GB796884A - Improvements in or relating to thermionic valves having envelope apertures hermetically sealed - Google Patents
Improvements in or relating to thermionic valves having envelope apertures hermetically sealedInfo
- Publication number
- GB796884A GB796884A GB2062555A GB2062555A GB796884A GB 796884 A GB796884 A GB 796884A GB 2062555 A GB2062555 A GB 2062555A GB 2062555 A GB2062555 A GB 2062555A GB 796884 A GB796884 A GB 796884A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- powder
- brazing
- grams
- per cent
- 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
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/02—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
- C04B37/023—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used
- C04B37/026—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used consisting of metals or metal salts
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6582—Hydrogen containing atmosphere
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- C—CHEMISTRY; METALLURGY
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
- C04B2237/12—Metallic interlayers
- C04B2237/122—Metallic interlayers based on refractory metals
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
- C04B2237/12—Metallic interlayers
- C04B2237/123—Metallic interlayers based on iron group metals, e.g. steel
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- C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
- C04B2237/12—Metallic interlayers
- C04B2237/124—Metallic interlayers based on copper
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
- C04B2237/12—Metallic interlayers
- C04B2237/126—Metallic interlayers wherein the active component for bonding is not the largest fraction of the interlayer
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- C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
- C04B2237/32—Ceramic
- C04B2237/34—Oxidic
- C04B2237/343—Alumina or aluminates
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- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/52—Pre-treatment of the joining surfaces, e.g. cleaning, machining
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/59—Aspects relating to the structure of the interlayer
- C04B2237/592—Aspects relating to the structure of the interlayer whereby the interlayer is not continuous, e.g. not the whole surface of the smallest substrate is covered by the interlayer
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- C—CHEMISTRY; METALLURGY
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/62—Forming laminates or joined articles comprising holes, channels or other types of openings
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/64—Forming laminates or joined articles comprising grooves or cuts
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/70—Forming laminates or joined articles comprising layers of a specific, unusual thickness
- C04B2237/708—Forming laminates or joined articles comprising layers of a specific, unusual thickness of one or more of the interlayers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/72—Forming laminates or joined articles comprising at least two interlayers directly next to each other
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/78—Side-way connecting, e.g. connecting two plates through their sides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Lasers (AREA)
Abstract
796,884. Soldering and brazing. M.-O. VALVE CO., Ltd. July 6, 1956 [July 15, 1955]. No. 20625/55. Class 83 (4). [Also in Group XL (a)] In a thermionic valve having a sealed envelope 6 including a metal part 1 having an aperture hermetically closed by a disc 3, the disc has been cut from a corundum crystal, has a metal coating 4 bonded to its margin and is attached to the envelope by a metallic joint between the coating and the metal part. A cylindrical cup 1 of 43 per cent nickel 57 per cent iron alloy made by powder metallurgy has a shouldered circular aperture into which is fitted a coated disc of corundum, the surface of the cup having been cleaned by heating in wet hydrogen at 1000 ‹ C. and the parts adjacent the aperture where brazing is not required having been painted with alumina. The coating 4 is formed on the disc by preparing a paste from a powder of 160 grams of molybdenum powder and 40 grams of manganese powder by adding to 6 grams of the'powder 12 cc. of a binder made by dissolving 1.5 grams of pyroxylin in ethyl lactate, painting the paste on the disc which has been degreased with carbon tetrachloride, baked and masked where metallizing is not required, drying the paste in hot air and heating in wet hydrogen at 1400 C. to sinter the powder to the disc. The layer is cleaned and flashed with nickel electrolytically deposited. With the disc in the aperture a ring of brazing alloy 70 per cent copper 30 per cent silver is placed on the disc and the assembly heated in hydrogen at 800‹ C. to effect brazing. The cup is spigoted and soldered or brazed into the wall 6 of the envelope of a klystron or magnetron and a flanged nickel tube 8 is soldered or brazed to the wall for attachment to a waveguide. Soldering or diffusion sealing may be alternatives to brazing and the corundum may be formed by deposition and crystallization of fused alumina. Specification 796,883 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2062555A GB796884A (en) | 1955-07-15 | 1955-07-15 | Improvements in or relating to thermionic valves having envelope apertures hermetically sealed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2062555A GB796884A (en) | 1955-07-15 | 1955-07-15 | Improvements in or relating to thermionic valves having envelope apertures hermetically sealed |
Publications (1)
Publication Number | Publication Date |
---|---|
GB796884A true GB796884A (en) | 1958-06-18 |
Family
ID=10149027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2062555A Expired GB796884A (en) | 1955-07-15 | 1955-07-15 | Improvements in or relating to thermionic valves having envelope apertures hermetically sealed |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB796884A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2187036A (en) * | 1986-02-21 | 1987-08-26 | Philips Electronic Associated | Cathode ray tube |
-
1955
- 1955-07-15 GB GB2062555A patent/GB796884A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2187036A (en) * | 1986-02-21 | 1987-08-26 | Philips Electronic Associated | Cathode ray tube |
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