WO2002078398A1 - Ceramic cooking system with glass ceramic plate, insulation layer and heating elements - Google Patents

Ceramic cooking system with glass ceramic plate, insulation layer and heating elements Download PDF

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Publication number
WO2002078398A1
WO2002078398A1 PCT/EP2002/002062 EP0202062W WO02078398A1 WO 2002078398 A1 WO2002078398 A1 WO 2002078398A1 EP 0202062 W EP0202062 W EP 0202062W WO 02078398 A1 WO02078398 A1 WO 02078398A1
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WO
WIPO (PCT)
Prior art keywords
ceramic plate
glass ceramic
cooking system
insulation layer
structural elements
Prior art date
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PCT/EP2002/002062
Other languages
German (de)
French (fr)
Inventor
Karsten Wermbter
Holger Köbrich
Original Assignee
Schott Glas
Carl-Zeiss-Stiftung Trading As Schott Glas
Carl-Zeiss-Stiftung
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 Schott Glas, Carl-Zeiss-Stiftung Trading As Schott Glas, Carl-Zeiss-Stiftung filed Critical Schott Glas
Priority to CA002439602A priority Critical patent/CA2439602A1/en
Priority to DK02722143T priority patent/DK1368993T3/en
Priority to AT02722143T priority patent/ATE285164T1/en
Priority to EP02722143A priority patent/EP1368993B1/en
Priority to DE50201781T priority patent/DE50201781D1/en
Publication of WO2002078398A1 publication Critical patent/WO2002078398A1/en

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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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • 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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater

Definitions

  • the invention relates to a ceramic cooking system with a glass ceramic plate, which carries on its underside an insulation layer with heating elements for direct heating of the glass ceramic plate.
  • These ceramic cooking systems with direct heating of the glass ceramic plate are characterized by high parboiling performance and have advantages over heating by means of radiant heaters in terms of efficiency and design options.
  • Ceramic cooking systems consist of a flat glass ceramic plate, on the top of which the cooking vessel to be heated is placed.
  • the glass ceramic plates include oxidic and non-oxidic ceramics, such as WO
  • an insulation layer for electrical insulation is applied between the glass ceramic plate and the heating elements. Substances with high electrical are suitable as material for this insulation layer
  • Insulation value especially AL 2 O 3 - SiO 2 - MgO material systems with materials such as corundum, mullite, periclase, spinel and cordierite as well as ZrO 2
  • the heating elements are applied to the insulation layer.
  • Thin layers can be provided over the entire surface as heating elements by sputtering or in the CVD process, SnO 2 in particular being used, as WO 00/18189 shows.
  • Another possibility is to apply thick-film conductor tracks made of silver-palladium alloys using the screen printing method, as is known from EP 0 861
  • the underside of the glass ceramic plate has a fine structure with structural elements that have a length between 10 and 250 ⁇ m and a height between 1 and 100 ⁇ m and at least partially undercuts form for interlocking with the insulation layer.
  • the fine structure is superimposed on a grid-shaped knob structure, which is chosen for reasons of better dimensional stability of the glass ceramic plate.
  • the improvement in adhesion can be achieved both in that the structural elements of the fine structure are formed in one piece with the glass ceramic plate and in that the fine structure is formed by separate structural elements applied to the glass ceramic plate. It is provided in the latter case that the structural elements consist of ceramic powder, such as AL 2 O 3 , SiO 2 , MgO, spinel, which is optionally mixed with metal oxide additives, such as Ti0 2 and alkalis, such as Na, and that Structural elements have spheroidal, angular and irregular shapes.
  • the length of the structural elements is preferably chosen between 40 and 100 ⁇ m and the height between 20 and 60 ⁇ m.
  • Fig. 2 shows a cooking system in which the fine structure is formed on the underside of the glass ceramic plate by applied structural elements
  • Fig. 3 shows a cooking system in which the fine structure of a knob structure is superimposed on the underside of the glass ceramic plate.
  • FIG. 1 shows a schematic partial section of a ceramic cooking system, the dimensions of which do not correspond to the actual circumstances but only serve to explain the invention.
  • the glass ceramic plate 10 still has a flat top for setting up the cooking vessel.
  • the underside 11 is, however, provided with a fine structure 12, which is formed by structural elements 13, which are produced by elevations and / or depressions of the surface plane.
  • These structural elements 13 have a length L parallel to the top of the glass ceramic plate 10 and a height H perpendicular thereto.
  • the length L applies in all directions and the height H applies to both depressions and elevations.
  • the structural elements 1 3 have different shapes and at least partially form undercuts so that the applied insulation layer 20 can interlock with the fine structure 12 and thus the glass ceramic plate 10. That facing away from the glass ceramic plate 10
  • the underside of the insulation layer 20 carries the heating element or elements which are formed by applied thick-layer conductor tracks 30.
  • the fine structure 1 2 can also be formed by separate structural elements 13, which are applied to the flat underside 11 of the glass ceramic plate 10.
  • irregular shapes are used for the structural elements 13, which allow partial interlocking between the insulation layer 20 and the fine structure 12 and thus glass-ceramic plate 10.
  • the fine structure 12 can also be superimposed on the underside 11 of a glass ceramic plate 10 provided with a grid-like knob structure 15. Separate structural elements 13 are used in the exemplary embodiment shown.
  • the knob structure 15 is made in one piece with the glass ceramic plate 10.
  • the shapes of the structural elements 13 can be of any type and can be spheroidal, angular and irregular.
  • ceramic powders such as AL 2 O 3 , SiO 2 , MgO and spinel are preferred, which are mixed with metal oxide additives such as TiO 2 and alkalis such as Na.

Abstract

The invention relates to a ceramic cooking system with a glass ceramic plate, provided on the underside thereof with an insulation layer and heating elements for the direct heating of the glass ceramic plate. The bonding between the glass ceramic plate and the insulation layer may be improved, whereby the glass ceramic plate comprises a fine structure with structured elements on the underside thereof for an improved bond between the glass ceramic plate and the insulation layer. Said structural elements have a length of between 10 and 250 µm and a height of between 1 and 100 µm and at least partly form undercuts for engaging with the insulation layer.

Description

Keramisches Kochsγstem mit Glaskeramikplatte, Isolationsschicht und HeizelementenCeramic cooking system with glass ceramic plate, insulation layer and heating elements
Die Erfindung betrifft ein keramisches Kochsystem mit einer Glaskeramikplatte, die auf ihrer Unterseite eine Isolationsschicht mit Heizelementen zur direkten Beheizung der Glaskeramikplatte trägt.The invention relates to a ceramic cooking system with a glass ceramic plate, which carries on its underside an insulation layer with heating elements for direct heating of the glass ceramic plate.
Diese keramischen Kochsystem mit einer direkten Beheizung der Glaskeramikplatte zeichnen sich durch hohe Ankochleistung aus und haben gegenüber der Beheizung mittels Strahlungsheizkörper bezüglich Effizienz und Designmöglichkeiten Vorteile.These ceramic cooking systems with direct heating of the glass ceramic plate are characterized by high parboiling performance and have advantages over heating by means of radiant heaters in terms of efficiency and design options.
Keramische Kochsysteme bestehen aus einer ebenen Glaskeramikplatte, auf dessen Oberseite sich das zu beheizende Kochgefäß abgestellt wird. Die Glas- keramikplatten umfassen oxidische und nicht oxidische Keramiken, wie der WOCeramic cooking systems consist of a flat glass ceramic plate, on the top of which the cooking vessel to be heated is placed. The glass ceramic plates include oxidic and non-oxidic ceramics, such as WO
00/1 5005, der FR 2 744 1 16, der EP 0 861 014 A1 und der US 6,037,572 zu entnehmen ist. Zur elektrischen Isolation wird zwischen der Glaskeramikplatte und den Heizelementen eine Isolationsschicht für die elektrische Isolation aufgebracht. Als Material für diese Isolationsschicht eignen sich Stoffe mit hohen elektrischem00/1 5005, FR 2 744 1 16, EP 0 861 014 A1 and US 6,037,572. For electrical insulation, an insulation layer for electrical insulation is applied between the glass ceramic plate and the heating elements. Substances with high electrical are suitable as material for this insulation layer
Isolationswert, vor allem Stoffsysteme AL2O3 - SiO2 - MgO mit Werkstoffen wie Korrund, Mullit, Periklas, Spinell und Cordierit sowie ZrO2 Insulation value, especially AL 2 O 3 - SiO 2 - MgO material systems with materials such as corundum, mullite, periclase, spinel and cordierite as well as ZrO 2
Auf der Isolationsschicht werden die Heizelemente aufgebracht. Als Heizelemente können dünne Schichten vollflächig durch Sputtern oder im CVD-Verfahren vorgesehen werden, wobei insbesondere SnO2 verwendet wird, wie die WO 00/18189 zeigt.The heating elements are applied to the insulation layer. Thin layers can be provided over the entire surface as heating elements by sputtering or in the CVD process, SnO 2 in particular being used, as WO 00/18189 shows.
Eine weitere Möglichkeit besteht in dem Aufbringen von Dickschicht-Leiterbahnen aus Silber-Palladium-Legierungen im Siebdruckverfahren, wie aus der EP 0 861Another possibility is to apply thick-film conductor tracks made of silver-palladium alloys using the screen printing method, as is known from EP 0 861
014 A1 und der EP 0 069 21 8 A1 zu entnehmen ist.014 A1 and EP 0 069 21 8 A1.
Bei derartigen keramischen Kochsystemen bereitet die Aufbringung der Isolationsschicht auf der Unterseite der Glaskeramikplatte Schwierigkeiten, denn diese muss nicht nur sehr fest an der Glaskeramikplatte haften, sie muss auch eine hohe elektrische Isolationswirkung bei guter Wärmeleitfähigkeit besitzen. Dies bedingt in der Regel einen nicht voll befriedigenden Kompromiss.With ceramic cooking systems of this type, the application of the insulation layer on the underside of the glass ceramic plate is difficult, because this not only has to adhere very firmly to the glass ceramic plate, it also has to have a high electrical insulation effect with good thermal conductivity. This usually requires a compromise that is not fully satisfactory.
Es sind als Dickschicht aufgetragene Isolationsschichten nur ein keramisches Kochsystem aus AL2O3, ZrO2, MgO bekannt, die eine hohe Isolationswirkung haben. Da sie einen wesentlich größeren Ausdehnungskoeffizienten als die Glaskeramikplatte aufweisen, ergeben sich gerade während des Aufheizens große Spannungen in der Isolationsschicht, die zu einem teilweisen Lösen der Haftung an der Glaskeramikplatte führen können. Werden für die Isolationsschicht besser an der Glaskeramikplatte haftende und einen niedrigeren Ausdehnungskoeffizienten aufweisende Materialien, wie Mullit, SiO2 oder Cordierit, verwendet, dem muss aus Isolationsgründen eine dickereOnly a ceramic cooking system made of AL 2 O 3 , ZrO 2 , MgO is known as a thick layer of insulating layers, which have a high insulating effect. Since they have a much larger expansion coefficient than the glass ceramic plate, great stresses arise in the insulation layer during heating, which can lead to a partial loosening of the adhesion to the glass ceramic plate. If materials such as mullite, SiO 2 or cordierite, which adhere better to the glass ceramic plate and have a lower expansion coefficient, are used for the insulation layer, a thicker one must be used for insulation reasons
Schicht aufgetragen werden, die dann zudem zu höherem Wärmeübertragungsverlust und Festigkeitseinbußen führt.Layer are applied, which then also leads to higher heat transfer loss and loss of strength.
Es ist Aufgabe der Erfindung, ein keramisches Kochsystem der eingangs er-wähn- ten Art zu schaffen, bei dem eine als Dickschicht ausgebildete Isolation verwendet werden kann, ohne ein teilweises Lösen derselben von der Unterseite der Glaskeramikplatte befürchten und hohen Wärmeübergangsverlust in Kauf nehmen zu müssen.It is an object of the invention to provide a ceramic cooking system of the type mentioned at the outset, in which insulation formed as a thick layer can be used without fear of partial loosening of the same from the underside of the glass ceramic plate and having to accept high heat transfer loss ,
Diese Aufgabe wird nach der Erfindung dadurch gelöst, dass zum besseren Verbund zwischen der Glaskeramikplatte und der Isolationsschicht die Unterseite der Glaskeramikplatte eine Feinstruktur mit Strukturelementen aufweist, die eine Länge zwischen 10 und 250 μm und eine Höhe zwischen 1 und 100 μm besitzen und zumindest teilweise Hinterschnitte zur Verzahnung mit der Isolationsschicht bilden.This object is achieved according to the invention in that for a better bond between the glass ceramic plate and the insulation layer, the underside of the glass ceramic plate has a fine structure with structural elements that have a length between 10 and 250 μm and a height between 1 and 100 μm and at least partially undercuts form for interlocking with the insulation layer.
Durch die Feinstruktur auf der Unterseite der Glaskeramikplatte und die Ausbildung der Strukturelemente wird trotz Vergrößerung der Verbindungsfläche zwischen der Glaskeramikplatte und der Isolationsschicht aufgrund der durch die Strukturelemente erreichten Verzahnung die Haftung auch beim Aufheizen und den dabei auftretenden mechanischen Spannungen wesentlich verbessert, so dass das Auftreten von Luftbrücken durch teilweises Lösen der Isolationsschicht sicher vermieden ist. Nach einer Weiterbildung kann dabei vorgesehen sein, dass die Feinstruktur einer rasterförmigen Noppen-Struktur überlagert ist, die aus Gründen besserer Form- Stabilität der Glaskeramikplatte gewählt wird.Due to the fine structure on the underside of the glass ceramic plate and the formation of the structural elements, despite the increase in the connecting area between the glass ceramic plate and the insulation layer, due to the interlocking achieved by the structural elements, the adhesion during heating and the mechanical stresses that occur in this way is significantly improved, so that the occurrence of Airlifts are safely avoided by partially loosening the insulation layer. According to a further development, it can be provided that the fine structure is superimposed on a grid-shaped knob structure, which is chosen for reasons of better dimensional stability of the glass ceramic plate.
Die Verbesserung der Haftung lässt sich dabei sowohl dadurch erreichen, dass die Strukturelemente der Feinstruktur einstückig mit der Glaskeramikplatte ausgebildet ist, als auch dadurch, dass die Feinstruktur durch getrennte, auf die Glaskeramik- platte aufgebrachte Strukturelement gebildet ist. Dabei ist im letzteren Fall vorgesehen, dass die Strukturelemente aus keramischem Pulver, wie AL2O3, SiO2, MgO, Spinell, bestehen, das optional mit metalloxidischen Zusätzen, wie Ti02 und Alkalien, wie Na, versetzt ist, sowie dass die Strukturelemente spharoidisch, kantige und unregelmäßige Formen aufweisen.The improvement in adhesion can be achieved both in that the structural elements of the fine structure are formed in one piece with the glass ceramic plate and in that the fine structure is formed by separate structural elements applied to the glass ceramic plate. It is provided in the latter case that the structural elements consist of ceramic powder, such as AL 2 O 3 , SiO 2 , MgO, spinel, which is optionally mixed with metal oxide additives, such as Ti0 2 and alkalis, such as Na, and that Structural elements have spheroidal, angular and irregular shapes.
Gute Ergebnisse werden mit einer Ausgestaltung dadurch erreicht, dass die Länge der Strukturelemente vorzugsweise zwischen 40 und 100 μm und die Höhe zwischen 20 und 60 μm gewählt ist.Good results are achieved with an embodiment in that the length of the structural elements is preferably chosen between 40 and 100 μm and the height between 20 and 60 μm.
Die Erfindung wird anhand von in der Zeichnung im Schnitt dargestellten Ausführungsbeispiel näher erläutert. Es zeigen:The invention is explained in more detail using the exemplary embodiment shown in section in the drawing. Show it:
Fig. 1 ein Kochsystem, bei dem die Glaskeramikplatte auf der Unterseite eine einstückige Feinstruktur aufweist,1 shows a cooking system in which the glass ceramic plate has a one-piece fine structure on the underside,
Fig. 2 ein Kochsystem, bei dem die Feinstruktur auf der Unterseite der Glaskeramikplatte durch aufgebrachte Strukturelemente gebildet ist, und Fig. 3 ein Kochsystem, bei dem die Feinstruktur einer Noppen-Struktur auf der Unterseite der Glaskeramikplatte überlagert ist.Fig. 2 shows a cooking system in which the fine structure is formed on the underside of the glass ceramic plate by applied structural elements, and Fig. 3 shows a cooking system in which the fine structure of a knob structure is superimposed on the underside of the glass ceramic plate.
Die Fig. 1 zeigt einen schematischen Teilabschnitt eines keramischen Kochsystems, der in den Abmessungen nicht den tatsächlichen Gegebenheiten entspricht sondern nur zur Erläuterung der Erfindung dient.1 shows a schematic partial section of a ceramic cooking system, the dimensions of which do not correspond to the actual circumstances but only serve to explain the invention.
Die Glaskeramikplatte 10 hat nach wie vor eine ebene Oberseite zum Aufstellen des Kochgefäßes. Die Unterseite 1 1 ist jedoch mit einer Feinstruktur 12 versehen, die durch Strukturelemente 13 gebildet sind, die durch Erhöhungen und/oder Vertiefungen der Oberflächenebene erzeugt werden. Diese Strukturelemente 13 weisen parallel zur Oberseite der Glaskeramiklatte 10 eine Länge L und senkrecht dazu eine Höhe H auf. Dabei gilt die Länge L in allen Richtungen und die Höhe H sowohl für Vertiefungen als auch für Erhöhungen. Die Strukturelemente 1 3 haben unterschiedliche Formen und bilden zumindest teilweise Hin-terschnitte, damit sich die aufgebrachte Isolationsschicht 20 mit der Feinstruktur 12 und damit der Glaskeramikplatte 10 verzahnen kann. Die der Glaskeramikplatte 10 abgekehrteThe glass ceramic plate 10 still has a flat top for setting up the cooking vessel. The underside 11 is, however, provided with a fine structure 12, which is formed by structural elements 13, which are produced by elevations and / or depressions of the surface plane. These structural elements 13 have a length L parallel to the top of the glass ceramic plate 10 and a height H perpendicular thereto. The length L applies in all directions and the height H applies to both depressions and elevations. The structural elements 1 3 have different shapes and at least partially form undercuts so that the applied insulation layer 20 can interlock with the fine structure 12 and thus the glass ceramic plate 10. That facing away from the glass ceramic plate 10
Unterseite der Isolationsschicht 20 trägt das oder die Heizelemente, welche durch aufgebrachte Dickschicht-Leiterbahnen 30 ge-bildet sind.The underside of the insulation layer 20 carries the heating element or elements which are formed by applied thick-layer conductor tracks 30.
Wie am Ausführungsbeispiel nach Fig. 2 gezeigt ist, kann die Feinstruktur 1 2 auch durch getrennte Strukturelemente 13 gebildet werden, die auf der ebenen Unterseite 1 1 der Glaskeramikplatte 10 aufgebracht sind. Auch hier werden unregelmäßige Formen für die Strukturelemente 13 verwendet, die eine teilweise Verzahnung zwischen Isolationsschicht 20 und Feinstruktur 12 und damit Glas-keramik- platte 10 zulassen. Wie anhand des Ausführungsbeispiels nach Fig. 3 gezeigt ist, kann die Feinstruktur 12 auch einer mit einer rasterförmigen Noppen-Struktur 1 5 versehenen Unter- seite 1 1 einer Glaskeramikplatte 10 überlagert werden. Dabei sind im gezeigten Ausführungsbeispiel getrennte Strukturelemente 13 verwendet. Die Noppen- Struktur 1 5 ist einstückig mit der Glaskeramikplatte 10 hergestellt.As shown in the exemplary embodiment according to FIG. 2, the fine structure 1 2 can also be formed by separate structural elements 13, which are applied to the flat underside 11 of the glass ceramic plate 10. Here, too, irregular shapes are used for the structural elements 13, which allow partial interlocking between the insulation layer 20 and the fine structure 12 and thus glass-ceramic plate 10. 3, the fine structure 12 can also be superimposed on the underside 11 of a glass ceramic plate 10 provided with a grid-like knob structure 15. Separate structural elements 13 are used in the exemplary embodiment shown. The knob structure 15 is made in one piece with the glass ceramic plate 10.
Für die Länge L haben sich Abmessungen zwischen 10 und 250 μm und für die Höhe H zwischen 10 und 100 μm als geeignet erwiesen, vorzugsweise werdenDimensions between 10 and 250 μm have proven suitable for the length L and between 10 and 100 μm have proven suitable for the height H, and are preferred
Längen L zwischen 40 und 100 μm und Höhen H zwischen 20 und 60 μm gewählt.Lengths L between 40 and 100 μm and heights H between 20 and 60 μm selected.
Die Formen der Strukturelemente 13 können beliebig sein und sphäroidisch, kantig und unregelmäßig sein.The shapes of the structural elements 13 can be of any type and can be spheroidal, angular and irregular.
Werden getrennte Sturkturelemente 13 auf die Unterseite 1 1 der Glaskeramikplatte 10 aufgebracht, dann werden keramische Pulver, wie AL2O3, Si02, MgO und Spinell bevorzugt, die mit metalloxidischen Zusätzen, wie TiO2 und Alkalien, wie Na, versetzt sind. If separate structure elements 13 are applied to the underside 11 of the glass ceramic plate 10, then ceramic powders such as AL 2 O 3 , SiO 2 , MgO and spinel are preferred, which are mixed with metal oxide additives such as TiO 2 and alkalis such as Na.

Claims

A n s p r ü c h e Expectations
1 . Keramisches Kochsystem mit einer Glaskeramikplatte, die auf ihrer Unterseite eine Isolationsschicht mit Heizelementen zur direkten Beheizung der Glaskeramikplatte trägt, dadurch gekennzeichnet, dass zum besseren Verbund zwischen der Glaskeramikplatte (10) und der Isolationsschicht (20) die Unterseite (1 1 ) der Glaskeramikplatte ( 10) eine Feinstruktur (12) mit Strukturelementen ( 13) aufweist, die eine Länge (L) zwischen 10 und 250 μm und eine Höhe (H) zwischen 1 und 100 μm besitzen und zumindest teilweise Hinterschnitte zur Verzahnung mit der Isolationsschicht (20) bilden.1 . Ceramic cooking system with a glass ceramic plate which has an insulation layer on its underside with heating elements for direct heating of the glass ceramic plate, characterized in that for a better bond between the glass ceramic plate (10) and the insulation layer (20) the underside (1 1) of the glass ceramic plate (10 ) has a fine structure (12) with structural elements (13) which have a length (L) between 10 and 250 μm and a height (H) between 1 and 100 μm and at least partially form undercuts for interlocking with the insulation layer (20).
2. Kochsystem nach Anspruch 1 , dadurch gekennzeichnet, dass die Feinstruktur (1 2) einer rasterförmigen Noppen-Struktur (1 5) überlagert ist.2. Cooking system according to claim 1, characterized in that the fine structure (1 2) of a grid-shaped knob structure (1 5) is superimposed.
3. Kochsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Strukturelemente (1 3) der Feinstruktur (1 2) einstückig mit der Glaskeramikplatte (10) ausgebildet ist. 3. Cooking system according to claim 1 or 2, characterized in that the structural elements (1 3) of the fine structure (1 2) is integrally formed with the glass ceramic plate (10).
4. Kochsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Feinstruktur (12) durch getrennte, auf die Glaskeramikplatte ( 10) aufgebrachte Strukturelement (1 3) gebildet ist.4. Cooking system according to claim 1 or 2, characterized in that the fine structure (12) is formed by separate, on the glass ceramic plate (10) applied structural element (1 3).
5. Kochsystem nach Anspruch 4, dadurch gekennzeichnet, dass die Strukturelemente (13) aus keramischem Pulver, wie AL2O3, SiO2,5. Cooking system according to claim 4, characterized in that the structural elements (13) made of ceramic powder, such as AL 2 O 3 , SiO 2 ,
MgO, Spinell, bestehen.MgO, spinel.
6. Kochsystem nach Anspruch 5, dadurch gekennzeichnet, dass das keramische Pulver mit metalloxidischen Zusätzen, wie TiO2 und6. Cooking system according to claim 5, characterized in that the ceramic powder with metal oxide additives such as TiO 2 and
Alkalien, wie Na, versetzt ist.Alkalis, such as Na, is added.
7. Kochsystem nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Strukturelemente (1 3) sphäroidische, kantige und unregelmäßige7. Cooking system according to one of claims 1 to 6, characterized in that the structural elements (1 3) spheroidal, angular and irregular
Formen aufweisen.Have shapes.
8. Kochsystem nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Länge (L) der Strukturelemente ( 13) vorzugsweise zwischen 40 und 100 μm und die Höhe (H) zwischen 20 und 60 μm gewählt ist. 8. Cooking system according to one of claims 1 to 7, characterized in that the length (L) of the structural elements (13) is preferably between 40 and 100 microns and the height (H) between 20 and 60 microns.
PCT/EP2002/002062 2001-03-06 2002-02-27 Ceramic cooking system with glass ceramic plate, insulation layer and heating elements WO2002078398A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002439602A CA2439602A1 (en) 2001-03-06 2002-02-27 Ceramic cooking system with glass ceramic plate, insulation layer and heating elements
DK02722143T DK1368993T3 (en) 2002-02-27 2002-02-27 Ceramic cooking system with glass ceramic plate, insulation layer and heating elements
AT02722143T ATE285164T1 (en) 2001-03-06 2002-02-27 CERAMIC COOKING SYSTEM WITH GLASS CERAMIC PLATE, INSULATION LAYER AND HEATING ELEMENTS
EP02722143A EP1368993B1 (en) 2001-03-06 2002-02-27 Ceramic cooking system with glass ceramic plate, insulation layer and heating elements
DE50201781T DE50201781D1 (en) 2001-03-06 2002-02-27 CERAMIC COOKING SYSTEM WITH GLASS CERAMIC PLATE, INSULATION LAYER AND HEATING ELEMENTS

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DE10110793.5 2001-03-06
DE10110793A DE10110793A1 (en) 2001-03-06 2001-03-06 Ceramic cooking system with glass ceramic plate, insulation layer and heating elements

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CN (1) CN1493172A (en)
AT (1) ATE285164T1 (en)
CA (1) CA2439602A1 (en)
DE (2) DE10110793A1 (en)
ES (1) ES2233810T3 (en)
WO (1) WO2002078398A1 (en)

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DE10258727A1 (en) * 2002-12-05 2004-06-24 Schott Glas oven
ES2397573B1 (en) * 2010-12-13 2014-01-20 BSH Electrodomésticos España S.A. Cooking Field Plate
ES2399732B1 (en) * 2010-12-13 2014-02-05 BSH Electrodomésticos España S.A. Home Appliance Device

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DE19906963C1 (en) * 1999-02-19 2000-06-15 Schott Glas Glass ceramic plate, has knobbly structure on underside consisting of regular pattern of knobs with defined interval between them

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EP1368993A1 (en) 2003-12-10
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EP1368993B1 (en) 2004-12-15
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ATE285164T1 (en) 2005-01-15
ES2233810T3 (en) 2005-06-16

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