GB1034107A - Improvements relating to emissive cathodes - Google Patents
Improvements relating to emissive cathodesInfo
- Publication number
- GB1034107A GB1034107A GB3000962A GB3000962A GB1034107A GB 1034107 A GB1034107 A GB 1034107A GB 3000962 A GB3000962 A GB 3000962A GB 3000962 A GB3000962 A GB 3000962A GB 1034107 A GB1034107 A GB 1034107A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- alkaline earth
- cathode
- nitrocellulose
- cathodes
- 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.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 239000000020 Nitrocellulose Substances 0.000 abstract 2
- 239000011230 binding agent Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 229920001220 nitrocellulos Polymers 0.000 abstract 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 abstract 1
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 1
- 229910052788 barium Inorganic materials 0.000 abstract 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000001680 brushing effect Effects 0.000 abstract 1
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract 1
- 239000010406 cathode material Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000001962 electrophoresis Methods 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 229910052712 strontium Inorganic materials 0.000 abstract 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
1,034,107. Thermionic cathodes. THORNAEI RADIO VALVES & TUBES Ltd. July 9, 1963 [Aug. 3, 1962], No. 30009/62. Heading H1D. In a method of making emissive cathode material suitable for formation into cathode structures, an alkaline earth material is applied to a sintered layer of metal powder on a metal substrate, and thereafter subjected to pressure to consolidate the layer of sintered metal and alkaline earth material and reduce its thickness from an initial value of about 50Á to a value in the range 12-25 Á. In particular, a strip of cathode nickel alloy may be coated with a suspension of carbonyl nickel powder, 2-3 Á particle size, in an organic binder, e.g. nitrocellulose or methyl methacrylate, by spraying, brushing &c., or electrophoresis. After sintering at 800-1000‹ C. in a hydrogen-containing atmosphere, this layer is impregnated with a co-precipitated alkaline earth carbonate mixture comprising, by weight, 55% barium, 41% strontium, and 4% calcium carbonate, suspended in a solution of nitrocellulose. After drying, the impregnated layer is compacted between rollers. A specific example is given. The coated strip is used to form cathodes for thermionic valves, the organic binder being driven off, and the carbonates converted to oxides, during valve processing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL296124D NL296124A (en) | 1962-08-03 | ||
| GB3000962A GB1034107A (en) | 1962-08-03 | 1962-08-03 | Improvements relating to emissive cathodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3000962A GB1034107A (en) | 1962-08-03 | 1962-08-03 | Improvements relating to emissive cathodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1034107A true GB1034107A (en) | 1966-06-29 |
Family
ID=10300787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3000962A Expired GB1034107A (en) | 1962-08-03 | 1962-08-03 | Improvements relating to emissive cathodes |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB1034107A (en) |
| NL (1) | NL296124A (en) |
-
0
- NL NL296124D patent/NL296124A/xx unknown
-
1962
- 1962-08-03 GB GB3000962A patent/GB1034107A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL296124A (en) |
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