Loss mechanism of rare-earth tungsten cathode applied to high-temperature electrostatic precipitation

摘要：

Rare-earth tungsten thermionic emission material was used in the high-temperature electrostatic dust removal technology.A static test facility was self-designed to explore the emission characteristic.XRD,SEM and EDS were used to analyze the microstructure and element distribution.Working in high-temperature and oxidizing condition,tungsten in the thermionic emission materials is oxidized to tungsten trioxide,but the rare-earth tungstate in the grain boundary has no chemical changes.In high-temperature and oxidizing ambience,there is oxidation and volatilization on the surface of rare-earth tungsten,resulting in materials loss.The degree of loss depends on the composition of gas.

关键词： Rare-earth tungsten Thermionic emission Cathode loss Microstructure

作者: Jinjin Xu Zhongzhu Gu Xiaoli Xi Weimin Dai Juanjuan Liu

作者单位: School of Energy & Environment,Southeast University,Nanjing 210096,China College of Power Engineering,Nanjing Normal University,Nanjing 210042,China College of Material Science and Engineering,Beijing University of Technology,Beijing 100022,China

会议类型: 国际会议

会议名称: 2010 International Conference of Environment Materials and Environment Management(2010年环境材料与环境管理国际学术会议 EMEM 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 908-912

在线出版日期: 2010-07-24（万方平台首次上网日期，不代表论文的发表时间）