DE1183250B - Method of providing 20 to 60 micron thick metal strip of iridium with knife-like edges - Google Patents
Method of providing 20 to 60 micron thick metal strip of iridium with knife-like edgesInfo
- Publication number
- DE1183250B DE1183250B DEN19064A DEN0019064A DE1183250B DE 1183250 B DE1183250 B DE 1183250B DE N19064 A DEN19064 A DE N19064A DE N0019064 A DEN0019064 A DE N0019064A DE 1183250 B DE1183250 B DE 1183250B
- Authority
- DE
- Germany
- Prior art keywords
- knife
- iridium
- edges
- providing
- micron thick
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/02—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing by fusing glass directly to metal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Description
Verfahren zum Versehen von 20 bis 60 Mikron dickem Metallband aus Iridium mit messerartigen Kanten Die Erfindung bezieht sich auf ein Verfahren zum Versehen von 20 bis 60 Mikron dicken Bändern aus Iridium mit messerartigen Kanten, insbesondere von Bändern für in Quarzglas einzuschmelzende Stromzuleitungen von elektrischen Quarzlampen.Method for providing 20 to 60 micron thick metal strip of iridium with knife-like edges The invention relates to a method for providing 20 to 60 micron thick strips of iridium with knife-like edges, in particular of strips for current leads of electric quartz lamps to be melted in quartz glass.
Als Stromzuleitungen in Quarzlampen findet vielfach Molybdänband mit einer Dicke von etwa 12 Mikron Verwendung.Molybdenum tape is often used as power supply lines in quartz lamps a thickness of about 12 microns using it.
Für stärkere Ströme kann auch 20 bis 60 Mikron dickes Band Verwendung finden. Eine vakuumdichte Einschmelzung eines Bandes dieser Dicke in Quarz macht es jedoch notwendig, daß das Band mit messerartigen Kanten versehen ist.For stronger currents, 20 to 60 micron thick tape can also be used. A vacuum-tight fusing of a band of this thickness in quartz makes it necessary, however, that the band is provided with knife-like edges.
Bei Molybdänband ist es bekannt, dieses messerartige Profil durch eine Beizbehandlung zu erzielen. Für oxydationsbeständige Einschmelzungen kann es erforderlich sein, Iridium als Einschmelzband zu verwenden. Bisher kam zu diesem Zweck jedoch nur dünnes Band in Frage, weil durch Beizen kein messerartiges Profil erhalten werden konnte.In the case of molybdenum strip, it is known to have this knife-like profile to achieve a pickling treatment. For oxidation-resistant melts it can It may be necessary to use iridium as a sealing tape. So far came to this Purpose, however, only thin tape in question, because pickling does not result in a knife-like profile could be obtained.
Die Erfindung bezweckt, diesem übelstand abzuhelfen.The invention aims to remedy this drawback.
Gemäß der Erfindung wird das Band bei etwa 13001 C einige Minuten lang in Sauerstoff geglüht. Zu diesem Zweck kann das Band in vertikaler Lage zwischen zwei Stromzuführungsgliedem eingeklemmt werden, wobei es von einem Rohr umgeben wird, durch das Sauerstoff in einer Menge von z. B. 5 1 je Minute hindurchgeleitet wird. Die Temperatur des Bandes wird hierbei durch den hindurchgeführten Strom eingestellt und einige Minuten lang auf etwa 13001 C gehalten.According to the invention, the strip is annealed in oxygen at about 13001 C for a few minutes. For this purpose, the tape can be clamped in a vertical position between two power supply members, wherein it is surrounded by a tube through which oxygen in an amount of z. B. 5 1 per minute is passed through. The temperature of the strip is set by the current passed through it and held at about 13001 ° C. for a few minutes.
Das so behandelte Iridiumband hat scharfe Messerkanten, wodurch es sich zum Einschmelzen in Quarzglas eignet.The iridium tape treated in this way has sharp knife edges, which makes it is suitable for melting in quartz glass.
Es sei noch erwähnt, daß die relativ hohe Flüchtigkeit von Iridium in Gegenwart von Sauerstoff bei erhöhter Temperatur an sich bereits bekannt ist. Es war aber nicht zu erwarten, daß ein dünnes Iridiumband beim Glühen in Sauerstoff an seinen Seitenkanten infolge Verflüchtigung ein messerartiges Profil erhalten würde; vielmehr mußte damit gerechnet werden, daß das Material brüchig und spröde wird und somit keine scharfen Kanten aufweisen konnte.It should also be mentioned that the relatively high volatility of iridium in the presence of oxygen at elevated temperature is already known per se. However, it was not to be expected that a thin ribbon of iridium would appear when glowing in oxygen obtained a knife-like profile on its side edges as a result of volatilization would; rather, it was to be expected that the material would be brittle and brittle and therefore could not have any sharp edges.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1183250X | 1959-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1183250B true DE1183250B (en) | 1964-12-10 |
Family
ID=19871176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEN19064A Pending DE1183250B (en) | 1959-10-24 | 1960-10-20 | Method of providing 20 to 60 micron thick metal strip of iridium with knife-like edges |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1183250B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004024517A1 (en) * | 2004-05-18 | 2005-12-15 | Adam Opel Ag | An oil sump assembly |
-
1960
- 1960-10-20 DE DEN19064A patent/DE1183250B/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004024517A1 (en) * | 2004-05-18 | 2005-12-15 | Adam Opel Ag | An oil sump assembly |
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