WO2001022464A1 - Support material - Google Patents

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Publication number
WO2001022464A1
WO2001022464A1 PCT/EP2000/009242 EP0009242W WO0122464A1 WO 2001022464 A1 WO2001022464 A1 WO 2001022464A1 EP 0009242 W EP0009242 W EP 0009242W WO 0122464 A1 WO0122464 A1 WO 0122464A1
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WO
WIPO (PCT)
Prior art keywords
support material
mercury
carrier material
temperature
material according
Prior art date
Application number
PCT/EP2000/009242
Other languages
German (de)
French (fr)
Inventor
Ludwig Schuster
Wolfgang Risch
Original Assignee
Sli Lichtsysteme Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sli Lichtsysteme Gmbh filed Critical Sli Lichtsysteme Gmbh
Publication of WO2001022464A1 publication Critical patent/WO2001022464A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
    • H01J7/186—Getter supports

Definitions

  • the invention relates to a carrier material for a device which serves as a mercury source and / or gas absorber (getter) and / or electrode shielding in fluorescent lamps.
  • Mercury is an essential part of the filling of a fluorescent lamp.
  • it is also usual to introduce it in solid form, thus as an alloy or amalgam.
  • the mercury as a component of an intermetallic mixture can either be accommodated in a metallic container or applied to a metal band, which each consist of the carrier material mentioned. The application can be carried out, for example, by rolling on a mixture in powder form.
  • a getter material is preferably also located on the band. either on the same side as the mercury or as the mixture containing mercury (e.g. Hg, Zr, Ti, Su.Cu etc.) or on the side facing away from the mercury.
  • This getter material possibly absorbs impurities occurring in the fluorescent lamp.
  • a metal carrier tape can be used in a wide variety of shapes and dimensions in the lamp, u. a. also as a so-called electrode shield between the electrode and the lamp envelope, in order to avoid contamination or even blackening of the lamp envelope from, for example, metal vapors.
  • the carrier material and mercury are heated to a sufficiently high temperature by means of inductive heating in an alternating electromagnetic field.
  • the heating takes place by means of eddy currents on the one hand and magnetic reversal processes on the other. If the temperature exceeds the Curie temperature of the carrier material, the permeability takes the value 1, i.e. the portion of the heating caused by magnetic reversal losses is eliminated and the effect of the eddy current processes decreases.
  • the Curie temperature is between 700 ° C and 770 ° C or for nickel at 358 ° C.
  • the temperature of the device mentioned at the outset which can be achieved by inductive heating is essentially determined by the carrier material. If the temperature required for the thermal decomposition of the mercury and for triggering a getter process is above the Curie temperature of the carrier material used, a high energy expenditure must be driven after it has been exceeded in order to achieve the required temperature solely through the eddy current processes. In addition to the resulting high electrical energy expenditure for these processes, there is also the expenditure for cooling the system required for inductive heating, which increases with the current intensity. At the same time, the procurement costs of this system, which is required for inductive heating, are also increasing.
  • the object on which the invention is based is therefore seen in reducing the energy expenditure which is required on the one hand for the inductive heating of the device mentioned at the beginning and on the other hand for cooling the system required for inductive heating, and also the acquisition costs for this system to improve the energy efficiency of the entire process.
  • a preferred embodiment of a carrier material according to the invention is a ferromagnetic alloy made of iron, cobalt and vanadium, specifically an alloy Fe x Co v V z , in which x and y are each between 5 and 95 percent by weight and z between 0 and 10 percent by weight of the total weight. Since the mechanical properties of the carrier material, such as elongation, yield strength, tensile strength, hardness etc., assume poorer values with respect to the further machinability with increasing cobalt content of this alloy, smaller amounts of vanadium are added within the range specified in order to counteract this.
  • the induction heating of the device using such a carrier material will result in temperature reaching the required final temperature, i.e. the temperature at which the mercury compound is thermally digested and a getter process can also be carried out if necessary, utilizing both the eddy current and magnetic reversal processes, as long as this final temperature is still below this increased Curie temperature according to the invention.
  • the advantage resulting from the invention is thus that the electrical energy required for inductive heating is high is lowered. This in turn means that the cost of cooling the system required for inductive heating is also drastically reduced. Another advantage is the considerable reduction in the initial cost of the system required for inductive heating, since it can now be designed for lower energy consumption.
  • the respective special alloy of the carrier material according to the invention can be set such that its Curie temperature corresponds to the required minimum end temperature in the respective special manufacturing process of the fluorescent lamps or is slightly above this end temperature.
  • the carrier material Before the mixture containing the mercury is applied, it may be expedient to coat the carrier material on one side or on both sides with a nickel layer.

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  • Discharge Lamp (AREA)

Abstract

A ferromagnetic alloy with a Curie temperature above that of pure iron is used as a support material for a device that serves as a source of mercury and/or a gas absorber (getter) and/or an electrode shield in fluorescent lamps.

Description

TRAGERMATERIAL support material
Die Erfindung betrifft ein Trägermaterial für eine Vorrichtung, die als Quecksilberquelle und/oder Gasabsorber (Getter) und/oder Elektrodenabschirmung in Leuchtstofflampen dient.The invention relates to a carrier material for a device which serves as a mercury source and / or gas absorber (getter) and / or electrode shielding in fluorescent lamps.
Quecksilber ist ein wesentlicher Bestandteil der Füllung einer Leuchtstofflampe. Neben einem Einbringen einer Dosage von flüssigem Quecksilber ist auch ein Einbringen desselben in fester Form üblich, somit als Legierung bzw. Amalgam. Zu diesem Zweck kann das Quecksilber als ein Bestandteil eines intermetallischen Gemisches entweder in einem metallischen Behälter untergebracht oder auf einem Metallband aufgebracht werden, die jeweils aus dem genannten Trägermaterial bestehen. Das Aufbringen kann beispielsweise durch Aufwalzen eines in Pulverform vorliegenden Gemisches erfolgen.Mercury is an essential part of the filling of a fluorescent lamp. In addition to introducing a dose of liquid mercury, it is also usual to introduce it in solid form, thus as an alloy or amalgam. For this purpose, the mercury as a component of an intermetallic mixture can either be accommodated in a metallic container or applied to a metal band, which each consist of the carrier material mentioned. The application can be carried out, for example, by rolling on a mixture in powder form.
Wird ein B and aus einem solchen metallischen Trägermaterial verwendet, befindet sich auf demselben vorzugsweise auch noch ein Gettermaterial. und zwar wahlweise auf derselben Seite wie das Quecksilber bzw. wie das Quecksilber enthaltende Gemisch (z.B . Hg, Zr, Ti, Su. Cu etc. ) oder auf der dem Quecksilber abgewandten Seite desselben. Dieses Gettermaterial absorbiert gegebenenfalls in der Leuchtstofflamp e vorkommende Verunreinigungen. Ein solches Metall-Trägerband kann in vielfältigster Form und Abmessung in der Lampe verwendet werden, u. a. auch als sogenannte Elektrodenabschirmung zwischen Elektrode und Lampenhülle, um von der Elektrode ausgehende Verunreinigungen oder gar eine Schwärzung der Lampenhülle durch beispielsweise Metalldämpfe zu vermeiden.If a band made of such a metallic carrier material is used, a getter material is preferably also located on the band. either on the same side as the mercury or as the mixture containing mercury (e.g. Hg, Zr, Ti, Su.Cu etc.) or on the side facing away from the mercury. This getter material possibly absorbs impurities occurring in the fluorescent lamp. Such a metal carrier tape can be used in a wide variety of shapes and dimensions in the lamp, u. a. also as a so-called electrode shield between the electrode and the lamp envelope, in order to avoid contamination or even blackening of the lamp envelope from, for example, metal vapors.
Um nun die Quecksilberverbindung thermisch aufzuschließen und gegebenenfalls außerdem den Getterprozeß durchzuführen, wird die das Trägermaterial und Quecksilber nebst gegebenenfalls Getter aufweisende Vorrichtung mittels induktiver Erwärmung in einem elektromagnetischen Wechselfeld auf eine hinreichend hohe Temperatur erhitzt.In order to thermally digest the mercury compound and possibly also carry out the getter process, this is the The carrier material and mercury, together with any device which may have getters, are heated to a sufficiently high temperature by means of inductive heating in an alternating electromagnetic field.
Es ist bereits bekannt (WO 97/ 1946 1 und EP 0 69 1 670 A2), als Trägermaterial bzw. Material für ein metallisches Band oder einen metallischen Behälter nickelplattierten Stahl zu verwenden. Ferner ist auch bereits für einen metallischen Behälter Stahl, Nickel oder vernickeltes Eisen bevorzugt worden, wie sich ferner aus der WO 98/53479 ergibt.It is already known (WO 97/1946 1 and EP 0 69 1 670 A2) to use nickel-plated steel as a carrier material or material for a metallic band or a metallic container. Furthermore, steel, nickel or nickel-plated iron has already been preferred for a metallic container, as is also evident from WO 98/53479.
Bei einem ferromagnetischen Trägermaterial für die eingangs genannte Vorrichtung erfolgt die Erwärmung durch einerseits Wirbelströme und andererseits Ummagnetisierungsprozesse. Überschreitet dabei die Temperatur die Curie-Temperatur des Trägermaterials, so nimmt die Permeabilität den Wert 1 an, d.h der Anteil der Erwärmung durch Ummagnetisierungsverluste entfällt und die Wirkung der Wirbelstromprozesse nimmt ab.In the case of a ferromagnetic carrier material for the device mentioned at the outset, the heating takes place by means of eddy currents on the one hand and magnetic reversal processes on the other. If the temperature exceeds the Curie temperature of the carrier material, the permeability takes the value 1, i.e. the portion of the heating caused by magnetic reversal losses is eliminated and the effect of the eddy current processes decreases.
Bei den bisher verwendeten Trägermaterialien Eisen, Stahl und Nickel liegt die Curie-Temperatur zwischen 700°C und 770°C bzw. für Nickel bei 358°C.With the carrier materials iron, steel and nickel used up to now, the Curie temperature is between 700 ° C and 770 ° C or for nickel at 358 ° C.
Die durch induktive Erwärmung erreichbare Temperatur der eingangs genannten Vorrichtung wird im wesentlichen durch das Trägermaterial bestimmt. Liegt die Temperatur, die zur thermischen Aufschließung des Quecksilbers und zur Auslösung eines Getterprozesses erforderlich ist, oberhalb der Curie-Temperatur des verwendeten Trägermaterials, so muß nach Überschreiten derselben ein hoher Energieaufwand getrieben werden, um allein durch die Wirbelstromprozesse die nötige Temperatur zu erreichen. Zu dem sich ergebenden hohen elektrischen Energieaufwand für diese Prozesse kommt noch der Aufwand für die Kühlung des zur induktiven Erwärmung erforderlichen Systems hinzu, der mit der Stromstärke steigt. Gleichzeitig steigen auch die Beschaffungskosten dieses für die induktive Erwärmung benötigten Systems. Die der Erfindung zugrundeliegende Aufgabe wird deshalb darin gesehen, den Energieaufwand, der einerseits für die induktive Erwärmung der eingangs genannten Vorrichtung und andererseits für die Kühlung des für die induktive Erwärmung erforderlichen Systems benötigt wird, sowie auch die Anschaffungskosten für dieses System, zu senken und somit den energetischen Wirkungsgrad des gesamten Verfahrens zu verbessern.The temperature of the device mentioned at the outset which can be achieved by inductive heating is essentially determined by the carrier material. If the temperature required for the thermal decomposition of the mercury and for triggering a getter process is above the Curie temperature of the carrier material used, a high energy expenditure must be driven after it has been exceeded in order to achieve the required temperature solely through the eddy current processes. In addition to the resulting high electrical energy expenditure for these processes, there is also the expenditure for cooling the system required for inductive heating, which increases with the current intensity. At the same time, the procurement costs of this system, which is required for inductive heating, are also increasing. The object on which the invention is based is therefore seen in reducing the energy expenditure which is required on the one hand for the inductive heating of the device mentioned at the beginning and on the other hand for cooling the system required for inductive heating, and also the acquisition costs for this system to improve the energy efficiency of the entire process.
Diese Aufgabe wird nun erfindungsgemäß gelöst durch ein Trägermaterial für die eingangs genannte Vorrichtung, dessen Curie-Temperatur über derjenigen des reinen Eisens liegt.This object is now achieved according to the invention by a carrier material for the device mentioned at the beginning, the Curie temperature of which is above that of pure iron.
Eine bevorzugte Ausführungsform eines erfindungsgemäßen Trägermaterials ist eine ferromagnetische Legierung aus Eisen, Kobalt und Vanadium, und zwar eine Legierung FexCovVz, bei welcher x und y jeweils zwischen 5 und 95 Gewichtprozenten und z zwischen 0 und 10 Gewichtsprozenten des Gesamtsgewichts betragen. Da mit zunehmendem Kobaltgehalt dieser Legierung die mechanischen Eigenschaften des Trägermaterials, wie Dehnung, Dehngrenze, Zugfestigkeit, Härte etc. , bezogen auf die weitere Bearbeitbarkeit, schlechtere Werte annehmen, werden im Rahmen des angegebenen Bereichs kleinere Mengen an Vanadium beigemengt, um dem entgegenzuwirken.A preferred embodiment of a carrier material according to the invention is a ferromagnetic alloy made of iron, cobalt and vanadium, specifically an alloy Fe x Co v V z , in which x and y are each between 5 and 95 percent by weight and z between 0 and 10 percent by weight of the total weight. Since the mechanical properties of the carrier material, such as elongation, yield strength, tensile strength, hardness etc., assume poorer values with respect to the further machinability with increasing cobalt content of this alloy, smaller amounts of vanadium are added within the range specified in order to counteract this.
Durch die Tatsache, daß die Curie-Temperatur einer solchen Legierung oberhalb derjenigen des reinen Eisens liegt, werden bei der induktiven Erwärmung der ein solches Trägermaterial verwendenden Vorrichtung bis zum Erreichen der erforderlichen Endtemp eratur, also derjenigen Temperatur, bei welcher die Quecksilberverbindung thermisch aufgeschlossen wird und auch ein Getterprozeß gegebenenfalls durchgeführt werden kann, sowohl die Wirbelstrom- als auch Ummagnetisierungsprozesse ausgenutzt, solange diese Endtemp eratur noch unter dieser erfindungsgemäß erhöhten Curie-Temperatur liegt.Due to the fact that the Curie temperature of such an alloy is above that of pure iron, the induction heating of the device using such a carrier material will result in temperature reaching the required final temperature, i.e. the temperature at which the mercury compound is thermally digested and a getter process can also be carried out if necessary, utilizing both the eddy current and magnetic reversal processes, as long as this final temperature is still below this increased Curie temperature according to the invention.
Der sich aus der Erfindung ergebende Vorteil besteht somit darin, daß der für die induktive Erwärmung erforderliche elektrische Energieaufwand stark gesenkt wird. Daraus folgt wiederum, daß auch der Aufwand für die Kühlung des für die induktive Erwärmung nötigen Systems sich drastisch vermindert. Als weiterer Vorteil ergibt sich eine erhebliche Verringerung der Anschaffungskosten des für die induktive Erwärmung nötigen Systems, da dieses nun einmal für einen geringeren Energieaufwand ausgelegt werden kann.The advantage resulting from the invention is thus that the electrical energy required for inductive heating is high is lowered. This in turn means that the cost of cooling the system required for inductive heating is also drastically reduced. Another advantage is the considerable reduction in the initial cost of the system required for inductive heating, since it can now be designed for lower energy consumption.
Stimmen die minimal erforderliche Endtemperatur einerseits und die Curie- Temperatur andererseits im wesentlichen überein, dann ergibt sich ein weiterer Vorteil der Erfindung, sobald die Curie-Temperatur überschritten ist. Es fallen dann die Ummagnetisierungsverluste weg und es wirken nur noch verminderte Wirbelstromprozesse, womit der Gefahr eines Überhitzens der Vorrichtung entgegengewirkt werden kann, die zu einer Schwärzung der Lampenhülle und somit zu Ausschuß führen könnte.If the minimum required final temperature on the one hand and the Curie temperature on the other hand essentially match, then another advantage of the invention results as soon as the Curie temperature is exceeded. The magnetic reversal losses are then eliminated and only reduced eddy current processes act, which can counteract the risk of the device overheating, which could lead to blackening of the lamp envelope and thus to rejects.
Daraus folgt, daß die jeweilige spezielle Legierung des Trägermaterials nach der Erfindung derart eingestellt werden kann, daß deren Curie-Temperatur mit der erforderlichen minimalen Endtemperatur bei dem jeweiligen speziellen Herstellungsprozeß der Leuchtstofflampen übereinstimmt bzw. geringfügig über dieser Endtemperatur liegt.It follows that the respective special alloy of the carrier material according to the invention can be set such that its Curie temperature corresponds to the required minimum end temperature in the respective special manufacturing process of the fluorescent lamps or is slightly above this end temperature.
Eine bevorzugt verwendete Legierung weist dabei Werte von x = 83 und y = 1 7 auf. Hierbei ist der Kobaltgehalt noch nicht so hoch, daß die mechanischen Eigenschaften bereits, wie weiter oben erwähnt, derart verschlechterte Werte besäßen, daß eine Beimengung von Vanadium erforderlich wäre. Aus diesem Grunde ist hier z = 0.An alloy used with preference has values of x = 83 and y = 17. Here, the cobalt content is not yet so high that, as mentioned above, the mechanical properties would already have such deteriorated values that an admixture of vanadium would be necessary. For this reason, z = 0 here.
Vor dem Aufbringen des das Quecksilber enthaltenden Gemisches kann es zweckmäßig sein, das Trägermatetial einseitig oder beidseitig mit einer Nickelschicht zu überziehen. Before the mixture containing the mercury is applied, it may be expedient to coat the carrier material on one side or on both sides with a nickel layer.

Claims

A N S P R U C H E EXPECTATIONS
1.1.
Trägermaterial für eine Vorrichtung, die als Quecksilberquelle und/oder Gasabsorber (Getter) und/oder Elektrodenabschirmung in Leuchtstofflampen dient, dadurch gekennzeichnet, daß es aus einer ferromagnetischen Legierung mit einer Curie-Temperatur besteht, die höher liegt als die des reinen Eisens.Support material for a device which serves as a mercury source and / or gas absorber (getter) and / or electrode shielding in fluorescent lamps, characterized in that it consists of a ferromagnetic alloy with a Curie temperature which is higher than that of pure iron.
2.Second
Trägermaterial nach Anspruch 1 , dadurch gekennzeichnet, daß die Legierung aus FexCθyVz besteht, wobei x und y jeweils zwischen 5 und 95 Gewichtsprozenten und z zwischen 0 und 10 Gewichtsprozenten des Gesamtgewichts betragen.Support material according to claim 1, characterized in that the alloy consists of Fe x CθyVz, where x and y are each between 5 and 95 percent by weight and z between 0 and 10 percent by weight of the total weight.
j .j.
Trägermaterial nach Anspruch 2, dadurch gekennzeichnet, daß x=83, y= 17 und z=0 sind.Support material according to claim 2, characterized in that x = 83, y = 17 and z = 0.
4.4th
Trägermaterial nach Anspruch 1 , 2 oder 3 , dadurch gekennzeichnet, daß es einseitig mit einer Nickelschicht überzogen ist.Support material according to claim 1, 2 or 3, characterized in that it is coated on one side with a nickel layer.
5.5th
Trägermaterial nach Anspruch 1 , 2 oder 3 , dadurch gekennzeichnet, daß es beidseitig mit einer Nickelschicht überzogen ist. Support material according to claim 1, 2 or 3, characterized in that it is coated on both sides with a nickel layer.
PCT/EP2000/009242 1999-09-21 2000-09-21 Support material WO2001022464A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19945072.2 1999-09-21
DE19945072 1999-09-21

Publications (1)

Publication Number Publication Date
WO2001022464A1 true WO2001022464A1 (en) 2001-03-29

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WO (1) WO2001022464A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2110719A (en) * 1981-11-30 1983-06-22 Anelva Corp Sputtering apparatus
WO1993011655A1 (en) * 1991-11-27 1993-06-10 Minnesota Mining And Manufacturing Company Electromagnetic radiation susceptor material employing ferromagnetic amorphous alloy particles
RU2024103C1 (en) * 1991-06-27 1994-11-30 Научно-исследовательский институт "Платан" Optical-relay tube target
EP0691670A2 (en) * 1994-07-07 1996-01-10 Saes Getters S.P.A. A combination of materials for mercury-dispensing devices, method of preparation and devices thus obtained
WO1997019461A1 (en) * 1995-11-23 1997-05-29 Saes Getters S.P.A. Process for producing a device for mercury dispensing, reactive gases sorption and electrode shielding within fluorescent lamps and device thus produced
WO1998053479A1 (en) * 1997-05-22 1998-11-26 Saes Getters S.P.A. Device and method for introducing small amounts of mercury into fluorescent lamps

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657589A (en) * 1969-10-20 1972-04-18 Getters Spa Mercury generation
US4308650A (en) * 1979-12-28 1982-01-05 Gte Products Corporation Method of making a mercury dispenser, getter and shield assembly for a fluorescent lamp
DE9210171U1 (en) * 1992-07-29 1992-10-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Amalgam body or amalgam former body for a fluorescent lamp
DE19528390A1 (en) * 1995-08-02 1997-02-06 Sli Lichtsysteme Gmbh Metal strip, in particular steel strip, for the production of shields for installation in low-pressure discharge lamps in particular

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2110719A (en) * 1981-11-30 1983-06-22 Anelva Corp Sputtering apparatus
RU2024103C1 (en) * 1991-06-27 1994-11-30 Научно-исследовательский институт "Платан" Optical-relay tube target
WO1993011655A1 (en) * 1991-11-27 1993-06-10 Minnesota Mining And Manufacturing Company Electromagnetic radiation susceptor material employing ferromagnetic amorphous alloy particles
EP0691670A2 (en) * 1994-07-07 1996-01-10 Saes Getters S.P.A. A combination of materials for mercury-dispensing devices, method of preparation and devices thus obtained
WO1997019461A1 (en) * 1995-11-23 1997-05-29 Saes Getters S.P.A. Process for producing a device for mercury dispensing, reactive gases sorption and electrode shielding within fluorescent lamps and device thus produced
WO1998053479A1 (en) * 1997-05-22 1998-11-26 Saes Getters S.P.A. Device and method for introducing small amounts of mercury into fluorescent lamps

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section EI Week 199527, Derwent World Patents Index; Class V05, AN 1995-205405, XP002157432 *

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