JPS54129867A - Cathode constituent of direct heating type - Google Patents
Cathode constituent of direct heating typeInfo
- Publication number
- JPS54129867A JPS54129867A JP3676678A JP3676678A JPS54129867A JP S54129867 A JPS54129867 A JP S54129867A JP 3676678 A JP3676678 A JP 3676678A JP 3676678 A JP3676678 A JP 3676678A JP S54129867 A JPS54129867 A JP S54129867A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- base
- heating type
- direct heating
- electron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
PURPOSE: To prevent the deterioration in electron radioactivity, by taking double layer construction for the emitter layer of (Ba, Sr, Ca)O formed on the substrate with coarse and smaller particle layers, in the direct heating type cathode constituent for electron tubes in which the cathode constituent itself is a heater.
CONSTITUTION: On the cathode base 1 with which reducing agent such as Zr, Mg, Si, Al is slightly added to 10 to 30 wt.% W-Ni or 10 to 20 wt.% MO-Ni, the emitter layer of (Ba, Sr, Ca)O or (Ba, Sr)O is formed with the double layer construction having coarse particle layer 2 in contact with the base 1 and smaller particle layer 3 on it. This layer 2 reduces the contact area between the base 1 and the emitter layer and avoid the production of the intermediate layer of W or Mo, and the layer 3 compensates the decrement of the density in the emitter layer to keep the redioactivity of electron for a long time.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3676678A JPS54129867A (en) | 1978-03-31 | 1978-03-31 | Cathode constituent of direct heating type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3676678A JPS54129867A (en) | 1978-03-31 | 1978-03-31 | Cathode constituent of direct heating type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54129867A true JPS54129867A (en) | 1979-10-08 |
Family
ID=12478872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3676678A Pending JPS54129867A (en) | 1978-03-31 | 1978-03-31 | Cathode constituent of direct heating type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54129867A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63307636A (en) * | 1987-06-05 | 1988-12-15 | Mitsubishi Electric Corp | Cathode of electron tube |
| WO1999059178A1 (en) * | 1998-05-14 | 1999-11-18 | Mitsubishi Denki Kabushiki Kaisha | Cathode-ray tube having oxide cathode and method for producing the same |
| WO2002025682A1 (en) * | 2000-09-19 | 2002-03-28 | Koninklijke Philips Electronics N.V. | Cathode ray tube comprising a cathode of a composite material |
-
1978
- 1978-03-31 JP JP3676678A patent/JPS54129867A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63307636A (en) * | 1987-06-05 | 1988-12-15 | Mitsubishi Electric Corp | Cathode of electron tube |
| WO1999059178A1 (en) * | 1998-05-14 | 1999-11-18 | Mitsubishi Denki Kabushiki Kaisha | Cathode-ray tube having oxide cathode and method for producing the same |
| WO2002025682A1 (en) * | 2000-09-19 | 2002-03-28 | Koninklijke Philips Electronics N.V. | Cathode ray tube comprising a cathode of a composite material |
| KR100811719B1 (en) | 2000-09-19 | 2008-03-11 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Cathode ray tube and oxide cathode |
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