US3919124A - X-ray tube anode - Google Patents

X-ray tube anode Download PDF

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Publication number
US3919124A
US3919124A US323639A US32363973A US3919124A US 3919124 A US3919124 A US 3919124A US 323639 A US323639 A US 323639A US 32363973 A US32363973 A US 32363973A US 3919124 A US3919124 A US 3919124A
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US
United States
Prior art keywords
percent
ray tube
anode
titanium dioxide
layer
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 - Lifetime
Application number
US323639A
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English (en)
Inventor
Rudolf Friedel
Richard Lauterbach
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Siemens AG
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3919124A publication Critical patent/US3919124A/en
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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
    • H01J35/105—Cooling of rotating anodes, e.g. heat emitting layers or structures

Definitions

  • An X-ray tube anode produced in accordance with the principles of the present invention is characterized in that the black material of the layer consists of a heating product of a mixture which contains titanium dioxide and additions of at least one other oxide which melts with difficulty.
  • additions can be used aluminum oxide Mo, and calcium oxide CaO.
  • a mixture of 50 percent TiO, and 50 percent A1 a deeply black substance is produced which has a high reflection coefficient in the entire temperature range.
  • this material does not enter into any reactions below the melting point of the layer with materials generally used for the making of rotary anodes, such as molybdenum, tungsten, tantalum and niobium, and steam pressure is very small.
  • a further advantage is that these substances excellently adhere to the cleaned and roughened outer surfaces of these materials.
  • the roughening is usually accomplished by sand jets and the cleaning by defattening, treatment with ultrasound, cauterizing or glowing.
  • the additions of TiO greatly increase the stability of the layer without affecting the reflection action to any substantial extent, as long as the TiO, content does not drop below about percent.
  • a mixture of 68 percent Ca() and 32 percent TiO for example, has a melting point of above 2lO0C.
  • X-ray tube anodes can be coated with the material of the present invention preferably for example, by plasma spraying or a similar process.
  • enamelling methods are also useable in that, for example, a mixture of the two oxides is applied as a pulverulent layer by means of a binder upon the surfaces to be coated and then is heated for about one half hour at a temperature of about l600C.
  • the selections of the temperature and of heating duration are not critical, they must be only provided so as to attain the desired reaction and adhesion.
  • the coating which was originally white will have a deep black well reflecting coloring.
  • the thickness of the larger is so measured 2 that a good covering is provided. Depending upon the granulation of the material thicknesses from a few t to about 100 u are sufficient.
  • FIGURE is a perspective view of an X-ray tube 1 with a partly broken off case and a broken off rotary anode plate.
  • the glass case 2 carries at one end the cathode 3 with connecting lines 4, 5 and 6 and at the other end the rotary anode 7 consisting of the rotor 8 and the anode plate 9.
  • the case 2, the cathode 3 and the rotary anode 7 are all constructed in the usual known manner.
  • the plate 9 has a carrying body 10 of a molybdenumtungsten alloy which contains 5 percent tungsten and percent molybdenum in addition to unavoidable impurities. Surfaces l2 and I3 struck by electrons are inclined at different angles to the plate axle 1] and are coated with a layer 14 which is 1.5 mm thick and consists ot a tungsten alloy containing 10 percent rhenium.
  • the plate 9 is coated upon its bottom side, at the edge and also upon its inner upper surface limited by the surface 12, with a layer 15 which is a reaction product of 56 percent M 0 and 44 percent TiO it is applied according to one of the above-described methods and is 20 p. thick.
  • rays are produced by applying high voltage between the cathode 3 and the anode 7.
  • the heating voltage of the glow cathodes located in the screen 3' of the cathode 3, is put on between the line 5 and one of the lines 4, 6.
  • the focal point paths l2, 13 located upon the upper surface of the plate 9 can be struck separately or jointly by electrons in order to send out X-rays.
  • the paths l2 and 13 differ from each other only in that the path 12 is lowered by l0 relatively to the vertical line of the plate axle 11, while in the path 13 this angle amounts to l5".
  • the application of the black coating 15 accelerates the ray emission and the heating, so that the cooling time period is shortened.
  • the cooling time period of l500to 1000C is already reduced to less than one half even when the coating is applied only to the bottom side of the plate.
  • An anode for an X-ray tube having a zone available for electron bombardment and, distinct from said zone, an external layer of black material comprising the reaction product obtained by heating a mixture containing not less than 20 percent of titanium dioxide and at least one of the refractory oxides, aluminum oxide and calcium oxide.

Landscapes

  • Coating By Spraying Or Casting (AREA)
  • Particle Accelerators (AREA)
  • X-Ray Techniques (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
US323639A 1972-01-17 1973-01-15 X-ray tube anode Expired - Lifetime US3919124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2201979A DE2201979C3 (de) 1972-01-17 1972-01-17 Verfahren zur Herstellung einer geschwärzten Schicht auf Drehanoden von Röntgenröhren

Publications (1)

Publication Number Publication Date
US3919124A true US3919124A (en) 1975-11-11

Family

ID=5833167

Family Applications (1)

Application Number Title Priority Date Filing Date
US323639A Expired - Lifetime US3919124A (en) 1972-01-17 1973-01-15 X-ray tube anode

Country Status (7)

Country Link
US (1) US3919124A (ru)
JP (1) JPS5615110B2 (ru)
AT (1) AT332492B (ru)
CH (1) CH548667A (ru)
DE (1) DE2201979C3 (ru)
FR (1) FR2168327B1 (ru)
GB (1) GB1418532A (ru)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029828A (en) * 1975-06-23 1977-06-14 Schwarzkopf Development Corporation X-ray target
US4052530A (en) * 1976-08-09 1977-10-04 Materials Technology Corporation Co-deposited coating of aluminum oxide and titanium oxide and method of making same
US4090103A (en) * 1975-03-19 1978-05-16 Schwarzkopf Development Corporation X-ray target
FR2381834A1 (fr) * 1977-02-16 1978-09-22 Gen Electric Anode perfectionnee pour tube a rayons x
US4327305A (en) * 1978-11-20 1982-04-27 The Machlett Laboratories, Inc. Rotatable X-ray target having off-focal track coating
US4516255A (en) * 1982-02-18 1985-05-07 Schwarzkopf Development Corporation Rotating anode for X-ray tubes
FR2569050A1 (fr) * 1984-08-07 1986-02-14 Boyarina Maiya Anode tournante pour tube a rayons x et tube a rayons x equipe d'une telle anode
FR2574988A1 (fr) * 1984-12-13 1986-06-20 Comurhex Anode tournante pour tube a rayons x
EP0244776A2 (en) * 1986-05-09 1987-11-11 General Electric Company Emissive coating for X-ray target
US4870672A (en) * 1987-08-26 1989-09-26 General Electric Company Thermal emittance coating for x-ray tube target
US4953190A (en) * 1989-06-29 1990-08-28 General Electric Company Thermal emissive coating for x-ray targets
US5199059A (en) * 1990-11-22 1993-03-30 Schwarzkopf Technologies Corporation X-ray tube anode with oxide coating
US5461659A (en) * 1994-03-18 1995-10-24 General Electric Company Emissive coating for x-ray tube rotors
US5553114A (en) * 1994-04-04 1996-09-03 General Electric Company Emissive coating for X-ray tube rotors

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1142211A (en) * 1978-11-20 1983-03-01 Richard G. Weber Rotatable x-ray target having off-focal track coating
JPS57158937A (en) * 1981-03-26 1982-09-30 Tokyo Tungsten Co Ltd Rotary anode target for x-ray tube
JPS58128644A (ja) * 1982-01-27 1983-08-01 Hitachi Ltd Ｘ線管用タ−ゲツト
AT394643B (de) * 1989-10-02 1992-05-25 Plansee Metallwerk Roentgenroehrenanode mit oxidbeschichtung
DE19914825A1 (de) * 1999-03-31 2000-06-29 Siemens Ag Vakuumgehäuse für eine Elektronenröhre
JP4295527B2 (ja) * 2003-02-27 2009-07-15 株式会社アライドマテリアル 放電ランプ及びその電極構造

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336271A (en) * 1941-12-23 1943-12-07 Machlett Lab Inc Rotary anode x-ray tube
US2863083A (en) * 1956-03-30 1958-12-02 Radiologie Cie Gle X-ray genenrator tubes
US3037142A (en) * 1956-03-15 1962-05-29 Radiologie Cie Gle X-ray generator tubes
US3243636A (en) * 1963-01-30 1966-03-29 Tubix Soc Rotary anode for X-ray tubes
US3310102A (en) * 1962-12-27 1967-03-21 Centre Nat Rech Scient Devices for lowering the temperature of a body by heat radiation therefrom
US3694685A (en) * 1971-06-28 1972-09-26 Gen Electric System for conducting heat from an electrode rotating in a vacuum
US3753021A (en) * 1972-04-03 1973-08-14 Machlett Lab Inc X-ray tube anode target

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336271A (en) * 1941-12-23 1943-12-07 Machlett Lab Inc Rotary anode x-ray tube
US3037142A (en) * 1956-03-15 1962-05-29 Radiologie Cie Gle X-ray generator tubes
US2863083A (en) * 1956-03-30 1958-12-02 Radiologie Cie Gle X-ray genenrator tubes
US3310102A (en) * 1962-12-27 1967-03-21 Centre Nat Rech Scient Devices for lowering the temperature of a body by heat radiation therefrom
US3243636A (en) * 1963-01-30 1966-03-29 Tubix Soc Rotary anode for X-ray tubes
US3694685A (en) * 1971-06-28 1972-09-26 Gen Electric System for conducting heat from an electrode rotating in a vacuum
US3753021A (en) * 1972-04-03 1973-08-14 Machlett Lab Inc X-ray tube anode target

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090103A (en) * 1975-03-19 1978-05-16 Schwarzkopf Development Corporation X-ray target
US4029828A (en) * 1975-06-23 1977-06-14 Schwarzkopf Development Corporation X-ray target
US4052530A (en) * 1976-08-09 1977-10-04 Materials Technology Corporation Co-deposited coating of aluminum oxide and titanium oxide and method of making same
US4112148A (en) * 1976-08-09 1978-09-05 Materials Technology Corporation Method of co-deposit coating aluminum oxide and titanium oxide
FR2381834A1 (fr) * 1977-02-16 1978-09-22 Gen Electric Anode perfectionnee pour tube a rayons x
US4132916A (en) * 1977-02-16 1979-01-02 General Electric Company High thermal emittance coating for X-ray targets
US4327305A (en) * 1978-11-20 1982-04-27 The Machlett Laboratories, Inc. Rotatable X-ray target having off-focal track coating
US4516255A (en) * 1982-02-18 1985-05-07 Schwarzkopf Development Corporation Rotating anode for X-ray tubes
FR2569050A1 (fr) * 1984-08-07 1986-02-14 Boyarina Maiya Anode tournante pour tube a rayons x et tube a rayons x equipe d'une telle anode
FR2574988A1 (fr) * 1984-12-13 1986-06-20 Comurhex Anode tournante pour tube a rayons x
EP0185598A1 (fr) * 1984-12-13 1986-06-25 COMURHEX Société pour la Conversion de l'Uranium en Métal et Hexafluorure Anode tournante pour tube à rayons X
EP0244776A2 (en) * 1986-05-09 1987-11-11 General Electric Company Emissive coating for X-ray target
EP0244776A3 (en) * 1986-05-09 1988-06-01 General Electric Company Emissive coating for x-ray target
US4870672A (en) * 1987-08-26 1989-09-26 General Electric Company Thermal emittance coating for x-ray tube target
US4953190A (en) * 1989-06-29 1990-08-28 General Electric Company Thermal emissive coating for x-ray targets
US5199059A (en) * 1990-11-22 1993-03-30 Schwarzkopf Technologies Corporation X-ray tube anode with oxide coating
US5461659A (en) * 1994-03-18 1995-10-24 General Electric Company Emissive coating for x-ray tube rotors
US5553114A (en) * 1994-04-04 1996-09-03 General Electric Company Emissive coating for X-ray tube rotors

Also Published As

Publication number Publication date
DE2201979A1 (de) 1973-08-02
CH548667A (de) 1974-04-30
GB1418532A (en) 1975-12-24
FR2168327A1 (ru) 1973-08-31
JPS5615110B2 (ru) 1981-04-08
FR2168327B1 (ru) 1976-11-05
DE2201979B2 (de) 1978-08-24
AT332492B (de) 1976-09-27
JPS4883789A (ru) 1973-11-08
DE2201979C3 (de) 1979-05-03
ATA1068272A (de) 1976-01-15

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