铝酸盐结构对阴极性能影响的初步探讨
Study on the influence of aluminates structure on cathode characteristics
-
摘要: 用XRD技术对浸渍Ba-W阴极所用的铝酸盐(6BaO:CaO:2Al2O3)结构进行了分析。结果表明俄罗斯和国内某单位的铝酸盐峰位较复杂,结构不单一。该文作者用新的配方,新的烧结方式生成了主峰为Ba5CaAl4O12的结构单一的铝酸盐,且烧结温度比传统烧结温度低200℃,单一结构的铝酸盐具有浸渍温度低、发射较好、性能稳定、蒸发少等特点,从而可望改善Ba-W阴极的性能。Abstract: The structure of aluminates which are used for Ba-W cathode is analyzed by XRD technology. It has been shown that the aluminates produced by some companies in Russian and our country are very complicated. The main single structure (Ba5CaAl4O12) of the aluminates has been formed by a new firing technology and new prescription. Its firing temperature; is 200C lower than that of conventional method. The melting point of the aluminates is lower than that of the conventional one. The cathode impregnated with the new aluminateH has high and stable emission current and low evaporation, which can improve the characteristics of Ba-W cathode.
-
I. Brodie, R. O Jenkins, Research on emission character of Ba-W cathode, British J. Appl. Phys.,1957, 28(1), 27-31.[2]K. Dudley.[J].Emission evaporation properties of a barium calcium aluminate impregnated cathode as a function of its composition, Proc. of the 5th National Conference on Advances in electron tube technique.1961,:-[3]L.R. Falce, Dispenser cathodes: the current state of the technology, IEEE Trans. on Electron Devices, 1983, 17(4), 448-451.[4]吴兆皓,论述钡钨阴极发射面的本质,真空电子学会第四届学术年会论文摘要汇编,咸阳,1982,133-141.[5]谢有畅等,结构化学,成都,电子科技大学出版社,1990,40-102.[6]T. Sakurai , K. Sato, C. Kimura, An improved dispenser cathode, IEEE Trans. on Electron Devices, 1984, 12(3), 322-325.[7]张恩虬,关于热电子发射的评述(Ⅲ)一动态表面发射中心,物理学报,1976,25(1),23-30. -
计量
- 文章访问数: 2136
- HTML全文浏览量: 113
- PDF下载量: 713
- 被引次数: 0
下载:
