词：Atomic oxygen anion Cs2O-doped C12A7 Emission characteristics Storage characteristics 

分 类 号：O[理学]