Heat-resistant member
US-2022073430-A1 · Mar 10, 2022 · US
Heat-resistant member
US12497301B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12497301-B2 |
| Application number | US-202017791417-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 8, 2020 |
| Priority date | Jan 10, 2020 |
| Publication date | Dec 16, 2025 |
| Grant date | Dec 16, 2025 |
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Abstract
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A heat-resistant member ( 1 ) according to the present disclosure contains alumina as a main component, and magnesium aluminate and boron. The content percentage of the magnesium aluminate at the surface is higher than the content percentage of the magnesium aluminate in a surface layer section located directly below the surface.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A heat-resistant member comprising: alumina as a main component; magnesium aluminate; and boron, wherein a content percentage of the magnesium aluminate at a surface is higher than a content percentage of the magnesium aluminate in a surface layer section located directly below the surface. 2 . The heat-resistant member according to claim 1 , wherein the content percentage of the magnesium aluminate in the surface layer section is higher than a content percentage of the magnesium aluminate at an inner portion deeper than the surface layer section in a depth direction from the surface. 3 . The heat-resistant member according to claim 1 , further comprising anorthite. 4 . The heat-resistant member according to claim 3 , wherein a content percentage of the anorthite at the surface of the heat-resistant member is higher than the content percentage of the anorthite at the surface layer section. 5 . The heat-resistant member according to claim 1 , wherein an average equivalent circle diameter of the magnesium aluminate in the surface layer section is larger than an average equivalent circle diameter of the magnesium aluminate at the inner portion. 6 . The heat-resistant member according to claim 1 , wherein a distance between centers of gravity of the magnesium aluminate in the surface layer section is greater than a distance between centers of gravity of the magnesium aluminate in the inner portion. 7 . The heat-resistant member according to claim 1 , wherein the magnesium aluminate is spinel (MgAl 2 O 4 ). 8 . A heat-resistant member comprising: alumina as a main component; magnesium aluminate; and boron, wherein a content percentage of the magnesium aluminate in a surface layer section including a surface is higher than a content percentage of the magnesium aluminate at an inner portion deeper than the surface layer section in a depth direction from the surface. 9 . The heat-resistant member according to claim 8 , wherein a content of the magnesium aluminate at the surface of the heat-resistant member is higher than a content of the magnesium aluminate in the surface layer section. 10 . The heat-resistant member according to claim 8 , wherein a content of boron in terms of B2O3 in the surface layer section is less than the content of boron in the inner portion. 11 . The heat-resistant member according to claim 8 , wherein a content percentage of the anorthite in the surface layer section is higher than a content percentage of the anorthite at the inner portion. 12 . The heat-resistant member according to claim 11 , wherein a content percentage of the anorthite at the surface of the heat-resistant member is higher than the content percentage of the anorthite at the surface layer section. 13 . The heat-resistant member according to claim 8 , wherein an average equivalent circle diameter of the magnesium aluminate in the surface layer section is larger than an average equivalent circle diameter of the magnesium aluminate at the inner portion. 14 . The heat-resistant member according to claim 8 , wherein a distance between centers of gravity of the magnesium aluminate in the surface layer section is greater than a distance between centers of gravity of the magnesium aluminate in the inner portion. 15 . The heat-resistant member according to claim 8 , wherein the magnesium aluminate is spinel (MgAl 2 O 4 ).
Assignees
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Classifications
Compositional purity · CPC title
Stability against thermal decomposition · CPC title
spinel-type (AB2O4) · CPC title
rich in aluminium oxide · CPC title
Thermal properties, e.g. thermal expansion coefficient · CPC title
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- What does patent US12497301B2 cover?
- A heat-resistant member ( 1 ) according to the present disclosure contains alumina as a main component, and magnesium aluminate and boron. The content percentage of the magnesium aluminate at the surface is higher than the content percentage of the magnesium aluminate in a surface layer section located directly below the surface.
- Who is the assignee on this patent?
- Kyocera Corp
- What technology area does this patent fall under?
- Primary CPC classification C01F7/162. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 16 2025 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).