GB520025A - Improvements in or relating to refractory alloy compositions - Google Patents

Improvements in or relating to refractory alloy compositions

Info

Publication number
GB520025A
GB520025A GB20696/38A GB2069638A GB520025A GB 520025 A GB520025 A GB 520025A GB 20696/38 A GB20696/38 A GB 20696/38A GB 2069638 A GB2069638 A GB 2069638A GB 520025 A GB520025 A GB 520025A
Authority
GB
United Kingdom
Prior art keywords
rhenium
per cent
filament
july
hydrogen
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
Application number
GB20696/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB520025A publication Critical patent/GB520025A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H2001/0208—Contacts characterised by the material thereof containing rhenium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

520,025. Electric incandescent lamp filaments. LAISE, C. A. July 12, 1938, No. 20696. Convention date, July 13, 1937. [Class 39 (ii)] [Also in Group II] An alloy suitable for use as X-ray targets, electric contacts, electrodes, and incandescent lamp filaments, consists of over 90 per cent. tungsten, less than 10 per cent. of rhenium, and up to 1 per cent, of vanadium. The alloy may be made by mixing tungsten oxide with a solution of potassium tungstate and an alkali vanadate, drying, powdering, reducing the product in hydrogen, and mixing finely divided rhenium therewith ; or the rhenium may be introduced as a solution of a soluble salt. The resulting powder is pressed into slugs and subjected to working and heat treatment which may include heating in hydrogen at white heat, and, in the case of a filament, may be applied to the filament in coiled form.
GB20696/38A 1937-07-13 1938-07-12 Improvements in or relating to refractory alloy compositions Expired GB520025A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US520025XA 1937-07-13 1937-07-13

Publications (1)

Publication Number Publication Date
GB520025A true GB520025A (en) 1940-04-12

Family

ID=21974767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20696/38A Expired GB520025A (en) 1937-07-13 1938-07-12 Improvements in or relating to refractory alloy compositions

Country Status (1)

Country Link
GB (1) GB520025A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598844A1 (en) * 2003-01-17 2005-11-23 Hamamatsu Photonics K. K. Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598844A1 (en) * 2003-01-17 2005-11-23 Hamamatsu Photonics K. K. Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube
EP1598844A4 (en) * 2003-01-17 2006-12-06 Hamamatsu Photonics Kk Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube
US7772771B2 (en) 2003-01-17 2010-08-10 Hamamatsu Photonics K.K. Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube

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