EP0465759A2 - Radiateur infrarouge avec une couche réfléchissante protégée et son procédé de fabrication - Google Patents

Radiateur infrarouge avec une couche réfléchissante protégée et son procédé de fabrication Download PDF

Info

Publication number
EP0465759A2
EP0465759A2 EP91101742A EP91101742A EP0465759A2 EP 0465759 A2 EP0465759 A2 EP 0465759A2 EP 91101742 A EP91101742 A EP 91101742A EP 91101742 A EP91101742 A EP 91101742A EP 0465759 A2 EP0465759 A2 EP 0465759A2
Authority
EP
European Patent Office
Prior art keywords
protective coating
zirconium
infrared radiator
silicon
reflection layer
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.)
Granted
Application number
EP91101742A
Other languages
German (de)
English (en)
Other versions
EP0465759B1 (fr
EP0465759A3 (en
Inventor
Wolfgang Göbel
Klaus Schmitz
Wolfgang Wild
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.)
Heraeus Noblelight GmbH
Original Assignee
Heraeus Quarzglas GmbH and Co KG
Heraeus Noblelight 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 Heraeus Quarzglas GmbH and Co KG, Heraeus Noblelight GmbH filed Critical Heraeus Quarzglas GmbH and Co KG
Priority to AT9191101742T priority Critical patent/ATE105131T1/de
Publication of EP0465759A2 publication Critical patent/EP0465759A2/fr
Publication of EP0465759A3 publication Critical patent/EP0465759A3/de
Application granted granted Critical
Publication of EP0465759B1 publication Critical patent/EP0465759B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material

Definitions

  • the invention relates to an infrared radiator with a heat conductor arranged in a cladding tube made of quartz glass or quartz material and a metallic reflection layer applied to the back of the cladding tube, and a method for its production.
  • Infrared emitters the heating conductors of which are surrounded by a cladding tube made of quartz glass or quartz material, are known, for example, from German patents 1,540,818 and 38,41,448.
  • the cladding tube can be provided on its back with a reflection layer made of metal, for example aluminum or gold.
  • Infrared radiators of this type are also described in the brochures of Heraeus Quarzschmelze GmbH "Short-wave infrared radiators made from Hanau quartz glass” (PIR-B 20) and “Medium-wave twin-tube infrared radiators" (PIR-B 10).
  • German patent specification 26 37 338 One possibility of avoiding the destruction of the reflection layer of an infrared radiator is known from German patent specification 26 37 338.
  • the infrared radiator has a cooling tube through which a coolant flows.
  • the reflective layer is located on the cooling pipe and is thus protected against destruction by evaporation.
  • the infrared radiator which is the solution to the problem is characterized according to the invention in that the reflection layer is provided with a protective coating of zirconium dioxide, silicon dioxide, tin dioxide or a mixture of at least two of these oxides.
  • the infrared heater has proven itself when the thickness of the protective coating is 0.05 - 3 micrometers.
  • the protective coating with a thickness of 0.1-0.3 micrometers is preferred.
  • the protective coating can also consist of a mixture of two or all three of these oxides. If an oxide mixture forms the protective coating, the amount of the individual oxides can be chosen as desired.
  • the protective coating made of zirconium dioxide has proven particularly useful since it not only increases the thermal resistance of the reflective layer, but also has other advantageous properties, such as very good adhesive strength.
  • the protective coating is suitable for all metallic reflective layers applied to the cladding tube of infrared radiators. It has proven particularly useful on reflective layers consisting of gold, palladium, platinum, gold / palladium or gold / platinum.
  • the reflector effect of the reflection layers provided with the protective coating according to the invention is significantly better than that of the reflection layers without a protective coating.
  • the unprotected reflective layers are partially destroyed and the metal that is still present is no longer in the form of a coherent layer.
  • the infrared radiator according to the invention can also advantageously be used for drying goods containing solvents, since its reflective layer is also protected against solvent vapors by the coating. At the same time, the mechanical resistance is also improved, so that the reflection layer is not so easily damaged when handling the radiator.
  • the process for producing the infrared radiator provided with a protected reflection layer on the cladding tube according to the invention is characterized in that a thermally decomposable organic zirconium, silicon or tin compound or a mixture of at least two of these compounds is applied to the reflection layer and at 600-950 ° C is burned in.
  • the application and stoving are preferably repeated one or more times because this can increase the tightness of the protective coating and thus the thermal resistance of the metallic reflection layer.
  • Suitable thermally decomposable organic zirconium, silicon and tin compounds which are converted into the corresponding oxide when baked are, for example, alcoholates, complexes with aliphatic diketones such as acetylacetone, resinates and salts of aliphatic and aromatic carboxylic acids.
  • the resinates and salts of octanoic acid and, as silicon compounds, also silicone resins are preferred.
  • thermally decomposable organic zirconium, silicon and tin compounds are preferably used together with an organic carrier which burns or vaporizes completely during baking and in which the compounds are soluble.
  • the organic carrier is known per se and consists of organic solvents, essential oils, resins and the like. Examples of these are methyl ethyl ketone, cyclohexanone, ethyl acetate, amyl acetate, cellosolve (ethylene glycol ether), butanol, nitrobenzene, toluene, xylene, petroleum ether, chloroform, carbon tetrachloride, various terpenes, such as pinene, dipentene, dipentene oxide and the like, essential oils, lavender oils, such as lavender oils, such as lavender oils, such as lavender oils, such as lavender oils, such as rosemary oils, such as rosemary oils, such as rosemary oils, Anise oil, sassafras oil, wintergreen oil, fennel oil and turpentine oil, Assyrian asphalt, various pine resins and balms as well as synthetic resins and mixtures thereof (see German patent specification 12 86 866).
  • the solutions made from organic carrier and zirconium, silicon and / or tin compounds are applied to the reflective layer, for example by printing, rolling, spraying, brushing or coating with a sponge.
  • an infrared radiator with a protected metallic reflection layer according to the invention can be produced in a simple manner and without great expenditure on equipment. Since the zirconium, silicon and tin compounds used in the process and the organic carrier do not react with the metal of the reflective layer during baking, the properties of the metal which are important for the reflector effect are not impaired by the application of the protective coating.
  • the protective coatings obtained by baking are evenly dense and thick and adhere well to the reflective layer.
  • a solution is applied to the gold layer of a quartz glass cladding tube section which is gold-plated on the outside on one side 70.6 g of zirconium octanoate solution in white spirit, 8.5% Zr, and 29.4 g of turpentine oil brushed on and baked at 800 ° C for 15 minutes.
  • the thickness of the protective coating thus produced is approximately 0.15 micrometers.
  • a solution containing 6% Si is poured onto the gold layer of a quartz glass cladding tube section which is gold-plated on the outside on one side 26.0 g silicone resin, 23% Si, and 74 g pine oil sprayed on and baked at 800 ° C for 15 minutes.
  • the thickness of the protective coating produced in this way is approximately 0.1 micrometer.
  • a solution is applied to the gold layer of a quartz glass cladding tube section which is gold-plated on the outside on one side 14.8 g tin octanoate, 27% Sn, 12.0 g of Dammar resin and 70.2 g pine oil brushed on and baked at 800 ° C for 15 minutes.
  • the thickness of the protective coating produced in this way is approximately 0.1 micrometer.
  • the partially gold-coated cladding tube sections provided with a protective coating are exposed to a temperature of 1000 ° C. for 4 hours and then visually inspected, according to the examples and, for comparison, correspondingly partially gold-plated, but not having a protective coating.
  • the cladding tube sections provided with the protective coating according to the invention show a more closed and denser gold layer than the cladding tube sections without a protective coating.
  • a reflection layer made of gold, short-wave infrared radiators and medium-wave twin-tube infrared radiators made of Hanau quartz glass are, as described in the examples, provided with a protective coating made of zirconium dioxide, silicon dioxide or tin dioxide.
  • a protective coating made of zirconium dioxide, silicon dioxide or tin dioxide.

Landscapes

  • Resistance Heating (AREA)
  • Surface Treatment Of Glass (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Glass Compositions (AREA)
  • Paints Or Removers (AREA)
EP91101742A 1990-07-09 1991-02-08 Radiateur infrarouge avec une couche réfléchissante protégée et son procédé de fabrication Expired - Lifetime EP0465759B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191101742T ATE105131T1 (de) 1990-07-09 1991-02-08 Infrarotstrahler mit geschuetzter reflexionsschicht und verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021798A DE4021798A1 (de) 1990-07-09 1990-07-09 Infrarotstrahler mit geschuetzter reflexionsschicht und verfahren zu seiner herstellung
DE4021798 1990-07-09

Publications (3)

Publication Number Publication Date
EP0465759A2 true EP0465759A2 (fr) 1992-01-15
EP0465759A3 EP0465759A3 (en) 1992-02-05
EP0465759B1 EP0465759B1 (fr) 1994-04-27

Family

ID=6409939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101742A Expired - Lifetime EP0465759B1 (fr) 1990-07-09 1991-02-08 Radiateur infrarouge avec une couche réfléchissante protégée et son procédé de fabrication

Country Status (4)

Country Link
EP (1) EP0465759B1 (fr)
JP (1) JPH0799712B2 (fr)
AT (1) ATE105131T1 (fr)
DE (2) DE4021798A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0702395A3 (fr) * 1994-09-13 1997-01-29 Gen Electric Lampe à revêtement de protection en silice
EP1038550A3 (fr) * 1999-03-22 2002-03-13 SEVRI - Saunabau Fritz Seebauer Cabine de traitement thermique
EP1344753A1 (fr) * 2002-03-13 2003-09-17 Heraeus Noblelight GmbH Radiateur infrarouge en verre de quartz, couche réfléchissante métallique formée sur le verre et procédé de fabrication
DE10253582B3 (de) * 2002-11-15 2004-07-15 Heraeus Noblelight Gmbh Infrarotstrahler, Verfahren zu seiner Herstellung und seine Verwendung
WO2005029536A2 (fr) * 2003-09-23 2005-03-31 Koninklijke Philips Electronics N.V. Ampoule electrique munie d'un film interferentiel optique
DE102005018454A1 (de) * 2005-04-20 2006-11-09 Deutsche Mechatronics Gmbh Wärmestrahler
CN105376876A (zh) * 2014-09-02 2016-03-02 北京强度环境研究所 一种石英灯辐射加热器及其设计方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19941020B4 (de) * 1999-08-28 2007-07-19 Ferro Gmbh Glanzedelmetallpräparat für den Hochtemperaturbrand und Verfahren zur Herstellung von Glanzedelmetalldekoren
DE102022111985A1 (de) * 2022-05-12 2023-11-16 Heraeus Noblelight Gmbh Infrarot-Strahler mit einer auf eine Reflektorschicht aus Metall aufgebrachten emissiven Schicht und Verwendung der emissiven Schicht

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320363A1 (fr) * 1975-08-13 1977-03-04 Bosch Gmbh Robert Procede pour ameliorer la tenue des couches protectrices constituees d'oxyde de silicium
GB1507532A (en) * 1974-08-29 1978-04-19 Heraeus Gmbh W C Reflectors for infra-red radiation
GB1541980A (en) * 1977-12-08 1979-03-14 Electricity Council Electric radiant heaters
DE2945823A1 (de) * 1978-11-13 1980-05-14 Nhk Spring Co Ltd Beschichteter gegenstand

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445662A (en) * 1964-12-28 1969-05-20 Engelhard Min & Chem Composite coated heat reflectors and infrared lamp heaters equipped therewith
DE2637338C3 (de) * 1976-08-19 1979-08-09 Heraeus Quarzschmelze Gmbh, 6450 Hanau KUhlbares Infrarotstrahlerelement
DE3125267A1 (de) * 1981-06-26 1983-01-13 Patra Patent Treuhand Halogenellipsoidreflektorlampe mit kaltlichtreflektor
DE3841448C1 (fr) * 1988-12-09 1990-05-10 Heraeus Quarzschmelze Gmbh, 6450 Hanau, De
JPH0791089B2 (ja) * 1988-12-13 1995-10-04 セントラル硝子株式会社 熱線反射ガラス

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1507532A (en) * 1974-08-29 1978-04-19 Heraeus Gmbh W C Reflectors for infra-red radiation
FR2320363A1 (fr) * 1975-08-13 1977-03-04 Bosch Gmbh Robert Procede pour ameliorer la tenue des couches protectrices constituees d'oxyde de silicium
GB1541980A (en) * 1977-12-08 1979-03-14 Electricity Council Electric radiant heaters
DE2945823A1 (de) * 1978-11-13 1980-05-14 Nhk Spring Co Ltd Beschichteter gegenstand

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0702395A3 (fr) * 1994-09-13 1997-01-29 Gen Electric Lampe à revêtement de protection en silice
EP1038550A3 (fr) * 1999-03-22 2002-03-13 SEVRI - Saunabau Fritz Seebauer Cabine de traitement thermique
EP1344753A1 (fr) * 2002-03-13 2003-09-17 Heraeus Noblelight GmbH Radiateur infrarouge en verre de quartz, couche réfléchissante métallique formée sur le verre et procédé de fabrication
DE10211249A1 (de) * 2002-03-13 2003-10-02 Heraeus Noblelight Gmbh Infrarotstrahler mit Hüllrohr und darauf befindlicher metallischer Reflexionsschicht, sowie Verfahren zu deren Herstellung
DE10253582B3 (de) * 2002-11-15 2004-07-15 Heraeus Noblelight Gmbh Infrarotstrahler, Verfahren zu seiner Herstellung und seine Verwendung
WO2005029536A2 (fr) * 2003-09-23 2005-03-31 Koninklijke Philips Electronics N.V. Ampoule electrique munie d'un film interferentiel optique
WO2005029536A3 (fr) * 2003-09-23 2006-11-16 Koninkl Philips Electronics Nv Ampoule electrique munie d'un film interferentiel optique
DE102005018454A1 (de) * 2005-04-20 2006-11-09 Deutsche Mechatronics Gmbh Wärmestrahler
CN105376876A (zh) * 2014-09-02 2016-03-02 北京强度环境研究所 一种石英灯辐射加热器及其设计方法
CN105376876B (zh) * 2014-09-02 2018-07-27 北京强度环境研究所 一种石英灯辐射加热器及其设计方法

Also Published As

Publication number Publication date
JPH0799712B2 (ja) 1995-10-25
ATE105131T1 (de) 1994-05-15
DE4021798A1 (de) 1992-02-06
EP0465759B1 (fr) 1994-04-27
EP0465759A3 (en) 1992-02-05
JPH04229980A (ja) 1992-08-19
DE59101486D1 (de) 1994-06-01

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