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

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 ?C and 800 V/cm reached about 0.54 ?A/cm2, which was about two times as strong as that from the un-doped C12A7 (0.23 ?A/cm2) under the same condition. The initiative temperature of the O? emission from the Cs2O-doped C12A7 was about 500 ?C, which was also much lower than the initiative temperature from the un-doped C12A7 (570 ?C) 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?C). 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 Cs2O to C12A7 will lower the initiative emission temperature and enhance the emission intensity.