GB751045A - Improvements in the production of low density metal powders - Google Patents
Improvements in the production of low density metal powdersInfo
- Publication number
- GB751045A GB751045A GB11760/54A GB1176054A GB751045A GB 751045 A GB751045 A GB 751045A GB 11760/54 A GB11760/54 A GB 11760/54A GB 1176054 A GB1176054 A GB 1176054A GB 751045 A GB751045 A GB 751045A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbonyl
- temperature
- powder
- low density
- free space
- 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)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Low density metal powder, e.g. having a bulk density of less than 0,9 Kg per litre, is produced by the thermal decomposition of metal carbonyls in the free space of a heated vessel by keeping the temperature of the wall of the vessel, particularly at the point of entry of the carbonyl, at least 270 DEG C. higher than the temperature at the middle of the free space. The temperature difference may be achieved by (a) increasing the rate of carbonyl feed, (b) increasing the supply of heat to the walls or (c) the supply of cold gases or vapours. To produce very low density powders, the temperature at the middle of the free space is kept below 300 DEG C., e.g. at 230 DEG C., by supplying carbonyl to the decomposition chamber in such an amount that the effluent carbon monoxide contains undecomposed carbonyl which has, however, a partial pressure considerably below the saturation pressure of the carbonyl at room temperature. An example of the production of Ni powder is given. Ni powder and Fe-Ni powder produced by the process may be used for the manufacture of electrode frameworks, for alkaline accumulators and for porous plates and tubes. Specification 679,439 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE751045X | 1953-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB751045A true GB751045A (en) | 1956-06-27 |
Family
ID=6651290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11760/54A Expired GB751045A (en) | 1953-04-24 | 1954-04-23 | Improvements in the production of low density metal powders |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB751045A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2900245A (en) * | 1957-01-24 | 1959-08-18 | Gen Aniline & Film Corp | Production of finely divided metals |
-
1954
- 1954-04-23 GB GB11760/54A patent/GB751045A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2900245A (en) * | 1957-01-24 | 1959-08-18 | Gen Aniline & Film Corp | Production of finely divided metals |
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