Rare earth oxide refractory metal salt impregnated w based directly-heated cathode
文献类型：期刊论文
| 作者 | Qi Shi-Kai1,2; Wang Xiao-Xia1; Luo Ji-Run1; Hu Ming-Wei1,2; Li Yun1 |
| 刊名 | Journal of inorganic materials
 |
| 出版日期 | 2016-09-20 |
| 卷号 | 31期号:9页码:987-991 |
| 关键词 | Directly-heated cathode Rare earth oxide Thermionic emission Lifetime Emission mechanism |
| ISSN号 | 1000-324X |
| DOI | 10.15541/jim20160008 |
| 通讯作者 | Qi shi-kai(kaishiqi@126.com) |
| 英文摘要 | Cathode plays an important role in the magnetron. in order to enhance the emission current, reduce the operation temperature and prolong the lifetime of the pure w cathode applied in the magnetron, a new la2o3/y2o3-gd2o3-zro2 impregnated w based directly-heated cathode was developed. the thermionic emission properties of the la2o3/y2o3-gd2o3-zro2 impregnated cathode were measured. the results show that the la2o3-gd2o3-zro2 impregnated cathode can provide more than 0.18 a/cm(2) current density for the space charge limitation (scl) at 1600 degrees c. under the same thermionic emission level, the working temperature of the la2o3-gd2o3-zro2 impregnated cathode is at least 300 degrees c lower than that of the pure w cathode. lifetime of the la2o3-gd2o3-zro2 impregnated cathode reaches 2100 h at 1750 degrees c with dc load of 0.5 a/cm(2). the y2o3-gd2o3-zro2 impregnated cathode can provide more than 0.6 and 3.4 a/cm(2) current density for scl at 1400 degrees c, 1700 degrees c, respectively. under the same thermionic emission level, the working temperature of the y2o3-gd2o3-zro2 impregnated cathode is at least 400 degrees c, lower than that of the la2o3-gd2o3-zro2 impregnated cathode. lifetime of the y2o3-gd2o3-zro2 impregnated cathode reaches 2600 h at 1600 degrees c with dc load of 1.5 a/cm(2). at last, the thermionic emission mechanisms of the two new impregnated cathodes are discussed reasonably. |
| WOS关键词 | EMISSION |
| WOS研究方向 | Materials Science |
| WOS类目 | Materials Science, Ceramics |
| 语种 | 英语 |
| WOS记录号 | WOS:000383397000014 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2375977 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Qi Shi-Kai |
| 作者单位 | 1.Chinese Acad Sci, Inst Elect, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi Shi-Kai,Wang Xiao-Xia,Luo Ji-Run,et al. Rare earth oxide refractory metal salt impregnated w based directly-heated cathode[J]. Journal of inorganic materials,2016,31(9):987-991. |
| APA | Qi Shi-Kai,Wang Xiao-Xia,Luo Ji-Run,Hu Ming-Wei,&Li Yun.(2016).Rare earth oxide refractory metal salt impregnated w based directly-heated cathode.Journal of inorganic materials,31(9),987-991. |
| MLA | Qi Shi-Kai,et al."Rare earth oxide refractory metal salt impregnated w based directly-heated cathode".Journal of inorganic materials 31.9(2016):987-991. |
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来源：中国科学院大学
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