DE563003C - Sealing material for evacuated vessels such as electric lamps, rectifiers and similar products - Google Patents
Sealing material for evacuated vessels such as electric lamps, rectifiers and similar productsInfo
- Publication number
- DE563003C DE563003C DER83606D DER0083606D DE563003C DE 563003 C DE563003 C DE 563003C DE R83606 D DER83606 D DE R83606D DE R0083606 D DER0083606 D DE R0083606D DE 563003 C DE563003 C DE 563003C
- Authority
- DE
- Germany
- Prior art keywords
- rectifiers
- sealing material
- similar products
- electric lamps
- evacuated vessels
- 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
-
- 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
Description
Einschmelzmaterial für luftleere Gefäße, wie beispielsweise elektrische Lampen, Gleichrichter und ähnliche Erzeugnisse Um eine dauernde luftdichte Einschmelzung zwischen Glas und Metall herzustellen, ist es bekanntlich erforderlich, entweder ein Metall mit nahezu dem gleichen Ausdehnungskoeffizienten wie dem des betreffenden Glases zu verwenden oder das Metall so dünnwandig und federnd zu machen, daß es mechanisch den Bewegungen des Glases folgen kann.Melting material for evacuated vessels, such as electrical ones Lamps, rectifiers and similar products To ensure a permanent airtight seal to establish between glass and metal, it is known to require either a metal with almost the same coefficient of expansion as the one in question To use glass or to make the metal so thin-walled and resilient that it can mechanically follow the movements of the glass.
Die Erfindung bezieht sich nun auf die Einschmelzung von Metallkörpern, vorzugsweise von Drähten, in Glas mit sehr niedrigen Ausdehnungskoeffizienten von weniger als 5 X io -s. Für solche Gläser würden bis heute als Einschmelzungsmetalle Wolfram oder Molybdän verwendet. Diese Metalle haben jedoch eine große Affinität zum Sauerstoff, der bei dem Einschmelzungsvorgang, vornehmlich dann, wenn ies sich um große Querschnitte handelt, ein Oxyd des Metalls bildet, das als Schicht zwischen Metall und Glas liegt und so zu Undichtigkeiten Anlaß gibt. Man hat nun versucht, diesen Übelstand, dadurch zu beseitigen, daß man den Draht vor dem Einschmelzen mit- einer Schutzschicht z. B. mit Borax, überzog, ohne 4emit jedoch restlos luftdichte Einschmelzungen größerer Querschnitte zu erhalten.The invention now relates to the melting of metal bodies, preferably of wires, in glass with a very low coefficient of expansion of less than 5 X io -s. To this day, such glasses would be used as sealing metals Tungsten or Molybdenum is used. However, these metals have a great affinity to oxygen, which occurs during the melting process, primarily when it is large cross-sections are involved, forming an oxide of the metal that acts as a layer between Metal and glass are lying and so give rise to leaks. One has now tried This problem can be eliminated by removing the wire before melting it down with a protective layer z. B. with borax, coated without 4emit but completely airtight To obtain melts of larger cross-sections.
Erfindungsgemäß wird nun für eine solche Einschmelzung als Metall Rhenium verwendet, welches gegen ,Sauerstoff viel beständiger als Wolfram oder Molybdän ist. Da dieses Metall auch sonst den Erfordernissen eines guten Einschmelzungsdrahts entspricht, insbesondere sich gut mit Glas benetzt und einen Ausdehnungskoeffizienten von weniger als 5-X io-' aufweist, so können damit Einschmelzungen in Gläser mit einem Ausdehnungskoeffizienten von weniger als 5 X i ö "- s leicht und luftdicht hergestellt werden; ohne daß besondere Vorsichtsmaßnahmen angewendet werden müßten.According to the invention is now used as a metal for such a melt Rhenium is used, which is much more resistant to oxygen than tungsten or molybdenum is. Since this metal also otherwise meets the requirements of a good sealing wire corresponds, in particular, is well wetted with glass and has a coefficient of expansion of less than 5-X io- ', so can thus be melted in glasses with a coefficient of expansion of less than 5 x i ö "- s light and airtight getting produced; without special precautionary measures having to be applied.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER83606D DE563003C (en) | 1931-12-16 | 1931-12-16 | Sealing material for evacuated vessels such as electric lamps, rectifiers and similar products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER83606D DE563003C (en) | 1931-12-16 | 1931-12-16 | Sealing material for evacuated vessels such as electric lamps, rectifiers and similar products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE563003C true DE563003C (en) | 1932-10-31 |
Family
ID=7416965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DER83606D Expired DE563003C (en) | 1931-12-16 | 1931-12-16 | Sealing material for evacuated vessels such as electric lamps, rectifiers and similar products |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE563003C (en) |
-
1931
- 1931-12-16 DE DER83606D patent/DE563003C/en not_active Expired
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