GB773603A - Improvements relating to iron powder and magnetic cores made therefrom - Google Patents
Improvements relating to iron powder and magnetic cores made therefromInfo
- Publication number
- GB773603A GB773603A GB1890754A GB1890754A GB773603A GB 773603 A GB773603 A GB 773603A GB 1890754 A GB1890754 A GB 1890754A GB 1890754 A GB1890754 A GB 1890754A GB 773603 A GB773603 A GB 773603A
- Authority
- GB
- United Kingdom
- Prior art keywords
- decomposer
- temperature
- valves
- carbonyl
- zone
- 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
- B22F9/30—Making metallic powder or suspensions thereof using chemical processes with decomposition of metal compounds, e.g. by pyrolysis
- B22F9/305—Making metallic powder or suspensions thereof using chemical processes with decomposition of metal compounds, e.g. by pyrolysis of metal carbonyls
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
773,603. Carbonyl iron. MOND NICKEL CO., Ltd. June 15, 1955 [June 28, 1954], No. 18907/54. Class 72 . , Iron powder containing nitrogen is produced by decomposing iron carbonyl in the hot free space of a decomposer into the top of which the carbonyl vapour and ammonia with or without a diluent gas are added, the temperature in a zone at the bottom of the decomposer being maintained 50‹C. or more higher than the temperature in the decomposer above the bottom zone. As shown, a heating jacket 2 is divided by a partition 8 forming a lower zone which may be less than one half but more than one quarter of the height of the decomposer and steam may be admitted to both parts through valves 12, 13, and 15, the rate of admission through valve 15 being greater than,that through valves 12 and 13. The particle size is controlled by the temperature in the top part of the decomposer e.g. a temperature of 250-290 ‹C. at one quarter of the distance down giving particles 4.5 to 5 microns diameter and 270- 320‹C. giving particles 3 to 3.5 microns diameter, the bottom temperatures being 370-410‹C. and over 410‹C. respectively. The powder produced is stated to give high Q-valves at high frequencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1890754A GB773603A (en) | 1954-06-28 | 1954-06-28 | Improvements relating to iron powder and magnetic cores made therefrom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1890754A GB773603A (en) | 1954-06-28 | 1954-06-28 | Improvements relating to iron powder and magnetic cores made therefrom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB773603A true GB773603A (en) | 1957-05-01 |
Family
ID=10120474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1890754A Expired GB773603A (en) | 1954-06-28 | 1954-06-28 | Improvements relating to iron powder and magnetic cores made therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB773603A (en) |
-
1954
- 1954-06-28 GB GB1890754A patent/GB773603A/en not_active Expired
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