李镇江

+

其他联系方式

  • 邮箱:

论文成果

当前位置: 中文主页 > 科学研究 > 论文成果

Temperature-controlled synthesis, thermodynamics and field emission properties of beta-SiC/SiO2 coaxial heterojunction emitters

  • 发布时间:2023-10-19
  • 点击次数:

  • 关键字:
  • 摘要:beta-SiC/SiO2 coaxial heterogeneous emitters composed of a SiC nanowire core and a uniform amorphous SiO2 coating have been fabricated via the chemical vapor deposition (CVD) technique. The effect of synthesis temperature on the yield, microstructure, and chemical composition of the products was systematically analysed. A rational explanation for the growth of the beta-SiC/SiO2 emitter was proposed and analysed from the perspective of the reaction thermodynamics. The field emission behaviors of the beta-SiC/SiO2 coaxial nanocables exhibit a strong dependence on the synthesis temperatures. Excellent performances with a low turn-on field (E-to) of 0.63 V mu m(-1) and threshold field (E-th) of 1.92 V mu m(-1) have been recorded at 1200 degrees C. Furthermore, the optimized cathode shows remarkable electron emission stability with the fluctuation of the current density being less than 5.7% after a 3 h long lifetime test.
  • 卷号:6
  • 期号:61
  • 是否译文:

崂山校区 - 山东省青岛市松岭路99号   
四方校区 - 山东省青岛市郑州路53号   
中德国际合作区(中德校区) - 山东省青岛市西海岸新区团结路3698号
高密校区 - 山东省高密市杏坛西街1号   
济南校区 - 山东省济南市文化东路80号©2015 青岛科技大学    
管理员邮箱:master@qust.edu.cn