GB1314884A - Manufacturing target electrodes for x-ray tubes - Google Patents

Manufacturing target electrodes for x-ray tubes

Info

Publication number
GB1314884A
GB1314884A GB1314884DA GB1314884A GB 1314884 A GB1314884 A GB 1314884A GB 1314884D A GB1314884D A GB 1314884DA GB 1314884 A GB1314884 A GB 1314884A
Authority
GB
United Kingdom
Prior art keywords
alkali metal
rhenium
electro
mixture
deposited
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
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Publication of GB1314884A publication Critical patent/GB1314884A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes

Landscapes

  • Electroplating Methods And Accessories (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

1314884 Electro-depositing W or W-Re MULLARD Ltd 28 May 1970 25789/70 Heading C7B In manufacturing a rotary target electrode for an X-ray tube, a metal layer of tungsten or tungsten-rhenium is electro-deposited on an electrically conductive substrate disc from a bath of fused salts comprising a mixture of:- (a) an alkali metal tungstate or a mixture of an alkali metal tungstate and an alkali metal acidic rhenium salt, (b) an alkali metal borate or phosphate, and (c) tungstic oxide or a mixture of tungstic and rhenium oxides. Specified conditions are:- a substrate of W, Mo, W-Mo, an alloy based on W or Mo or pre-plated carbon; a W anode; a bath at 850-1000‹C. comprising (a) Na Li Wo 4 and optionally sodium lithium perrhenate, (b)Na Li B 2 O 4 or sodium lithium phosphate and (c) WO 3 and optionally rhenium oxide; a N 2 atmosphere; and electro-deposition using a current density exceeding 0À01A/cm<SP>2</SP>, e.g. using periodic reverse plating with identical forward and reverse currents of 5 A/cm<SP>2</SP> for 10 secs and 1 sec respectively, to produce a deposited layer at least 100 microns thick. Deposited layers may be smoothed by grinding. Specification 777591 is referred to.
GB1314884D 1970-05-28 1970-05-28 Manufacturing target electrodes for x-ray tubes Expired GB1314884A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2578970 1970-05-28

Publications (1)

Publication Number Publication Date
GB1314884A true GB1314884A (en) 1973-04-26

Family

ID=10233337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1314884D Expired GB1314884A (en) 1970-05-28 1970-05-28 Manufacturing target electrodes for x-ray tubes

Country Status (4)

Country Link
BE (1) BE767710A (en)
DE (1) DE2122950A1 (en)
FR (1) FR2093868A5 (en)
GB (1) GB1314884A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661692A1 (en) * 1990-05-04 1991-11-08 Gen Electric Cgr Rhenium deposition process
US11081325B2 (en) 2013-09-05 2021-08-03 Plansee Se Conductive target material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535344A1 (en) * 1982-10-29 1984-05-04 Thomson Csf METHOD FOR SELECTIVE DEPOSITION OF A REFRACTORY METAL LAYER ON A GRAPHITE PIECE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661692A1 (en) * 1990-05-04 1991-11-08 Gen Electric Cgr Rhenium deposition process
US11081325B2 (en) 2013-09-05 2021-08-03 Plansee Se Conductive target material

Also Published As

Publication number Publication date
FR2093868A5 (en) 1972-01-28
DE2122950A1 (en) 1971-12-09
BE767710A (en) 1971-11-26

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees