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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tarter, J.O. Farrell, J.J. |
| Copyright Year | 2004 |
| Description | Author affiliation: Semicon Associates, Lexington, KY, USA (Tarter, J.O.; Farrell, J.J.) |
| Abstract | Summary form only given. The dispenser cathode consists of a porous tungsten matrix impregnated with a barium rich impregnant material. This impregnant material reacts with the tungsten matrix to produce barium which, in conjunction with oxygen, produces a barium-oxygen dipole monolayer on the cathode surface. Many types of impregnant materials have been used over the years. These are identified by their constituent molar ratios of barium oxide (BaO), calcium oxide (CaO) and aluminum oxide (Al/sub 2/O/sub 3/). This paper discusses the relative advantages and disadvantages of several commonly used impregnant types including 5-3-2, 4-1-1, 3-1-1, and 6-1-2. Barium evaporation rate, resistance to poisoning, and common operating temperatures are discussed. |
| Sponsorship | IEEE Elec. Devices Soc |
| Starting Page | 301 |
| Ending Page | 302 |
| File Size | 75357 |
| Page Count | 2 |
| File Format | |
| ISBN | 0780382617 |
| DOI | 10.1109/IVELEC.2004.1316329 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-04-27 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Cathodes Barium Toxicology Tungsten Drives Continuous production Calcium Aluminum oxide Surface resistance Temperature |
| Content Type | Text |
| Resource Type | Article |
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