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Preparation and Characterization of Storage and Emission Functional Material of Cs2O-doped 12CaO·7Al2O3
Shen Ning, Jing Shen, Xing-long Li, Quan-xin Li*
Department of Chemical Physics, Lab of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China
Abstract:
We provides a novel approach to generate low-temperature atomic oxygen anions (O-) emis-sion using the cesium oxide-doped 12CaO·7Al2O3 (Cs2O-doped C12A7). The maximal emis-sion intensity of O- from the Cs2O-doped C12A7 at 700 oC and 800 V/cm reached about 0.54 μA/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 oC, which was also much lower than the initiative temperature from the un-doped C12A7 (570 oC) 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 (<550oC). The emission features of the Cs2-doped C12A7, including the emis-sion 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 paramag-netic resonance. It was found that doping Cs2 to C12A7 will lower the initiative emission temperature and enhance the emission intensity.
Key words:  Atomic oxygen anion, Cs2O-doped C12A7, Emission characteristics, Storage characteristics
FundProject:
附件
掺杂Cs2O的12CaO·7Al2O3型发射材料的制备与特性
宁珅, 沈静, 李兴龙, 李全新*
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
摘要:
研究了掺杂Cs2O的12CaO·7Al2O3(C12A7)型负离子存储发射材料的发射特性、离子发射分支比以及温度对发射强度的影响,同时对该材料的X射线衍射和电子顺磁共振的表征结果进行了分析. C12A7中Cs2O的掺入不仅降低了发射温度,同时还增强了发射强度. 掺杂Cs2O后,在800 V/cm的引出场下,发射温度由570 oC降低至500 oC,在700 oC时,发射强度由0.23 μA/cm<
关键词:  氧负离子,Cs2O掺杂,C12A7,存储特性,发射特性
DOI:10.1088/1674-0068/24/03/335-339
分类号: