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AU601650B2 - Method for coating a portion of the surface of a porous ceramic body - Google Patents
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AU601650B2 - Method for coating a portion of the surface of a porous ceramic body - Google Patents

Method for coating a portion of the surface of a porous ceramic body Download PDF

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Publication number
AU601650B2
AU601650B2 AU26658/88A AU2665888A AU601650B2 AU 601650 B2 AU601650 B2 AU 601650B2 AU 26658/88 A AU26658/88 A AU 26658/88A AU 2665888 A AU2665888 A AU 2665888A AU 601650 B2 AU601650 B2 AU 601650B2
Authority
AU
Australia
Prior art keywords
ceramic
ceramic body
accordina
slip
porous
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.)
Ceased
Application number
AU26658/88A
Other versions
AU2665888A (en
Inventor
Albert Maurer
Tiberiu Mizrah
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.)
Rio Tinto Switzerland AG
Original Assignee
Alusuisse Holdings AG
Schweizerische Aluminium AG
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 Alusuisse Holdings AG, Schweizerische Aluminium AG filed Critical Alusuisse Holdings AG
Publication of AU2665888A publication Critical patent/AU2665888A/en
Application granted granted Critical
Publication of AU601650B2 publication Critical patent/AU601650B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2082—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous
    • B01D39/2086—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous sintered or bonded by inorganic agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2093—Ceramic foam
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063—Preparing or treating the raw materials individually or as batches
    • C04B38/0635—Compounding ingredients
    • C04B38/0645—Burnable, meltable, sublimable materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063—Preparing or treating the raw materials individually or as batches
    • C04B38/0635—Compounding ingredients
    • C04B38/0645—Burnable, meltable, sublimable materials
    • C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
    • C04B41/4511—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application using temporarily supports, e.g. decalcomania transfers or mould surfaces
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
    • C22B9/023—By filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0241—Types of fibres, filaments or particles, self-supporting or supported materials comprising electrically conductive fibres or particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B01D2239/0478—Surface coating material on a layer of the filter
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geology (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Filtering Materials (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Description

AUSTRALIA
Patents Act 601 650 COMPLETE SPECIFICATICO
(ORIGINAL)
Class Int. Class Application Number: Lodged: Complete Specification Lodged: Accepted: Published: Priority t Related Art: Reatd rt APPLICANT'S REFERENCE: Case 1800 Name(s) of Applicant(s): Swiss Aluminium Ltd Address(es) of Applicant(s): CH-8212, Neuhausen am Rheinfall,
SWITZERLAND.
Addrvjs for Service is: PHILLIPS ORMNDE FITZPATRICK Patent and Trade Mark Attorneys 367 Collins Street Melbourne 3000 AUSTRALIA Complete Specification for the invention entitled: ETBOD FOR COATING A PORTION OF THE SURFACE OF A POROUS CERAMIC BODY Our Ref 114654 POF Code: 1526/1526 The following statement is a full description of this invention, including the best method of performing it known to applicant(s): 6003q/1 1- Sr I- 88-390 METHOD FOR COATING A PORTION OF THE SURFACE OF A POROUS CERAMIC BODY The invention relates to a method for coatina a portion of the surface of a porous ceramic body with a three-dimensional network structure comprisina open cells connected to each other, by applying a ceramic layer.
US Patent 3,090,094 describes the manufacture of a porous ceramic body of this kind. For satisfactory operating efficiency of such a ceramic body as a filter element, for example for cleaninq exhaust gases of internal combustion enoines, particularly diesel engines, or for filterina molten metal, an appropriate support for fixina the ceramic body in the f i lter assembly is needed. Ceramic bodies are always very fraoile and break very easily under direct point stress. It is therefore desirable to avoid stresses on the edae of a ceramic body as far as possible, in order to prevent damaae to the delicate ceramic webs. For example, this is accomplished in exhaust catalysts for Otto engines in the case of so-called cannlna of the filter body in a metal housing, by protectina the filter by sheathina with knitted wire fabric and/or ceramic mats aaainst vibrations, displacements and other harmful influences which lead to mechanical stresses.
88-390 The problem of protectina a ceramic body used in this way is also described in U.S. Patent 4,540,535.
Accordina to this, the problem is solved by repeated sprayinq and dryina of the ceramic body with a ceramic slio havina the same ceramic composition as the body, the outer pores of the ceramic body beino closed. In e «t e addition to very intricate handlina, this method has the *a disadvantaae that a areat deal of slip has to be applied a.
in order to close the open pores, and that in this case a substantial proportion of the ceramic body can no lonaer perform its actual function.
a. The inventors therefore set themselves the primary object of providing a method for coatino a portion of the surface of a porous ceramic body with a three-dimensional network structure havina open cells connected to each other, by applyina a ceramic laver, which does not have the above-mentioned disadvantaaes, and yields a sealina and reinforcina surface.
Thn object is extended in particular in connection wiIh the reqeneration of ceramic bodies of this kind used as filters for cleanina exhaust oases of internal combustion enaines, in particular diesel enaines, in that in addition, in case of receneration of the filters by electric resistance heating and/Or ionition, the coatina is intended to serve as an electrical contact.
-2- 88-390 Accordina to the invention, the primary object is achieved by Drovidina a method for coatinq a portion of a surface of i porous ceramic body with a three-dimensional network structure comprisinr open cells connected to each other, by apolyina a ceramic layer, characterized in that an absorbent, plane Smaterial is coated on at least one side with a thin layer of ceramic slip, by which the side containinq ceramic slip is placed on the surface of the unburnt ceramic body to be reinforced and/or sealed, dried, and burnt toaether with the ceramic body.
Advantageous developments of the method according to the invention include carryina out the burnina at a temperature at which the dried ceramic slip on the plane material and the ceramic body become sintered together.
Paper, mattina or other tissue of textile or ceramic fibers may be used as the plane material. The plane material may be provided with a coatina of ceramic slip which is porous resultina in a porous ceramic layer on the ceramic body after burnina. In addition, the plane material may be provided with a coatina of ceramic slip which is not porous resultina in a sealina ceramic layer on the ceramic body after burnina.
Advantaaeously, the proposed method is used for the manufacture of filters for cleaninq exhaust aases of i 88-390 internal combustion enqines, in particular diesel enaines, In the case of molten metal filterina, it is often necessary to offer a filter with a mechanically reinforced rim to the user of a filter of the above kind. It turned out, particularly for this purpose, S r €I that the method accordina to the present invention is suitable for the manufacture of a sealina and reinforcina filter rim, for the resultina filter rim surface comrises no indentations, but is smooth and hence adaots sealinalv to the correspondina seat of the filter assembly, so that no further aids such as heat-resistant ceramic mattina or the like are needed.
Use of the method accordina to the invention in particular for the manufacture of diesel soot filters has similarly advantaaeous effects. Dependinq on the o tvye of filter, a surface whic.h acts only as a reinforcement or only as a seal or serves both purposes can be produced by the method accordina to the invention. The various possibilities can be obtained by the choice of slip which is apolied to the plane material, and/or by the selection of strip material with the desired oroperties. For example, open woven fabric has a reinforcin effect on the surface of the ceramic body without sealina it; the other hand Dapers which is -4- L i 88-390 provided with a continuous thin layer of ceramic slip, which retains its continuity of sealina even after burninq, produces a sealina and reinforcina surface of the ceramic body.
Further advantaaeous characteristics and details of the invention are apparent from the description of a Suniversal embodiment below.
First a sliahtly absorbent paper, mattina or other tissue is cut to the dimensions of the rim of the ceramic body to be reinforced. Then the material used is coated with a thin layer of a ceramic slid by means of a brush or other suitable means. The ceramic slip can be basically any slip such as one containina cordierite, aluminum oxide or mullite; the only condition is that it adheres to the ceramic body.
Preferably, however, the same slip as was used to manufacture the porous ceramic body is selected. The sliqht absorbency of the substrate of paper, mattina or other tissue results in cood, uniform adhesion of the J thin layer of slip. The coated substrate is now aoplied to the filter rim to be reinforced, in such a way that the thin layer of slip bonds to the foam body, which is preferably not predried. During the dryina process, which is advantaceously carried out between about 80 and 100°C, a bond sets up between the sheathed rim of the as -wIA L 1 1 -I-i I-'i ~*li i lli- [ii V 88-390 yet unburnt porous ceramic body and the ceramic slip dried onto it. Particularly when a paper substrate is used, this can easily be removed before subsequent sinter burnina. This measure is not necessary, however, as the substrate is burnt similarly to the polyurethane foam in the manufacture of a porous ceramic body during the sinterina process. After the burnina orocess, usually a sinterinq process at correspondinaly hiah temperatures, a porous ceramic body is obtained, in which a portion of the surface is sealed and/or reinforced by application of a ceramic layer, denendina on the choice of ceramic slip used and substrate material. A body of this kind has the desired mechanical stability of the rim.
If diesel soot filters of the above kind are to be reaenerated by electric resistance heating and/or ignition, there is used a slip which after burnina yields an electrically conductive ceramic layer which serves as an electrical contact. In particular, silicon carbide or preferably titanium diboride or mixtures thereof are suitable as the solids for the slip, for these purposes. Particularly from the mixture, no matter which of the aforementioned chemical compositions they had, it was possible to make electrical contacts intimately bonded to ceramic bodies and durable in use.
-6-

Claims (1)

  1. 88-390 KNPMXXX S X XKIEX Z X The claims defining the invention are as follows: 1. Method for coatina a portion of a surface of a ceramic body w;ith a three-dimensional network structure which comprises: providing a porous ceramic body; coating at least one side of an absorbent, plane material with a layer of ceramic slip; placina the coated side on the surface of the porous ceramic body to form an assembly; and burning the assembly to form a coated ceramic body. 2. Method according to claim 1 wherein said burnin is carried out at a temperature at which the ceramic slip on the plane material and the ceramic body become sintered together. 3. Method accordina to claim 1 wherein 'said Dlane material is selected from the group consistina of paper, mattina, textile and ceramic fibers. 4. Method according to claim 1 wherein the plane material is provided with a coating of ceramic slip which is poroua, resultina in a porous ceramic layer on the ceramic body after burning. 7i L; i- i -ri 88-390 Method according to claim 1 wherein the plane material is provided with a coating of ceramic slid which is not porous, resultina in a sealina ceramic layer on the ceramic body after burnina. 6. Method accordina to claim 1 wherein said ceramic slip contains a material selected from the arouo consistina of cordierite, aluminum oxide, mullite and mixtures thereof. 7. Method accordinq to claim 1 wherein the same ceramic material is used in the ceramic body and in the ceramic slip. 8. Method accordina to claim 1 wherein said assembly is dried before burnina. 9. Method accordina to claim 8 wherein said assembly is dried at a temoerature of from 80-100*C t before burnina. Method accordinq to claim 1 wherein the absorbent, plane material is removed before burnlnq. 1 -8 88-390 11. Method accordina to claim 1 to form a filter for filterina molten metal. 12. Method accordina to claim 1 to form a filter for cleanina exhaust cases of internal combustion enaines. 13. Method accordina to claim 1 wherein said ceramic slip after burnina yields an electrically conductive ceramic layer which serves as an electrically conductive contact durina reqeneration of the filter. 14. Method accordina to claim 1 wherein said porous ceramic body is made of electrically conductive material. Method accordino to claim 1 wherein said ceramic slip contains a material selected from the crouD consistinc of silicon carbide, titanium diboride and mixtures thereof. 16. Method accordina to claim 1 wherein said ceramic body contains a material selected from the oroup consistina of silicon carbide, titanium diboride and mixtures thereof. DATED: 5 December, 1988 PHILLIPS ORNONDE FITZPATRICK Attorneys for; SWISS ALUMINIUM LTD. lip
AU26658/88A 1987-12-09 1988-12-07 Method for coating a portion of the surface of a porous ceramic body Ceased AU601650B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4808/87 1987-12-09
CH480887 1987-12-09

Publications (2)

Publication Number Publication Date
AU2665888A AU2665888A (en) 1989-06-15
AU601650B2 true AU601650B2 (en) 1990-09-13

Family

ID=4282903

Family Applications (1)

Application Number Title Priority Date Filing Date
AU26658/88A Ceased AU601650B2 (en) 1987-12-09 1988-12-07 Method for coating a portion of the surface of a porous ceramic body

Country Status (5)

Country Link
EP (1) EP0320457A1 (en)
JP (1) JPH01201089A (en)
AU (1) AU601650B2 (en)
BR (1) BR8806491A (en)
DK (1) DK683188A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628947B2 (en) * 1987-03-16 1994-04-20 品川白煉瓦株式会社 Double-layer heat-resistant plate for tool bricks
JP4518808B2 (en) * 2004-02-09 2010-08-04 Ｔｏｗａ株式会社 Conductive porous material, resin molding die made of the material, and method for producing the material
DE102004051376A1 (en) * 2004-09-13 2006-03-30 Matthias Mangold Manufacturing process for an exhaust gas cleaner and exhaust gas cleaner
JP6068182B2 (en) * 2012-03-29 2017-01-25 日本碍子株式会社 Manufacturing method of honeycomb structure
CN104668495B (en) * 2014-12-26 2019-02-15 芜湖市民泰铜业有限责任公司 A kind of chemical filtering method of refining of non-ferrous metal

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5130556B2 (en) * 1971-09-03 1976-09-01
FR2246517A1 (en) * 1973-10-03 1975-05-02 Morganite Ceramic Fibres Ltd Ceramic paper element - for treatment of eg exhaust gases or other hot fluids
JPS4931714A (en) * 1972-07-21 1974-03-22
US4396565A (en) * 1980-08-21 1983-08-02 Nippon Soken, Inc. Method for producing a filter
US4436538A (en) * 1981-04-22 1984-03-13 Nippon Soken, Inc. Filter for cleaning exhaust gases from diesel engine
DE3140980C1 (en) * 1981-10-15 1983-04-07 Gail AG, 6300 Gießen Process and device for decorating fired or unfired strands of ceramic mass
JPS61215278A (en) * 1985-03-15 1986-09-25 株式会社　豪勇 Manufacture of ceramics with porous surface layer
DE3529684A1 (en) * 1985-08-20 1987-02-26 Wengenrodt Fa Soot filter for diesel engines
DE3704930A1 (en) * 1987-02-17 1988-04-28 Daimler Benz Ag Ceramic soot burn-off filter for diesel engines with an ignition device

Also Published As

Publication number Publication date
DK683188A (en) 1989-06-10
DK683188D0 (en) 1988-12-08
EP0320457A1 (en) 1989-06-14
JPH01201089A (en) 1989-08-14
BR8806491A (en) 1989-08-22
AU2665888A (en) 1989-06-15

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