Electrical steel sheet and method for manufacturing same
US-12163066-B2 · Dec 10, 2024 · US
Grain-oriented electrical steel sheet, method for manufacturing grain-oriented electrical steel sheet, and annealing separator utilized for manufacture of grain-oriented electrical steel sheet
US2025019788A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025019788-A1 |
| Application number | US-202418897469-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 26, 2024 |
| Priority date | Jan 8, 2019 |
| Publication date | Jan 16, 2025 |
| Grant date | — |
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Abstract
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An annealing separator used for manufacture of the grain-oriented electrical steel sheet according to the present invention contains MgO, at least one or more types of compounds of metal selected from a group comprised of Y, La, and Ce, and at least one or more types of compounds of metal selected from a group comprised of Ti, Zr, and Hf, wherein when a content of the MgO in the annealing separator is defined as 100% by mass %, a total content of the compounds of metal selected from a group comprised of Y, La, and Ce converted to oxides is 0.5 to 8.0%, a total content of the compounds of metal selected from a group comprised of Ti, Zr, and Hf converted to oxides is 0.5 to 10.0%, further, a total of a total content of the compounds of metal selected from a group comprised of Y, La, and Ce converted to oxides and a total content of the compounds of metal selected from a group comprised of Ti, Zr, and Hf converted to oxides is 2.0 to 14.0%, further a ratio of a sum of the numbers of Y, La, and Ce atoms with respect to a sum of the numbers of Ti, Zr, and Hf atoms contained in the annealing separator is 0.15 to 4.00, further a number density of particles of the compounds of metal selected from the group comprised of Y, La, and Ce which are particles of a spherical equivalent diameter based on volume of 0.1 μm or more is 2,000,000,000/g or more, and further a number density of particles of the compounds of metal selected from the group comprised of Ti, Zr, and Hf which are particles of a spherical equivalent diameter based on volume of 0.1 μm or more is 2,000,000,000/g or more.
First claim
Opening claim text (preview).
1 . An annealing separator used for manufacture of grain-oriented electrical steel sheet, the annealing separator containing MgO, at least one or more types of compounds of metal selected from a group comprised of Y, La, and Ce, and at least one or more types of compounds of metal selected from a group comprised of Ti, Zr, and Hf, when a content of the MgO in the annealing separator is defined as 100% by mass %, a total content of the compounds of metal selected from a group comprised of Y, La, and Ce converted to oxides is 0.5 to 8.0% and a total content of the compounds of metal selected from a group comprised of Ti, Zr, and Hf converted to oxides is 0.5 to 10.0%, further, a total of a total content of the compounds of metal selected from a group comprised of Y, La, and Ce converted to oxides and a total content of the compounds of metal selected from a group comprised of Ti, Zr, and Hf converted to oxides is 2.0 to 14.0%, further a ratio of a sum of the numbers of Y, La, and Ce atoms with respect to a sum of the numbers of Ti, Zr, and Hf atoms contained in the annealing separator is 0.15 to 4.00, further a number density of particles of the compounds of metal selected from the group comprised of Y, La, and Ce which are particles of a spherical equivalent diameter based on volume of 0.1 μm or more is 2,000,000,000/g or more, and further a number density of particles of the compounds of metal selected from the group comprised of Ti, Zr, and Hf which are particles of a spherical equivalent diameter based on volume of 0.1 μm or more is 2,000,000,000/g or more. 2 . The annealing separator according to claim 1 , in which annealing separator the annealing separator further contains at least one or more types of a compound of metal selected from the group comprised of Ca, Sr, and Ba, and a ratio of a sum of the numbers of Ca, Sr, and Ba atoms with respect to the number of Mg atoms contained in the annealing separator is less than 0.025.
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only coatings of inorganic non-metallic material · CPC title
containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur · CPC title
containing aluminium · CPC title
containing manganese · CPC title
- C22C38/02Primary
containing silicon · CPC title
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- What does patent US2025019788A1 cover?
- An annealing separator used for manufacture of the grain-oriented electrical steel sheet according to the present invention contains MgO, at least one or more types of compounds of metal selected from a group comprised of Y, La, and Ce, and at least one or more types of compounds of metal selected from a group comprised of Ti, Zr, and Hf, wherein when a content of the MgO in the annealing separ…
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C22C38/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jan 16 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).