DE826360C - Process for the production of sintered bodies for galvanic primary and secondary elements - Google Patents
Process for the production of sintered bodies for galvanic primary and secondary elementsInfo
- Publication number
- DE826360C DE826360C DEH3104A DEH0003104A DE826360C DE 826360 C DE826360 C DE 826360C DE H3104 A DEH3104 A DE H3104A DE H0003104 A DEH0003104 A DE H0003104A DE 826360 C DE826360 C DE 826360C
- Authority
- DE
- Germany
- Prior art keywords
- production
- sintered bodies
- secondary elements
- galvanic primary
- copper
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010000060 Abdominal distension Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 208000024330 bloating Diseases 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Description
Verfahren zur Herstellung von Sinterkörpern für galvanische Primär-und Sekundärelemente Sinterelektroden aus hochvoluminösem Kupferpulver zeigen nach dem Sintern mit Schutzgas Rißbildungen oder sonstige Mängel in der Bindung. Es hat sich gezeigt, daß die Ursache dieser Schäden auf einen mehr oder weniger vorhandenen geringen Oxydulgehalt (Cu z0) des Kupfers zurückzuführen ist.Process for the production of sintered bodies for galvanic primary and Secondary elements show sintered electrodes made of high-volume copper powder Sintering with protective gas, cracking or other defects in the bond. It has shown that the cause of this damage is more or less existing low oxide content (Cu z0) of the copper is due.
Während des Glühens in wasserstoffhaltiger Atmosphäre diffundiert der Wasserstoff in das Sintergut (Cu) und wird mit dem Sauerstoff des Oxyduls erst zu Wasser umgesetzt. Da der sich weiter bildende Wasserdampf keine Diffusionsfähigkeit hat, sondern expandiert, sprengt er bei der Wärme den gepreßten Körper, wobei jedoch diese Sprengungen nicht sofort sichtbar in Erscheinung zu treten brauchen.Diffuses during annealing in a hydrogen-containing atmosphere the hydrogen in the sintered material (Cu) and is only with the oxygen of the oxide converted to water. Since the water vapor that continues to form has no diffusivity has, but expands, it bursts the pressed body when exposed to heat, whereby however these explosions need not be immediately visible.
Wie bekannt, wird zum Zwecke einer möglichst großen Kapazität das Porenvolumen des Sinterkörpers hoch gewählt, was die Festigkeit des Gefüges ohnehin mindert. Bei weiterer Behandlung, wie z. B. einer Aktivierung, führen die zur Aufblähung neigenden Eigenschaften der Metallhydroxyde dann dazu, daß diese Schäden durch Blasenbildung, Abblättern usw. sichtbar in Erscheinung treten.As is known, for the purpose of the largest possible capacity, the The pore volume of the sintered body is chosen to be high, which is what the strength of the structure anyway diminishes. For further treatment, such as B. activation, lead to bloating the tendency of the metal hydroxides to cause damage through blistering, Flaking etc. appear visibly.
Erfindungsgemäß wurde nun ein Mittel gefunden, bei der Herstellung von Sinterelektroden aus Kupferpulver die genannten Schwierigkeiten zu vermeiden. Durch Versuche wurde nämlich festgestellt, daß Kupferpulver, dem ein Desoxydationsmittel, z. B. ein geringfügiger Phosphorgehalt beigefügt ist, bewirkt, daß das Kupfer gegen reduzierende Atmosphäre unempfindlich ist.According to the invention, a means has now been found in the production of sintered electrodes made of copper powder to avoid the difficulties mentioned. Experiments have shown that copper powder, which is a deoxidizer, z. B. a slight phosphorus content is added, causes the copper against reducing atmosphere is insensitive.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH3104A DE826360C (en) | 1950-05-26 | 1950-05-26 | Process for the production of sintered bodies for galvanic primary and secondary elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH3104A DE826360C (en) | 1950-05-26 | 1950-05-26 | Process for the production of sintered bodies for galvanic primary and secondary elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE826360C true DE826360C (en) | 1952-01-03 |
Family
ID=7143429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEH3104A Expired DE826360C (en) | 1950-05-26 | 1950-05-26 | Process for the production of sintered bodies for galvanic primary and secondary elements |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE826360C (en) |
-
1950
- 1950-05-26 DE DEH3104A patent/DE826360C/en not_active Expired
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