Floating Zone Growth and Thermionic Emission Property of Single Crystal CeB_(6)

作     者：BAO Li-Hong ZHANG Jiu-Xing ZHOU Shen-Lin ZHANG Ning XU Hong 包黎红;张久兴;周身林;张宁;徐宏

作者机构：Key Laboratory of Advanced Functional Materials Ministry of EducationCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124 Institute of Laser EngineeringBeijing University of TechnologyBeijing 100124 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2011年第28卷第8期

页      面：318-321页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：by the National Natural Science Foundation of China under Grant No 50871002 

主　　题：stability crystal Crystal 

摘      要：Large-sized and high-quality cerium hexaboride(CeB6)single crystals are successfully grown by the optical floating zone *** structure,chemical composition and thermionic emission properties of the crystal are characterized by x−ray diffraction,x-ray fluorescence and emission measurements,*** on the observation of single crystal diffraction,the relative density of feed rods has a great effect on the quality of the grown *** thermionic emission measurement results show that the emission current density of the single crystal is 47.1 A/cm^(2) at 1873 K with an applied voltage of 1 kV,which is about two times larger than the value for polycrystalline *** single crystal possesses excellent emission current ***,it is expected that CeB6 single crystal is a very promising material for thermionic cathode applications.