EP0344732B1 - Lampe à décharge aux halogénures métalliques - Google Patents

Lampe à décharge aux halogénures métalliques Download PDF

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Publication number
EP0344732B1
EP0344732B1 EP19890109784 EP89109784A EP0344732B1 EP 0344732 B1 EP0344732 B1 EP 0344732B1 EP 19890109784 EP19890109784 EP 19890109784 EP 89109784 A EP89109784 A EP 89109784A EP 0344732 B1 EP0344732 B1 EP 0344732B1
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EP
European Patent Office
Prior art keywords
sodium
gallium
iodine
discharge lamp
metal halide
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 - Lifetime
Application number
EP19890109784
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German (de)
English (en)
Other versions
EP0344732A1 (fr
Inventor
Klaus Dr. Hilpert
Dietrich Dr. Fromm
Jürgen Seehawer
Jürgen Heider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forschungszentrum Juelich GmbH
Osram GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Osram 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 Forschungszentrum Juelich GmbH, Osram GmbH filed Critical Forschungszentrum Juelich GmbH
Publication of EP0344732A1 publication Critical patent/EP0344732A1/fr
Application granted granted Critical
Publication of EP0344732B1 publication Critical patent/EP0344732B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component

Definitions

  • the invention relates to metal halide discharge lamps with a filling containing sodium and gallium halide and in particular comprises a discharge lamp for room lighting with high luminous efficacy.
  • Metal halide discharge lamps contain different metal halides as fillings.
  • it is crucial to achieve the highest possible sodium concentration in the core of the discharge, without putting too much thermal load on the burner wall.
  • the required low color temperature is achieved by the intensive radiation of the Na resonance line pair at 590 nm.
  • additional metal halides which form gaseous heterocomplexes with the sodium halide also used, has proven to be an effective measure for such an increase in concentration.
  • Such heterocomplexes can have a higher vapor pressure than the pure sodium halide over the burner wall and then lead to the desired increase in sodium concentration in the arc core.
  • DE-A-20 59 577 describes a discharge lamp which contains sodium and indium in a molar ratio of 0.05 to 0.8.
  • a reinforcing effect is intended in particular through aluminum halides can be achieved, Na / Al molar ratios of 0.3 to 10 being preferred.
  • such lamps should contain at least one of the metals Na, Li, K, Cs, Ca, Sr, Ba and possibly Cd, Ga, In, Tl, Sn, Sc, Y and rare earths.
  • a discharge lamp is known from DE-C-26 05 290, which contains sodium halide and tin in addition to mercury and noble gas, the Na / Sn molar ratios in particular should be between 0.01 and 50.
  • discharge lamps which contain mercury, argon and In (possibly replaced by Ga), Na, Li, Sn (possibly replaced by Al), halogen and Tl, in which for the Complex formation with sodium halide, in addition to the indium (or gallium) halides present, essentially halogen compounds of the elements tin and / or aluminum are to be effective.
  • a Na / In (Ga) molar ratio of 0.012 to 4.8 is calculated from the range limits given.
  • the lamp filling given as an example contains, in addition to Ar, Hg, HgJ, TlJ and LiJ, the compounds NaJ, InJ and SnJ2, Na to In being present in a molar ratio of 0.81.
  • Such lamps can be designed with a warm light color that is attractive for room lighting, so that in view of the high luminous efficacy an application in this regard should be of great interest.
  • Particularly high Na reinforcements have mixtures with approximately equal molar parts of NaCl and GaCl3. A variation in the light color can be achieved by changing the molar ratio.
  • relatively low Na / Ga molar ratios will be selected within the defined range; the usual rare earth additives can be dispensed with in such lamps.
  • the amplification effect achieved by the complex formation is of general interest for metal halide discharge lamps.
  • a certain proportion of the halogen component should be formed by iodide (in particular at least 5%, preferably> 10%), but then the reinforcing one Effect is reduced, so that depending on the application, a certain upper limit should not be exceeded.
  • lamps that only contain iodide also prove useful, which would be particularly important for a warm light color. However, such lamps are not within the scope of the claims below.
  • the metal halide discharge lamps of the type mentioned at the outset are accordingly featured through a filling consisting exclusively of sodium, gallium and thallium halides, mercury and noble gas, whereby sodium and gallium are present as mixed halides of chlorine and iodine, bromine and iodine or chlorine, bromine and iodine, the iodine content of the halogen of which does not exceed 85 at% and whose molar ratio of sodium to gallium is over 1.
  • a measure of the sodium concentration increase in the arc core is the ratio of the sodium concentration in the steam over a mixture of sodium halide and the added complex-forming metal halide to the sodium concentration over pure sodium iodide at the burner wall temperature. This relationship is called E. This was determined for different soil bodies at the cold-spot temperature of 800 ° C, which is typical for metal halide burners, using vapor density measurements. Table 1 shows the results obtained.
  • iodide-containing mixtures are provided whose corrosivity is reduced.
  • the iodine content of the halogen should preferably be above 40 at%, in particular between 50 and 80 at%.
  • the molar ratio of sodium halide to gallium halide that is expediently selected, which is chosen in particular in the range from 1 to 19, is also subject to limiting influences: on the one hand, the desired sodium gain is hardly achieved by an excessively low proportion of gallium, while, on the other hand, excessively high gallium proportions are achieved via the gallium resonance lines mentioned in the blue spectral range lead to an undesirable increase in color temperature. Molar ratios of Na to Ga from 2 to 8, in particular around the value 3, are therefore preferred.
  • thallium halide is suitable for bringing the color coordinates X and Y of the arc radiation as close as possible to those of the Planckian radiator.
  • a color point above the Planck curve causes a green cast of the emitted light, while below the Planck curve (too small Y values) there is an unnatural reddish color impression.
  • FIG. 1 shows the discharge vessel 1 made of quartz glass and the outer bulb 2 surrounding it.
  • the isothermally designed discharge vessel has a maximum inner diameter of 9 mm, an electrode spacing of 7 mm and an inner volume of approximately 0.7 cm 3.
  • the electrodes are helical.
  • the ends of the discharge vessel 1 are provided with a zirconium dioxide coating 3 reflecting the heat radiation.
  • the discharge vessel shown was provided with the following fillings in addition to the ignition gas Ar (80 mbar)

Landscapes

  • Discharge Lamp (AREA)

Claims (4)

  1. Lampes à décharge contenant des halogénures de métal, avec une charge formée exclusivement d'halogénures de sodium, de gallium et de thallium, de mercure et d'un gaz rare, le sodium et le gallium étant sous la forme d'halogénures mélangés de chlore et d'iode, de brome et d'iode, ou de chlore, de brome et d'iode, la quantité d'iode de l'halogène représentant au plus 85 % At, et le rapport molaire du sodium au gallium étant supérieur à 1.
  2. Lampe à décharge selon la revendication 1, caractérisée en ce que le sodium et le gallium sont sous la forme d'halogénures mélangés, la quantité d'iode de l'halogène représentant entre 50 et 80 % At.
  3. Lampe à décharge selon la revendication 1 ou 2, caractérisée par un rapport molaire du sodium au gallium de 1 à 19, particulièrement de 2 à 8.
  4. Lampe à décharge pour l'éclairage d'une pièce avec un rendement lumineux élevé, caractérisé par une charge avec un rapport molaire de Na/Ga valant environ 3.
EP19890109784 1988-06-03 1989-05-31 Lampe à décharge aux halogénures métalliques Expired - Lifetime EP0344732B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818966 1988-06-03
DE3818966 1988-06-03

Publications (2)

Publication Number Publication Date
EP0344732A1 EP0344732A1 (fr) 1989-12-06
EP0344732B1 true EP0344732B1 (fr) 1994-10-26

Family

ID=6355809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890109784 Expired - Lifetime EP0344732B1 (fr) 1988-06-03 1989-05-31 Lampe à décharge aux halogénures métalliques

Country Status (2)

Country Link
EP (1) EP0344732B1 (fr)
DE (1) DE58908551D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100405527C (zh) * 2005-06-01 2008-07-23 广东雪莱特光电科技股份有限公司 一种小功率金属卤化物放电灯

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438294A1 (de) * 1994-10-26 1996-05-02 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-Entladungslampe für fotooptische Zwecke
DE19613502C2 (de) * 1996-04-04 1998-07-09 Heraeus Noblelight Gmbh Langlebiger Excimerstrahler und Verfahren zu seiner Herstellung
DE10254969A1 (de) 2002-11-26 2004-06-03 Philips Intellectual Property & Standards Gmbh Hochdruckentladungslampe mit Quecksilberchlorid bei begrenztem Chlorgehalt

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52314B1 (fr) * 1971-05-11 1977-01-06
US3832591A (en) * 1973-04-30 1974-08-27 Westinghouse Electric Corp High luminous efficacy white appearing lamp
DE2725297C3 (de) * 1977-06-04 1980-10-16 Philips Patentverwaltung Gmbh, 2000 Hamburg Hochdruckquecksilberdampfentladungslampe
GB2023339A (en) * 1978-06-19 1979-12-28 Thorn Electrical Ind Ltd Light source for Super 8 mm cine projector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100405527C (zh) * 2005-06-01 2008-07-23 广东雪莱特光电科技股份有限公司 一种小功率金属卤化物放电灯

Also Published As

Publication number Publication date
EP0344732A1 (fr) 1989-12-06
DE58908551D1 (de) 1994-12-01

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