GB704092A - Improvements in the method of manufacture of iron-tin permanent magnets - Google Patents
Improvements in the method of manufacture of iron-tin permanent magnetsInfo
- Publication number
- GB704092A GB704092A GB10730/51A GB1073051A GB704092A GB 704092 A GB704092 A GB 704092A GB 10730/51 A GB10730/51 A GB 10730/51A GB 1073051 A GB1073051 A GB 1073051A GB 704092 A GB704092 A GB 704092A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tin
- iron
- manufacture
- permanent magnets
- per cent
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Hard Magnetic Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
In a method of manufacture of iron-tin permanent magnets, to an aqueous solution of a ferrous and a stannous salt is added an alkaline carbonate or bicarbonate or a mixture of both and the precipitated mixture of iron and tin carbonates is separated and decomposed into oxides at a temperature below 450 DEG C. and then reduced, preferably with hydrogen, at a temperature below 450 DEG C, the metallic powder then being agglomerated at a temperature not exceeding 500 DEG C. The final powder contains less than 20 per cent., preferably from 4 to 8 per cent. of tin.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR863502X | 1950-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB704092A true GB704092A (en) | 1954-02-17 |
Family
ID=9343263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10730/51A Expired GB704092A (en) | 1950-06-26 | 1951-05-07 | Improvements in the method of manufacture of iron-tin permanent magnets |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE502770A (en) |
| CH (1) | CH291921A (en) |
| DE (1) | DE863502C (en) |
| FR (1) | FR1020800A (en) |
| GB (1) | GB704092A (en) |
| NL (1) | NL79302C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2923684A (en) * | 1957-06-19 | 1960-02-02 | Du Pont | Tin modified ferromagnetic chromium oxide, its preparation and use in recording members |
-
0
- BE BE502770D patent/BE502770A/xx unknown
- NL NL79302D patent/NL79302C/xx active
-
1950
- 1950-06-26 FR FR1020800D patent/FR1020800A/en not_active Expired
-
1951
- 1951-04-23 CH CH291921D patent/CH291921A/en unknown
- 1951-05-01 DE DES22973A patent/DE863502C/en not_active Expired
- 1951-05-07 GB GB10730/51A patent/GB704092A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE863502C (en) | 1953-01-19 |
| NL79302C (en) | |
| CH291921A (en) | 1953-07-15 |
| FR1020800A (en) | 1953-02-10 |
| BE502770A (en) |
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