Lighting device with ceramic garnet
US-10969670-B2 · Apr 6, 2021 · US
Sintering process for electrical feedthroughs
US12162804B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12162804-B2 |
| Application number | US-202117346380-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 14, 2021 |
| Priority date | Jun 25, 2020 |
| Publication date | Dec 10, 2024 |
| Grant date | Dec 10, 2024 |
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- Title
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Abstract
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One aspect relates to a process for producing a sintered workpiece, which includes sintering of a ceramic material at a temperature of at least 1000° C. and in an atmosphere, in the case of which the partial pressure of atmospheric air is reduced to less than 10 −6 -times, based on the ambient air at the same temperature under equilibrium conditions.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing a sintered workpiece, comprising pre-sintering of a ceramic material at a temperature of more than 1000° C. and less than 1600° C. for 1 hour, then further sintering of the ceramic material maximally for 1 hour at a temperature of more than 1600° C. and in an atmosphere, in the case of which the partial pressure of atmospheric air is reduced to less than 10 −6 -times, based on the ambient air at the same temperature under equilibrium conditions, wherein the ceramic material comprises a metal oxide selected from a group consisting of alumina (Al 2 O 3 ), magnesia (MgO), zirconia (ZrO 2 ), aluminum titanate (Al 2 TiO 5 ), and piezoceramics, or a combination thereof, wherein the ceramic material comprises a cermet, wherein the cermet comprises a precious metal, and wherein the precious metal is selected from a group consisting of platinum, silver, gold, tantalum, molybdenum, and titanium. 2. The process according to claim 1 , wherein in the case of which the partial pressure of atmospheric air is reduced to less than 10 −8 -times, based on the ambient air at the same temperature under equilibrium conditions. 3. The process according to claim 1 , wherein the atmosphere during the sintering has a total pressure of less than 100 Pa. 4. The process according to claim 1 , wherein the atmosphere during the sintering has a total pressure of less than 0.001 Pa. 5. The process according to claim 1 , wherein the atmosphere during the sintering has a partial oxygen pressure of less than 1 Pa. 6. The process according to claim 1 , wherein the atmosphere during the sintering has a partial oxygen pressure of less than 0.001 Pa. 7. The process according to claim 1 , wherein the atmosphere during the sintering has a partial water pressure of less than 1 Pa. 8. The process according to claim 1 , wherein the atmosphere during the sintering has a partial water pressure of less than 0.001 Pa. 9. The process according to claim 1 , wherein the atmosphere comprises a protective gas, selected from a group consisting of argon, nitrogen, helium, or a combination thereof. 10. The process according to claim 1 , wherein the workpiece is configured for installation in an implantable medical product, wherein the medical product is selected from a group consisting of a pulse generator, pacemaker, cardiac resynchronization device, actuator, sensor, and stimulator. 11. The process according to claim 1 , wherein pre-sintering of the ceramic material is at a temperature of more than 1000° C. and less than 1100° C. 12. The process according to claim 1 , wherein pre-sintering of the ceramic material is at ordinary room atmospheric pressure.
Assignees
Inventors
Classifications
Multiple heating or additional steps (B22F3/101 takes precedence) · CPC title
Electrical details of casings, e.g. terminals, passages for cables or wiring · CPC title
Water vapor containing atmospheres · CPC title
Oxygen containing atmosphere, e.g. with changing oxygen pressures · CPC title
Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof · CPC title
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Frequently asked questions
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- What does patent US12162804B2 cover?
- One aspect relates to a process for producing a sintered workpiece, which includes sintering of a ceramic material at a temperature of at least 1000° C. and in an atmosphere, in the case of which the partial pressure of atmospheric air is reduced to less than 10 −6 -times, based on the ambient air at the same temperature under equilibrium conditions.
- Who is the assignee on this patent?
- Heraeus Deutschland Gmbh & Co Kg
- What technology area does this patent fall under?
- Primary CPC classification C04B35/111. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 10 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).