EP0074471A2 - Procédé pour la production des échangeurs de chaleur à plaques céramiques - Google Patents

Procédé pour la production des échangeurs de chaleur à plaques céramiques Download PDF

Info

Publication number
EP0074471A2
EP0074471A2 EP82105905A EP82105905A EP0074471A2 EP 0074471 A2 EP0074471 A2 EP 0074471A2 EP 82105905 A EP82105905 A EP 82105905A EP 82105905 A EP82105905 A EP 82105905A EP 0074471 A2 EP0074471 A2 EP 0074471A2
Authority
EP
European Patent Office
Prior art keywords
foils
heat exchanger
cards
ceramic
laminating
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
EP82105905A
Other languages
German (de)
English (en)
Other versions
EP0074471A3 (en
EP0074471B1 (fr
Inventor
Jürgen Dr. Dipl.-Ing. Heinrich
Heinrich Ing.Grad. Schelter
Stefan Dr. Dipl.-Chem. Schindler
Axel Dr. Dipl.-Ing. Krauth
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.)
Ceramtec GmbH
Original Assignee
Ceramtec 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 Ceramtec GmbH filed Critical Ceramtec GmbH
Priority to AT82105905T priority Critical patent/ATE11698T1/de
Publication of EP0074471A2 publication Critical patent/EP0074471A2/fr
Publication of EP0074471A3 publication Critical patent/EP0074471A3/de
Application granted granted Critical
Publication of EP0074471B1 publication Critical patent/EP0074471B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly

Definitions

  • the invention relates to a method for producing heat exchangers by means of foil technology, in that foils are shaped, stacked, laminated and fired, and to a device for constructing such a heat exchanger from individual foils.
  • a process for the production of heat exchangers from ceramic foils is already known from DE-OS 28 41 571 by stacking foils punched out between two base plates with spacers and additionally milling so-called windows into the top wall. Such a block-shaped heat exchanger is then subjected to a cold or hot lamination process. Although such a process entails higher manufacturing costs than the conventional extrusion of ceramic heat exchangers, very thin walls are obtained. On the other hand, with the extrusion technique, it is not possible to install so-called baffles transverse to the direction of the flow channels. Also handling the Assembly of such heat exchangers from rods and thin-walled foils is very difficult and, moreover, the production method is very labor-intensive.
  • the defects that have occurred in the described method do not allow rational mass production.
  • the heat exchangers often have an inhomogeneous structure after their completion.
  • heat exchangers made of silicon nitride show that the flow behavior is not optimal, since the porous surface of the silicon nitride does not result in smooth flow channels.
  • the invention is therefore based on the object of specifying a method which eliminates the abovementioned shortcomings and also considerably reduces the manufacturing outlay, thereby making it possible to automate the manufacturing process. It is important to maintain an easily editable, error-free, dimensionally accurate and homogeneous ceramic heat exchanger. Furthermore, a suitable device for building a heat exchanger from individual foils is to be created for carrying out the method.
  • the slip consists of a ceramic powder, organic binder, dispersing or thinning agent and, if necessary, plasticizers and other auxiliaries in the form of oils.
  • the main starting point is silicon slip, to which 3 to 10% by weight of cordierite is preferably added.
  • Other ceramic powder composed of cordierite having a composition of 9-20 wt .-% MgO, 30 to 50 wt .-% A l 2 0 3 and 41 to 57 wt .-% Si0. 2 Silicon carbide is also suitable, the mixture consisting of 70 to 92% by weight of SiC and 8 to 30% by weight of C.
  • semiconducting barium titanates can be used if the heat exchanger block is also to be used as a heating element by applying electrical current to it.
  • the organic binder per se is not subject to any particular restriction provided that a good bond to the ceramic powder is guaranteed and the required toughness and dimensional stability are present in the film, if necessary in combination with the plasticizer.
  • Polyvinyl acetates and polyvinyl butyral have proven particularly successful.
  • Water or organic solvents such as ethanol, toluene and trichlorethylene are used as dispersants and diluents.
  • Frame formulations which are particularly suitable according to the invention for the production of the ceramic films are given below, the slip formulations being broken down into ceramic raw materials and binders or solvents:
  • the viscosity of the slip can be influenced in particular by the solvent content. It has also been found that the use of ultrasound in the treatment of the casting slip is particularly advantageous. This treatment gives a casting slip with greater homogeneity, better casting properties and a maximum content of solids, which has a particular effect on the bulk density of the film. In this way, films with a higher packing density and improved mechanical properties can be obtained. Furthermore, it makes sense to provide a vibrating device on the casting belt that compresses the casting slip again or enables a uniform film thickness over the entire range.
  • the ceramic films are brought to their final dimensions after lamination. If thick foils or very high flow channels are required, which go beyond the foil thickness of 0.1 to 1.5 mm, the foils are connected to individual cards with a lamination aid in a pre-lamination process. Various flow channels are then punched out of these foils or cards or the foil is subjected to an embossing process. In the latter case, the ceramic foils are exposed in matrices at 20 to 120 ° C and pressures of 5 to 100 bar, which results in comb-like projections.
  • the punched or embossed cards are then built up by means of the device according to the invention to form a heat exchanger block, with which the individual layers are laminated together with the aid of a laminating press.
  • a press device In the lamination process, a press device is used at pressures of 0.1 to 15 bar, preferably 1 bar and time intervals of 1 to 10 seconds. Normally, work is carried out at room temperature, but temperatures up to 100 ° C. can also be used. In individual cases, the pressure used depends on the organic content and the type of lamination aid.
  • a paste is used, which preferably contains a ceramic filler, or a purely organic adhesive, which is applied by screen printing, spraying or rolling.
  • the use of lamination aids has several advantages. On the one hand, low pressures are made possible during the lamination process, whereby deformation of the flow channels is avoided. Furthermore, the ripple of the foils is compensated and finally the lamination aid effectively reduces the lamination errors.
  • the organic components are then heated up to 40 to 60% of the plastic content, which results in an additional raw strength. This also ensures that the heat exchanger block is easy to machine without the tools smearing through the organic components of the ceramic film.
  • the remaining organic components are then heated and the heat exchanger block sintered between 1200 and 1700 ° C. It may still be necessary to rework the inlet and outlet openings of the flow channels in order to maintain a good connection to the various supply and discharge media.
  • the invention further relates to a device for carrying out the method according to the invention.
  • a device for carrying out the method according to the invention is a combined molding, laminating aid application and laminating device.
  • Films or pre-laminated cards are subjected to a shaping to form the flow channels.
  • the cards are brought to the application device for the laminating aid by means of suction plates which can be moved horizontally and vertically and swiveled by 180 °.
  • the suction plate then swivels from this device to the laminating press and there deposits the differently shaped cards alternately, as a result of which the heat exchanger block is built up.
  • the stack of cards thus obtained is subjected to a pressure.
  • the method enables extensive automation, in particular through the device according to the invention, since in the previous production, due to the individual handling during punching, positioning and laminating, no continuous work process could be carried out.
  • heat exchangers are also obtained which are very homogeneous and show very good contact between the individual layers after sintering.
  • the improved method also results in better quality heat exchangers and so-called baffles can be installed transversely to the flow device of the channels without great effort.
  • the baffles can be freely selected and are no longer dependent on the manufacturing process.
  • Another possibility provides that curved flow channels can be produced. This means that asymmetrical and cylindrical heat exchangers can also be manufactured.
  • heat exchangers can be obtained, which optionally consist of layers of silicon nitride, silicon carbide and cordierite in the form plates or foils are made according to DE-OS 26 31 092.
  • FIG. 1 shows the manufacturing process of a gas / liquid heat exchanger made of silicon nitride.
  • silicon powder with 24% by weight of ethanol, 10% by weight of toluene, 1.5% by weight of Menhaden oil, 8% by weight of polyvinyl butyral and 5% by weight of plasticizer.
  • -% Palatinol and / or Ucon-Oil added to produce the ceramic casting slip.
  • This mixture is ground in a drum mill with A1 2 0 3 balls for 20 hours and the slip is then evacuated.
  • the usual warping of the slip for film production takes place on a steel belt.
  • the slip is added above a casting shoe, the film thickness being determined by an adjustable gap height of 0.2 to 1.5 mm on the casting shoe.
  • the film is then pulled off the steel strip and separated. It has proven to be expedient to construct so-called prelaminates from two to three foils.
  • the individual foils are connected to one another by spraying or by applying a laminating aid.
  • a paste is used which consists, for example, of 65% by weight of silicon and / or cordierite or of mixtures thereof.
  • the paste also contains 20 to 40% by weight of unsaturated alcohols and 3 to 10% by weight of binder which contain plasticizers and polyvinyl butyral.
  • the paste is printed using the screen printing process. At the same time, the unevenness of the surface is compensated for by the solid content of the paste.
  • the paste also dissolves the surface, which later leads to homogeneous connections of the individual layers.
  • the flue gas ducts 3 have a width of 50 mm and the walls 4 have a width of 3 to 7 mm. While a width of 100 mm has been chosen for the punched-out water pockets 5 and provided with baffles 6 perpendicular to the direction of flow, the card thickness here is 2.7 mm.
  • the baffles are particularly intended to ensure that the temperature distribution is uniform in the flow channels.
  • the heat exchanger block is assembled using the device according to the invention, as can be seen in FIG. 3.
  • the suction plate 7 fetches cards 1, which simultaneously serve as covers between the cards 3 and 5 which are later punched out, from a stack of a magazine 8.
  • the suction plate 7 then swivels through 180 ° and brings the card 1 under the screen printing device 9. Here it becomes Laminating aid applied.
  • the suction plate 7 places the card on the lower part 10 of the laminating press 11 and returns to the magazine 8.
  • a new card 1 is then fed to the punch 13. It is useful to have a punch I for the flue gas ducts 3 and the punch II for the water pockets 5 according to FIG. 4, which shows an assembled heat exchanger in which the edges 2 have been removed.
  • the suction plate 7 now takes the punched card 3 and 5, and brings them to the Laminierstoffcited under the screen printing apparatus 9. After the screen printing operation, the suction plate 180 7um pivoted 0 and applied to the card 1 with light pressure. By alternately placing cards 1 on the punched cards 3 and 5, the heat exchanger block is stacked. The heat exchanger block thus finished is then in the Laminating press 11 pressed between the upper 12 and lower part 10, whereby the lamination process begins at the same time.
  • the stacked heat exchanger block after having been removed from the laminating press, is subjected to a temperature treatment at temperatures between 100 and 200 ° C.
  • the organic components especially the plasticizer and the lamination aid, evaporate.
  • the heating process takes one to two days, with 40 to 60% of the organic components being expelled from the heat exchanger block.
  • the heat exchanger block can be machined by milling or sawing, so that it obtains its final dimensions.
  • the remaining organic constituents are then baked out at temperatures between 200 and 300 ° C. over a period of about 2 to 3 days. This measure eliminates the usual pre-sintering or pre-nitriding at 1100 to 1300 ° C, especially with silicon foils.
  • the nitriding is then carried out in a known manner between 1300 and 1400 ° C.
  • the tightness of the finished silicon heat exchanger can be increased by expediently replacing 3 to 10% by weight of silicon with cordierite in the lamination aid. This measure can also take place with the pouring slurry.
  • post-sintering at temperatures between 1300 and 1400 ° C. is necessary, in the presence of oxygen, as is evident from DE-PS 25 44 437.
  • the result of this process is a homogeneous, one-piece heat exchanger that is characterized by uniform strength.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Ceramic Products (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Laminated Bodies (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP82105905A 1981-09-12 1982-07-02 Procédé pour la production des échangeurs de chaleur à plaques céramiques Expired EP0074471B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82105905T ATE11698T1 (de) 1981-09-12 1982-07-02 Verfahren zum herstellen von waermetauschern aus keramischen folien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813136253 DE3136253A1 (de) 1981-09-12 1981-09-12 Verfahren und vorrichtung zum herstellen von waermetauschern aus keramischen folien
DE3136253 1981-09-12

Publications (3)

Publication Number Publication Date
EP0074471A2 true EP0074471A2 (fr) 1983-03-23
EP0074471A3 EP0074471A3 (en) 1983-06-22
EP0074471B1 EP0074471B1 (fr) 1985-02-06

Family

ID=6141507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105905A Expired EP0074471B1 (fr) 1981-09-12 1982-07-02 Procédé pour la production des échangeurs de chaleur à plaques céramiques

Country Status (5)

Country Link
US (1) US4526635A (fr)
EP (1) EP0074471B1 (fr)
JP (1) JPS5860195A (fr)
AT (1) ATE11698T1 (fr)
DE (2) DE3136253A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213378C2 (de) * 1982-04-10 1984-10-11 Pacific Wietz Gmbh + Co Kg, 4600 Dortmund Mehrschichtiger Gleitkörper und Verfahren zu seiner Herstellung
JPS6183897A (ja) * 1984-09-28 1986-04-28 Asahi Glass Co Ltd セラミツクス製の熱交換体
US4838581A (en) * 1985-02-05 1989-06-13 Asahi Glass Company Ltd. Joint structure for a tube support plate and a tube
US4875712A (en) * 1985-02-05 1989-10-24 Asahi Glass Company, Ltd. Joint structure for a tube support plate and a tube
DE3717670A1 (de) * 1986-11-21 1988-06-01 Hoechst Ceram Tec Ag Verfahren zum abdichten keramischer waermetauscher
DE3643750A1 (de) * 1986-12-20 1988-06-30 Hoechst Ag Waermetauschermodul aus gebranntem keramischen material
DE3643749A1 (de) * 1986-12-20 1988-06-30 Hoechst Ag Waermetauschermodul aus gebranntem keramischen material
DE3719606A1 (de) * 1987-06-12 1988-12-22 Hoechst Ceram Tec Ag Verfahren zur silicierung von poroesen formkoerpern aus siliciumcarbid oder siliciumcarbid/kohlenstoff
JPH0670941B2 (ja) * 1988-12-15 1994-09-07 株式会社村田製作所 積層コンデンサの製造方法
US5035961A (en) * 1989-07-05 1991-07-30 Combustion Engineering, Inc. Internal cross-anchoring and reinforcing of multi-layer conductive oxides
DE4022654A1 (de) * 1990-07-17 1992-01-23 Hoechst Ag Karte aus keramischem material zum aufbau von durchlaessigen strukturen
DE4100108C1 (en) * 1991-01-04 1992-04-09 Robert Bosch Gmbh, 7000 Stuttgart, De Joining non-sintered ceramic film to further laminate - involves applying layer contg. solvent for binder of ceramic film to surface to be connected
WO1994002294A1 (fr) * 1992-07-15 1994-02-03 Hoechst Ceramtec Aktiengesellschaft Procede de fabrication de corps crus structures en ceramique
JP4239077B2 (ja) * 2003-08-20 2009-03-18 独立行政法人 日本原子力研究開発機構 高温耐食性セラミックス製コンパクト熱交換器
DE10361346A1 (de) * 2003-12-16 2005-07-14 Deutsches Zentrum für Luft- und Raumfahrt e.V. Platten-Wärmeübertrager, Verfahren zur Herstellung eines Platten-Wärmeübertragers und keramischer Faserverbundwerkstoff, insbesondere für einen Platten-Wärmeübertrager
FR2905754B1 (fr) * 2006-09-12 2008-10-31 Boostec Sa Sa Procede de fabrication d'un dispositif de type echangeur de chaleur en carbure de silicium et dispositif en carbure de silicium realise par le procede
DE102007048013A1 (de) * 2007-09-27 2009-04-02 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zur Herstellung eines keramischen Wärmeübertragers und keramischer Hochtemperatur-Wärmeübertrager
ES2531124B1 (es) * 2013-09-10 2016-01-22 Valeo Térmico, S. A. Intercambiador de calor para gases, en especial de los gases de escape de un motor
US9696097B2 (en) * 2014-08-01 2017-07-04 Applied Materials, Inc. Multi-substrate thermal management apparatus

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358853A (en) * 1965-10-11 1967-12-19 Warner Swasey Co Sheet handling device
FR2165183A5 (fr) * 1971-12-21 1973-08-03 Chausson Usines Sa
GB1418663A (en) * 1972-03-27 1975-12-24 Atomic Energy Authority Uk Refractory structures
US3940301A (en) * 1974-08-01 1976-02-24 Caterpillar Tractor Co. Method of manufacturing an open cellular article
US3943994A (en) * 1972-12-07 1976-03-16 Gte Sylvania Incorporated Ceramic cellular structure having high cell density and method for producing same
US4130160A (en) * 1976-09-27 1978-12-19 Gte Sylvania Incorporated Composite ceramic cellular structure and heat recuperative apparatus incorporating same
DE2807755A1 (de) * 1977-09-26 1979-03-29 Jan Dr Grochol Verfahren zur herstellung eines keramischen kontaktkoerpers
DE2841571A1 (de) * 1978-09-23 1980-04-03 Kernforschungsanlage Juelich Einflutiger keramischer rekuperator und verfahren zu seiner herstellung
US4202660A (en) * 1970-04-22 1980-05-13 Owens-Illinois, Inc. Glass-ceramic article and method of making same
US4230651A (en) * 1977-07-18 1980-10-28 Ford Motor Company Method of fabricating a heat exchanger for Stirling engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1418459A (en) * 1971-12-29 1975-12-17 Atomic Energy Authority Uk Sintered artefacts
US3854186A (en) * 1973-06-14 1974-12-17 Grace W R & Co Method of preparing a heat exchanger
DE2544437C3 (de) * 1975-10-04 1979-04-05 Rosenthal Ag, 8672 Selb Verfahren zur Herstellung von silizhimnitridhaltigen mit einer Selbstglasur Überzogenen Gegenständen
US4156051A (en) * 1975-11-10 1979-05-22 Tokyo Shibaura Electric Co., Ltd. Composite ceramic articles
DE2631092C2 (de) * 1976-07-10 1982-02-04 Rosenthal Technik Ag, 8672 Selb Keramischer Wechselschicht-Wärmetauscher in Modulbauweise
JPS5839799B2 (ja) * 1978-05-02 1983-09-01 日産自動車株式会社 大型ハニカム構造体の製造方法
CA1121332A (fr) * 1978-09-01 1982-04-06 Joseph J. Cleveland Corps ceramique recuperateur de chaleur, et configuration connexe
US4298059A (en) * 1978-09-23 1981-11-03 Rosenthal Technik Ag Heat exchanger and process for its manufacture

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358853A (en) * 1965-10-11 1967-12-19 Warner Swasey Co Sheet handling device
US4202660A (en) * 1970-04-22 1980-05-13 Owens-Illinois, Inc. Glass-ceramic article and method of making same
FR2165183A5 (fr) * 1971-12-21 1973-08-03 Chausson Usines Sa
GB1418663A (en) * 1972-03-27 1975-12-24 Atomic Energy Authority Uk Refractory structures
US3943994A (en) * 1972-12-07 1976-03-16 Gte Sylvania Incorporated Ceramic cellular structure having high cell density and method for producing same
US3940301A (en) * 1974-08-01 1976-02-24 Caterpillar Tractor Co. Method of manufacturing an open cellular article
US4130160A (en) * 1976-09-27 1978-12-19 Gte Sylvania Incorporated Composite ceramic cellular structure and heat recuperative apparatus incorporating same
US4230651A (en) * 1977-07-18 1980-10-28 Ford Motor Company Method of fabricating a heat exchanger for Stirling engine
DE2807755A1 (de) * 1977-09-26 1979-03-29 Jan Dr Grochol Verfahren zur herstellung eines keramischen kontaktkoerpers
DE2841571A1 (de) * 1978-09-23 1980-04-03 Kernforschungsanlage Juelich Einflutiger keramischer rekuperator und verfahren zu seiner herstellung
FR2436956A1 (fr) * 1978-09-23 1980-04-18 Rosenthal Technik Ag Recuperation de chaleur en ceramique, et procede de fabrication d'un tel recuperateur

Also Published As

Publication number Publication date
EP0074471A3 (en) 1983-06-22
JPS5860195A (ja) 1983-04-09
EP0074471B1 (fr) 1985-02-06
JPH0219400B2 (fr) 1990-05-01
DE3136253A1 (de) 1983-03-31
US4526635A (en) 1985-07-02
DE3262215D1 (en) 1985-03-21
ATE11698T1 (de) 1985-02-15

Similar Documents

Publication Publication Date Title
EP0074471B1 (fr) Procédé pour la production des échangeurs de chaleur à plaques céramiques
DE3941346C2 (de) Verfahren und Vorrichtung zur Herstellung von Mehrschichtkondensatoren
DE10256980B4 (de) Herstellverfahren für einen gestapelten keramischen Körper
WO1997040536A1 (fr) Actionneur piezo multicouche monolithique, et son procede de production
DE19757463C2 (de) Verfahren zur schnellen Prototypherstellung aus sinterbarem pulverförmigem Material und Fertigungsvorrichtung unter Verwendung desselben
DE69031839T2 (de) Geschichtete Keramikanordnung und Verfahren zur deren Herstellung
WO1983003651A1 (fr) Corps coulissant, son procede de fabrication et son utilisation
DE2227343B2 (de) Harzmischung, keramische Paste und Verfahren zum Herstellen gesinterter, dielektrischer Keramikstrukturen
DE69309358T2 (de) Verfahren zur Herstellung eines Schaltungssubstrats
DE2451236A1 (de) Verfahren zum herstellen keramischer dialektrika
DE102004026572A1 (de) Herstellungsverfahren für piezoelektrisches Schichtelement
DE3713987A1 (de) Verfahren zur herstellung einer strukturierten keramikfolie bzw. eines aus solchen folien aufgebauten keramikkoerpers
DE2315797B2 (de) Verfahren zur Herstellung von Keramiksubstraten für Dünnschichtschaltungen
CH703727A1 (de) Verfahren zum Herstellen von Blechstapelkörpern.
DE2445086C2 (de) Verfahren zur Herstellung eines für die Herstellung eines Kondensators geeigneten Keramikkörpers
DE3619871C2 (fr)
DE1802687A1 (de) Mit einem Unterdruck beaufschlagbare Unterlage zum Festhalten von Flachmaterialstuecken
DE10251689A1 (de) Verfahren zur Herstellung eines keramischen Laminats
DE2301277A1 (de) Verfahren zum herstellen mehrschichtiger verbindungskonstruktionen, z.b. fuer integrierte halbleiterschaltkreise
EP1273050B1 (fr) Procede et dispositif de fabrication d'actionneurs multicouches
DE19643148C2 (de) Herstellverfahren für keramische Körper mit Mikrostruktur und Verwendungen
DE2737509A1 (de) Verfahren zur herstellung von keramik-kondensatoren
DE2420726B2 (de) Verfahren und vorrichtung zur herstellung von presskoerpern mit schichtweise verschiedener zusammensetzung fuer hochbelastbare elektrische kontakte
DE2717286C3 (de) Verfahren zum Hersteilen einer mehrlagigen Leiterplatte
EP0230562A1 (fr) Procédé de fabrication de membranes piézo-céramiques

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19830520

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 11698

Country of ref document: AT

Date of ref document: 19850215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3262215

Country of ref document: DE

Date of ref document: 19850321

ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: HOECHST CERAMTEC AKTIENGESELLSCHAFT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: HOECHST CERAMTEC AKTIENGESELLSCHAFT

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

BECN Be: change of holder's name

Effective date: 19850206

26N No opposition filed
NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: HOECHST CERAMTEC AKTIENGESELLSCHAFT TE SELB, BONDS

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 82105905.2

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970620

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970922

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980623

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980716

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980717

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19980729

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19980731

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19980813

Year of fee payment: 17

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: HOECHST CERAMTEC AKTIENGESELLSCHAFT TRANSFER- CERAMTEC AG INNOVATIVE CERAMIC ENGINEERING

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990702

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990702

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990731

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990731

BERE Be: lapsed

Owner name: HOECHST CERAMTEC A.G.

Effective date: 19990731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990702

EUG Se: european patent has lapsed

Ref document number: 82105905.2

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20000201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST