GB906961A - Improvements in or relating to coating a molybdenum grid with a platinum layer - Google Patents
Improvements in or relating to coating a molybdenum grid with a platinum layerInfo
- Publication number
- GB906961A GB906961A GB26522/61A GB2652261A GB906961A GB 906961 A GB906961 A GB 906961A GB 26522/61 A GB26522/61 A GB 26522/61A GB 2652261 A GB2652261 A GB 2652261A GB 906961 A GB906961 A GB 906961A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- relating
- molybdenum
- platinum layer
- platinum
- 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
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title abstract 6
- 239000011248 coating agent Substances 0.000 title abstract 4
- 238000000576 coating method Methods 0.000 title abstract 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title abstract 3
- 229910052697 platinum Inorganic materials 0.000 title abstract 3
- 229910052750 molybdenum Inorganic materials 0.000 title abstract 2
- 239000011733 molybdenum Substances 0.000 title abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 238000004070 electrodeposition Methods 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/002—Chemical composition and manufacture chemical
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/0022—Manufacture
- H01J2893/0023—Manufacture carbonising and other surface treatments
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Electroplating Methods And Accessories (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
906,961. Plating grid wire of thermionic valves. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 21, 1961 [July 26, 1960], No. 26522/61. Drawings to Specification. Class 41. Molybdenum grid wire of thermionic valves is coated with platinum electrolytically, with a barrier pre-coat of nickel, iron, or cobalt, and then heating at 1200 to 1500 C. to interdiffuse the platinum coating. The pre-coating may be formed by electro-deposition, or by coating with the metal oxide and heating in hydrogen to form the metal as a rough surface. The surface of the molybdenum wire may also be made rough by oxidizing and then reducing the surface metal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL254219 | 1960-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB906961A true GB906961A (en) | 1962-09-26 |
Family
ID=19752490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26522/61A Expired GB906961A (en) | 1960-07-26 | 1961-07-21 | Improvements in or relating to coating a molybdenum grid with a platinum layer |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3200284A (en) |
| CH (1) | CH393551A (en) |
| DE (1) | DE1233229B (en) |
| GB (1) | GB906961A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1223959B (en) * | 1963-09-19 | 1966-09-01 | Siemens Ag | Process for the production of a screen grid tube with cylindrical coaxial electrodes |
| US3772561A (en) * | 1970-04-23 | 1973-11-13 | Gte Sylvania Inc | Electron discharge device grid having enhanced thermal conductivity and reduced secondary emission characteristics |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2539096A (en) * | 1949-09-19 | 1951-01-23 | Eitel Mccullough Inc | Electron tube and grid for the same |
| US2821496A (en) * | 1951-08-03 | 1958-01-28 | Gen Electric | Non-emissive grids |
| US2878549A (en) * | 1955-11-18 | 1959-03-24 | Telefunken Gmbh | Manufacture of delicate grids |
| US3164740A (en) * | 1960-04-29 | 1965-01-05 | Rca Corp | Electron tube grids and method of making the same |
-
1961
- 1961-05-26 US US112816A patent/US3200284A/en not_active Expired - Lifetime
- 1961-07-21 GB GB26522/61A patent/GB906961A/en not_active Expired
- 1961-07-24 DE DEN20367A patent/DE1233229B/en active Pending
- 1961-07-24 CH CH871261A patent/CH393551A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1233229B (en) | 1967-01-26 |
| US3200284A (en) | 1965-08-10 |
| CH393551A (en) | 1965-06-15 |
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