US5157706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube anode with oxide coating
Assignee: Schwarzkopf Technologies Corp
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Filing: 1991-11-21
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Granted: 1992-10-20
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Expires: 2011-11-21
Abstract
Abstract An X-ray anode, in particular a rotary anode, having a parent body made of a carbon-containing refractory material. To improve the thermal radiation characteristics of the anode, the anode is provided with an oxidic top layer outside the focal spot or the focal track regions which contains a homogeneously fused phase. A two-ply interlayer arrangement, containing a first-ply of molybdenum and/or tungsten, and a second oxidic ply of Al 2 O 3 , containing 1-30% by weight of TiO 2 , is arranged between the parent body and the oxidic top layer. As a result of this interlayer structure, the fusion of the oxidic top layer so as to form a homogeneous phase becomes possible without problems. In addition, the ageing resistance of the thermal emission coefficient ("ε") is substantially improved.
Inventors
- 👤 Wolfgang Hohenauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:47
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/105
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
120 words
An X-ray anode, in particular a rotary anode, of high thermal emissivity, said anode having a carbon-containing parent body made of a refractory material and a focal spot region or focal track region made of a refractory metal or its alloys, said anode having an oxidic top layer at least on parts of the anode surface outside the focal track, said oxidic top layer containing a homogeneous fused phase, wherein a two-ply interlayer arrangement is arranged between said parent body and said oxidic top layer, said two-ply interlayer arrangement comprising, starting from said parent body, a first ply of molybdenum and/or tungsten and a second oxidic ply of Al 2 O 3 containing 1-30% by weight of TiO 2 .
Claim 2
Dependent Claim
120 words
An X-ray anode, in particular a rotary anode, of high thermal emissivity, said anode having a carbon-containing parent body made of a refractory material and a focal spot region or focal track region made of a refractory metal or its alloys, said anode having an oxidic top layer at least on parts of the anode surface outside the focal track, said oxidic top layer containing a homogeneous fused phase, wherein a two-ply interlayer arrangement is arranged between said parent body and said oxidic top layer, said two-ply interlayer arrangement comprising, starting from said parent body, a first ply of molybdenum and/or tungsten and a second oxidic ply of Al 2 O 3 containing 1-30% by weight of TiO 2 .
Claim 3
Dependent Claim
30 words
The X-ray anode as claimed in claim 1, wherein said oxidic ply of said interlayer arrangement comprises Al 2 O 3 containing between 5-20% by weight of TiO 2 .
Claim 4
Dependent Claim
19 words
The X-ray anode as claimed in claim 1, wherein said interlayer arrangement is between 10 and 100 μm thick.
Claim 5
Dependent Claim
19 words
The X-ray anode as claimed in claim 2, wherein said interlayer arrangement is between 10 and 100 μm thick.
Claim 6
Dependent Claim
41 words
The X-ray anode as claimed in claim 1, wherein said oxidic top layer comprises a mixture of ZrO 2 , TiO 2 and Al 2 O 3 , optionally with stabilizing oxides such as CaO and/or Y 2 O 3 .
Claim 7
Dependent Claim
41 words
The X-ray anode as claimed in claim 2, wherein said oxidic top layer comprises a mixture of ZrO 2 , TiO 2 and Al 2 O 3 , optionally with stabilizing oxides such as CAO and/or Y 2 O 3 .
Claim 8
Dependent Claim
41 words
The X-ray anode as claimed in claim 3, wherein said oxidic top layer comprises a mixture of ZrO 2 , TiO 2 and Al 2 O 3 , optionally with stabilizing oxides such as CaO and/or Y 2 O 3 .
Claim 9
Dependent Claim
41 words
The X-ray anode as claimed in claim 4, wherein said oxidic top layer comprises a mixture of ZrO 2 , TiO 2 and Al 2 O 3 , optionally with stabilizing oxides such as CaO and/or Y 2 O 3 .
Claim 10
Dependent Claim
39 words
The X-ray anode as claimed in claim 1, wherein said oxidic top layer comprises a mixture of TiO 2 , ZrO 2 and SiO 2 , optionally with stabilizing oxides such as CaO and/or Y 2 O 3 .
Claim 11
Dependent Claim
39 words
The X-ray anode as claimed in claim 2, wherein said oxidic top layer comprises a mixture of TiO 2 , ZrO 2 and SiO 2 , optionally with stabilizing oxides such as CaO and/or Y 2 O 3 .
Claim 12
Dependent Claim
39 words
The X-ray anode as claimed in claim 3, wherein said oxidic top layer comprises a mixture of TiO 2 , ZrO 2 and SiO 2 , optionally with stabilizing oxides such as CaO and/or Y 2 O 3 .
Claim 13
Dependent Claim
39 words
The X-ray anode as claimed in claim 4, wherein said oxidic top layer comprises a mixture of TiO 2 , ZrO 2 and SiO 2 , optionally with stabilizing oxides such as CaO and/or Y 2 O 3 .
Claim 14
Dependent Claim
16 words
The X-ray anode as claimed in claim 1, wherein said parent body is composed of TZM.
Claim 15
Dependent Claim
16 words
The X-ray anode as claimed in claim 2, wherein said parent body is composed of TZM.
Claim 16
Dependent Claim
16 words
The X-ray anode as claimed in claim 3, wherein said parent body is composed of TZM.
Claim 17
Dependent Claim
16 words
The X-ray anode as claimed in claim 4, wherein said parent body is composed of TZM.
Claim 18
Dependent Claim
16 words
The X-ray anode as claimed in claim 5, wherein said parent body is composed of TZM.
Claim 19
Dependent Claim
16 words
The X-ray anode as claimed in claim 6, wherein said parent body is composed of TZM.
Claim 20
Dependent Claim
16 words
The X-ray anode as claimed in claim 7, wherein said parent body is composed of TZM.
Claim 21
Dependent Claim
16 words
The X-ray anode as claimed in claim 8, wherein said parent body is composed of TZM.
Claim 22
Dependent Claim
16 words
The X-ray anode as claimed in claim 9, wherein said parent body is composed of TZM.
Claim 23
Dependent Claim
16 words
The X-ray anode as claimed in claim 10, wherein said parent body is composed of TZM.
Claim 24
Dependent Claim
16 words
The X-ray anode as claimed in claim 11, wherein said parent body is composed of TZM.
Claim 25
Dependent Claim
16 words
The X-ray anode as claimed in claim 12, wherein said parent body is composed of TZM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |