CH207136A - Process for the production of vacuum- and high-pressure-tight power entries. - Google Patents
Process for the production of vacuum- and high-pressure-tight power entries.Info
- Publication number
- CH207136A CH207136A CH207136DA CH207136A CH 207136 A CH207136 A CH 207136A CH 207136D A CH207136D A CH 207136DA CH 207136 A CH207136 A CH 207136A
- Authority
- CH
- Switzerland
- Prior art keywords
- pressure
- vacuum
- production
- quartz
- tight power
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 4
- 239000011521 glass Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000010453 quartz Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/32—Sealing leading-in conductors
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Verfahren zur Herstellung von vakuum- und hochdruckdichten Stromeinführungen. Es ist bereits bekannt, Stromeinführun gen in Quarz- oder andere schwer schmelzbare Gläser in der Weise herzustellen, dass man aus schwer schmelzbaren Metallen, deren Schmelzpunkt genügend hoch oberhalb der Erweichungstemperatur der betreffenden Glassorte liegt, wie z.
B. Molybdän, Wolf ram, Niob; Tantal usw. hergestellte Bänder von höchstens 20,u Dicke durch Erhitzung und Zusammenfallenlas,sen des Quarz- oder Hartglases unter Hochvakuum eingeschmol zen hat, wobei die Anwesenheit von freiem Wasserstoff sowohl in der zur Erhitzung dienenden Flamme als auch im Metallband tunlichst zu vermeiden war.
Es wurde sogar vorgeschlagen, die Erhitzung zur völligen Vermeidung von Störungen infolge der Anwesenheit von Wasserstoff im Kohlelicht bogen vorzunehmen.
Es wurde gefunden, dass diese Grenzdicke von 20,c < weit überschritten werden kann und Bänder mit 30,u Dicke und auch mehr bequem und ahne alle Vorsichtsmassregeln bezüglich des Wasserstoffgehaltes der zur Verarbeitung benötigten Wärmequelle verwendet werden können, wenn vakuum- und hochdruckdichte Einführungen mit in Quarz- oder Hartglas eingeschmolzenem Band aus s chwerschmelz- barem Metall verwendet werden,
bei welchem die Einschmelzung unter mechanischem Zusammenquetschen des Fusses erfolgt.
Gegenstand der Erfindung ist ein Ver fahren zur Herstellung von vakuum- und hochdruckdichten Stromeinführungen mit in Quarz- oder Hartglas eing sehmolzenem Band von einer Foliendicke von über 20,u, bei welchem beim Einschmelzen -des Metallbandes im Gefässinnern ein niedrigerer Gasdruck aufrecht erhalten wird, als er ausserhalb des selben besteht.
Die Vorteile des erfindungsgemässen Einsichmelzverfahrens bestehen darin, dass bei gleichem Bandquerschnitt infolge Ver wendbarkeit von Bändern grösserer Dicke eine grössere Handlichkeit und grössere mecha nische Festigkeit erreicht wird, was insbe sondere beim Einschmelzen fertig zusam mengebauter, aus mehreren Teilen bestehen- der Anordnungen, wie z.
B. im Falle von Hochdruckglühlampen oder hei elektrischen Entladungsröhren mit kompliziertem Elek- trodenaufbau von grosser Wichtigkeit ist. Besonders, hervortretend sind die Vorteile der Erfindung, wenn eine aus mehreren Teilen zusammengebaute Anordnung so in einem Quarz- oder Hartglasgefäss unterzubringen ist, dass an mehreren voneinander räumlich getrennten Stellen Stromdurchführungen vorhanden sein müssen.
In diesem Falle ist es oft zweckmässig, ja unerlässlich, so zu ver fahren, dass man die vollständig zusammen gebaute Anordnung im entsprechend geform ten Gefäss unterbringt und dann erst die Stromeinführungen nacheinander verschmilzt, was nur dann zweckentsprechend ausgeführt werden kann, wenn die mechanische Festig keit der ganzen Anordnung bereits vor dem Verschmelzen der Stromeinführungen aus reichend ist.
Weiterhin liegt es auf der Hand, dass be sonders dann, wenn die Stromeinführungen hohe Stromstärken auszuhalten haben, die Verwendung dünner Folien wegen der grossen erforderlichen Bandbreite zu Mängeln führt. Essei noch bemerkt, dass insbesondere bei Verwendung von Gefässen aus Quarzglas als Bandmaterial Molybdän wegen seiner ver hältnismässig leichten Bearbeitbarkeit und seiner grösseren Duktilität in erster Linie in Frage kommt.
Process for the production of vacuum- and high-pressure-tight power entries. It is already known that Stromeinführun conditions in quartz or other difficult-to-melt glasses are produced in such a way that they are made of difficult-to-melt metals whose melting point is sufficiently high above the softening temperature of the glass in question, such as.
B. Molybdenum, Wolf ram, Niobium; Tantalum etc. has melted strips with a maximum thickness of 20 u by heating and collapsing the quartz or hard glass under high vacuum, avoiding the presence of free hydrogen in the flame used for heating as well as in the metal strip.
It has even been proposed to make the heating arc to completely avoid disturbances due to the presence of hydrogen in the carbon light.
It has been found that this limit thickness of 20, c <can be exceeded by far and tapes with a thickness of 30 u and more can be used comfortably and without all precautionary measures with regard to the hydrogen content of the heat source required for processing if vacuum- and high-pressure-tight entries are made tape made of fusible metal melted in quartz or hard glass is used,
in which the melting takes place with mechanical squeezing of the foot.
The invention relates to a process for the production of vacuum- and high-pressure-tight power leads with a sehmolzenem band in quartz or hard glass with a film thickness of over 20, u, in which a lower gas pressure is maintained than when melting the metal band inside the vessel it exists outside of the same.
The advantages of the inventive Einsichmelzververfahren are that with the same band cross-section as a result of Ver usability of bands of greater thickness, greater maneuverability and greater mechanical strength is achieved, which is especially special when melted together, consisting of several parts of arrangements such.
B. in the case of high-pressure incandescent lamps or hot electrical discharge tubes with a complicated electrode structure is of great importance. The advantages of the invention are particularly evident when an arrangement composed of several parts is to be accommodated in a quartz or hard glass vessel in such a way that current feedthroughs must be present at several spatially separated locations.
In this case it is often expedient, indeed essential, to proceed in such a way that the fully assembled arrangement is accommodated in the appropriately shaped vessel and only then the current inlets merge one after the other, which can only be carried out appropriately if the mechanical strength is sufficient the whole arrangement is sufficient before the merging of the current inlets.
Furthermore, it is obvious that, particularly when the current inlets have to withstand high currents, the use of thin foils leads to deficiencies because of the large bandwidth required. It should also be noted that particularly when using vessels made of quartz glass as the strip material, molybdenum is primarily an option because of its relatively easy machinability and its greater ductility.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE207136X | 1937-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH207136A true CH207136A (en) | 1939-09-30 |
Family
ID=5793545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH207136D CH207136A (en) | 1937-04-09 | 1938-03-28 | Process for the production of vacuum- and high-pressure-tight power entries. |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH207136A (en) |
| NL (1) | NL48683C (en) |
-
0
- NL NL48683D patent/NL48683C/xx active
-
1938
- 1938-03-28 CH CH207136D patent/CH207136A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL48683C (en) |
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