CA2031087A1 - Refractory ceramic moulding and a method of producing it - Google Patents
Refractory ceramic moulding and a method of producing itInfo
- Publication number
- CA2031087A1 CA2031087A1 CA002031087A CA2031087A CA2031087A1 CA 2031087 A1 CA2031087 A1 CA 2031087A1 CA 002031087 A CA002031087 A CA 002031087A CA 2031087 A CA2031087 A CA 2031087A CA 2031087 A1 CA2031087 A1 CA 2031087A1
- Authority
- CA
- Canada
- Prior art keywords
- moulding
- slip
- impregnation
- proviso
- refractory ceramic
- 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.)
- Abandoned
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000011214 refractory ceramic Substances 0.000 title claims abstract description 13
- 239000011148 porous material Substances 0.000 claims abstract description 25
- 238000005470 impregnation Methods 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000009974 thixotropic effect Effects 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 229920000609 methyl cellulose Polymers 0.000 claims description 3
- 239000001923 methylcellulose Substances 0.000 claims description 3
- 235000010981 methylcellulose Nutrition 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 2
- 238000000137 annealing Methods 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 239000011159 matrix material Substances 0.000 claims 1
- 229920003986 novolac Polymers 0.000 claims 1
- 239000002893 slag Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
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
-
- 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
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic 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
- 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
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/0012—Thixotropic mixtures
Abstract
ABSTRACT
The invention relates to a refractory ceramic moulding having an impregnation which at least partially fills the open pore volume and a method of producing it.
The invention relates to a refractory ceramic moulding having an impregnation which at least partially fills the open pore volume and a method of producing it.
Description
-` 2~3~0~7 The invention relates to a refractory ceramic moulding having an impregnation which at least partially fills the open pore volume.
Impregnation with petroleum products such as tar or pitch have long been known. It serves primarily to increase the resistance of the refractory ceramic products in question to infiltration or resistance to agressive slag. In order to carry out the impregnation, the impregnation medium is heated beyond its melting point by a heating apparatus to obtain a specific vi,scosity so that the pore system can subsequently be effectively filled with pitch or tar by a vacuum/pressure method. ~
The disadvantages of this are, on the one hand, the -impregnation temperatures needed and the subsequent tempering of the impregnated mouldings at above 300C to eliminate volatile constituents. Furthermore, the volatile constituents constitute a major polluting factor.
A method of impregnating ceramic chimney pots is known from German Patent 3704020, using a silicon impregnating agent to ` which methyl cellulose has been added, the impregnatir.g agent being introduced into the open pore volume of the chimney pot by a process of immersion which is only selective from the outside to a depth of penetration of a few millimetres.
Apart from the fact that silicon impregnation for refractory 20310~7 _ - 2 -ceramic par~s such as are used in secondary meta]lurgy, for example, does not give adequate temperature resistance the selective filling of the pores would wash out in the short or long term and the components would then be exposed once more to the direct action of slag for example.
The aim of the invention is therefore to provide a possible means of impregnating refractory ceramic mouldings having open pores, which is not only easier than the known tar and/or pitch impregnation but at the same time will cause less damage to the environment.
The invention is based on the knowledge that the industrial engineering process hither to used in the art (liquidification of an impregnating agent in order to introduce it into the open pores and then harden the impregnating agent in the pores) can be achieved not only by the use of temperature control but also by a totally different, i.e. mechanical/physical method. - -A slip having thixotropic properties can, in fact, be changed into a more!or less viscous condition ~ in the cold state~ - like heated pitch, for example. Depending on the choice of the components for the slipj its viscosity can be lowered to such a degree that it will fill the open pores more or less completely and, after a suitable mechanical/physical agitator unit has been switched off -the slip will solidify again as a result of its thixotropic properties and reliably seal the pores.
The thixotropic slip will be selected on the basis of the following criteria:
- The particle size of the solid component of the slip must be adapted to the size of the pores which are to be filled, i.e. it must be smaller. In the preferred rangej the average particle size of the solid component of the slip should be at most 1/5 and ~-preferably at most 1/10 of the average diameter of the open pores of the moulding. The finer the slip , . , ~ , .... . . . . .
, . . , . , , .. : .......... .
' , , : ',, ' ':,' ' '' ;. ''. ''. : , , -.. . . .
"", , , , , ", , , " , ~ "
,, , ~ : : ' ., 2~310~7 , ~ ~
ma~erial, ~he more completely it is able Lo fill even small pores. It is therefore proposed, in a preferred embodiment, that the particle size of the s]ip particles should be adjusted to be less than 1/10 of the average pore diameter. Thus, with an average pore diameter of 30 microns, for example, the solid component would then have a particle size of less than 3 microns.
The solid component is preferably a ceramic component which itself has a high fire resistance. When a basic product is impregnated the filling material will be a basic one and when an acidic product is filled the slip component will be acidic. Micronised corundum or finally divided magnesite may be mentioned by way of example. Of course, amphoteric substances may also be used.
For the preparation of the slip this will contain, in addition to the solid component, a framework forming and/or liquid component which is preferably a resin, e.g. a phenolic resin. The resin simultaneously introduces a carbon component into the slip which will crack when the impregnated moulding is subsequently heat treated at 150 to 200 ~, for example, so as to form a carbon framework for the refractory ceramic particles which will have the effect of further increasing the stability of the impregnating medium.
The most general embodiment of the invention is described by the feature of claims 1 and 7.
The solid content of the impregnating agent should be at 30 least 40% by weight. The higher this content, the greater the level of filling of the pores.
The slip preferably contains an additive to reinforce the thixotropic properties. Such additives includej for --example, methyl cellulose as well as other wetting agents such as alkyl-aryl-polyoxyethanol.
, . . ~ . - . .
- ' ~ 'I ' ' " '' '' " ~ " ' " ' ' '' " . " ' ' " " " ' ' .
.
, ~ , , . . . .
2~3~ 0~7 The proposal according to the invention has a number of advantages, namely:
- The impregnation may be carried out ~in the cold state~, i.e. at room temperature, for example. This will save the energy costs which are necessarily incurred, for example, by the melting of tar and pitch.
- The impregnating agent may contain highly refractory ceramic components which have better heat properties and better resistant to infiltration than tar or pitch. -- There is absolutely no need for the tempering which is necessary after impregnation according to the prior art in order to evaporate any volatile components. In any case, the products are dried at temperatures not exceeding 200C in order to expell the liquid components or promote the carbonising of the carbon-contain~ing component so as to form a stabilising carbon framework. However, this process could also be carried out ~in situ~ during subsequent use.
- The impregnating method proposed does not produce any environmentally harmful emissions. -The mechanicallphysical agitator means envisaged for --liquifying the thixotropic slip may for example consist of mechanical vibrators or ultrasound equipment. Thus, the products to be impregnated might be placed, for example, in a vessel filled with the slip. Subsequently, either the whole apparatus is vibrated or the slip is acted upon by ultrasound equipment so that in either case the thixotropic structure of the slip is broken down and the slip is able to penetrate into the open pores. The impregnating process may ~ i !:
be additionally aided by a pressure/vacuum device such as is already known in the art.
':' "' ,i' . ~ ~, ' ',' " ' ,'' '" ': ,''," '. ; ' '', '''', '" ;', ,',':
2~3~87 Further feat.ures of t:he invention will become apparent from the features of the sub-claims and the other documents of the application.
The invention can be applied to all types of refractory products, for example in the field of sliding plates, ladle bricksj bricks for the slag area of metallurgical vessels, tank blocks used in glass manufacturing, etc.
, . , , , ,, , ' ~
, ,~,',. ,'' -, ':. ' ''' ,, '.: ' , ' :' ' ' , . .' ' " .: ' ,; ' ' : ' ' ' : . ,
Impregnation with petroleum products such as tar or pitch have long been known. It serves primarily to increase the resistance of the refractory ceramic products in question to infiltration or resistance to agressive slag. In order to carry out the impregnation, the impregnation medium is heated beyond its melting point by a heating apparatus to obtain a specific vi,scosity so that the pore system can subsequently be effectively filled with pitch or tar by a vacuum/pressure method. ~
The disadvantages of this are, on the one hand, the -impregnation temperatures needed and the subsequent tempering of the impregnated mouldings at above 300C to eliminate volatile constituents. Furthermore, the volatile constituents constitute a major polluting factor.
A method of impregnating ceramic chimney pots is known from German Patent 3704020, using a silicon impregnating agent to ` which methyl cellulose has been added, the impregnatir.g agent being introduced into the open pore volume of the chimney pot by a process of immersion which is only selective from the outside to a depth of penetration of a few millimetres.
Apart from the fact that silicon impregnation for refractory 20310~7 _ - 2 -ceramic par~s such as are used in secondary meta]lurgy, for example, does not give adequate temperature resistance the selective filling of the pores would wash out in the short or long term and the components would then be exposed once more to the direct action of slag for example.
The aim of the invention is therefore to provide a possible means of impregnating refractory ceramic mouldings having open pores, which is not only easier than the known tar and/or pitch impregnation but at the same time will cause less damage to the environment.
The invention is based on the knowledge that the industrial engineering process hither to used in the art (liquidification of an impregnating agent in order to introduce it into the open pores and then harden the impregnating agent in the pores) can be achieved not only by the use of temperature control but also by a totally different, i.e. mechanical/physical method. - -A slip having thixotropic properties can, in fact, be changed into a more!or less viscous condition ~ in the cold state~ - like heated pitch, for example. Depending on the choice of the components for the slipj its viscosity can be lowered to such a degree that it will fill the open pores more or less completely and, after a suitable mechanical/physical agitator unit has been switched off -the slip will solidify again as a result of its thixotropic properties and reliably seal the pores.
The thixotropic slip will be selected on the basis of the following criteria:
- The particle size of the solid component of the slip must be adapted to the size of the pores which are to be filled, i.e. it must be smaller. In the preferred rangej the average particle size of the solid component of the slip should be at most 1/5 and ~-preferably at most 1/10 of the average diameter of the open pores of the moulding. The finer the slip , . , ~ , .... . . . . .
, . . , . , , .. : .......... .
' , , : ',, ' ':,' ' '' ;. ''. ''. : , , -.. . . .
"", , , , , ", , , " , ~ "
,, , ~ : : ' ., 2~310~7 , ~ ~
ma~erial, ~he more completely it is able Lo fill even small pores. It is therefore proposed, in a preferred embodiment, that the particle size of the s]ip particles should be adjusted to be less than 1/10 of the average pore diameter. Thus, with an average pore diameter of 30 microns, for example, the solid component would then have a particle size of less than 3 microns.
The solid component is preferably a ceramic component which itself has a high fire resistance. When a basic product is impregnated the filling material will be a basic one and when an acidic product is filled the slip component will be acidic. Micronised corundum or finally divided magnesite may be mentioned by way of example. Of course, amphoteric substances may also be used.
For the preparation of the slip this will contain, in addition to the solid component, a framework forming and/or liquid component which is preferably a resin, e.g. a phenolic resin. The resin simultaneously introduces a carbon component into the slip which will crack when the impregnated moulding is subsequently heat treated at 150 to 200 ~, for example, so as to form a carbon framework for the refractory ceramic particles which will have the effect of further increasing the stability of the impregnating medium.
The most general embodiment of the invention is described by the feature of claims 1 and 7.
The solid content of the impregnating agent should be at 30 least 40% by weight. The higher this content, the greater the level of filling of the pores.
The slip preferably contains an additive to reinforce the thixotropic properties. Such additives includej for --example, methyl cellulose as well as other wetting agents such as alkyl-aryl-polyoxyethanol.
, . . ~ . - . .
- ' ~ 'I ' ' " '' '' " ~ " ' " ' ' '' " . " ' ' " " " ' ' .
.
, ~ , , . . . .
2~3~ 0~7 The proposal according to the invention has a number of advantages, namely:
- The impregnation may be carried out ~in the cold state~, i.e. at room temperature, for example. This will save the energy costs which are necessarily incurred, for example, by the melting of tar and pitch.
- The impregnating agent may contain highly refractory ceramic components which have better heat properties and better resistant to infiltration than tar or pitch. -- There is absolutely no need for the tempering which is necessary after impregnation according to the prior art in order to evaporate any volatile components. In any case, the products are dried at temperatures not exceeding 200C in order to expell the liquid components or promote the carbonising of the carbon-contain~ing component so as to form a stabilising carbon framework. However, this process could also be carried out ~in situ~ during subsequent use.
- The impregnating method proposed does not produce any environmentally harmful emissions. -The mechanicallphysical agitator means envisaged for --liquifying the thixotropic slip may for example consist of mechanical vibrators or ultrasound equipment. Thus, the products to be impregnated might be placed, for example, in a vessel filled with the slip. Subsequently, either the whole apparatus is vibrated or the slip is acted upon by ultrasound equipment so that in either case the thixotropic structure of the slip is broken down and the slip is able to penetrate into the open pores. The impregnating process may ~ i !:
be additionally aided by a pressure/vacuum device such as is already known in the art.
':' "' ,i' . ~ ~, ' ',' " ' ,'' '" ': ,''," '. ; ' '', '''', '" ;', ,',':
2~3~87 Further feat.ures of t:he invention will become apparent from the features of the sub-claims and the other documents of the application.
The invention can be applied to all types of refractory products, for example in the field of sliding plates, ladle bricksj bricks for the slag area of metallurgical vessels, tank blocks used in glass manufacturing, etc.
, . , , , ,, , ' ~
, ,~,',. ,'' -, ':. ' ''' ,, '.: ' , ' :' ' ' , . .' ' " .: ' ,; ' ' : ' ' ' : . ,
Claims (14)
1. Refractory ceramic moulding having an impregnation which at least partially fills the open pore volume, characterised in that the impregnation consists of a finely divided refractory ceramic matrix material and a C-containing and/or ceramic component serving as a frame work between the refractory ceramic particles.
2. Moulding according to claim 1, characterised in that the average particle size of the solid part of the impregnation amounts to at most 1/5 of the average diameter of the open pores of the moulding.
3. Moulding according to claim 2, characterised in that the average particle size of the solid part of the impregnation amounts to not more than 1/10 of the average diameter of the open pores of the moulding.
4. Moulding according to one of claims 1 to 3, characterised in that the maximum particle size of the solid part of the impregnation is 3µm.
5. Moulding according to one of claims 1 to 4, characterised in that the C-containing component consists of a resin, for example a phenolic resin or a novolak resin.
6. Moulding according to one of claims 1 to 5, characterised in that the refractory component is basic when used as an impregnating ingredient for a basic moulding or acidic when used as an impregnating ingredient for an acidic moulding.
7. A method of impreqnating a refractory ceramic moulding with open pores having the following features:
7.1 A slip with thixotropic properties based on a finely divided refractory ceramic material is liquidified using a mechanical and/or physical agitator unit and introduced into the open pore volume of the moulding, optionally with the application of pressure and/or vacuum, 7.2 after a given filling level is reached the agitator unit is switched off and at the same time the impregnating agent hardens in the pores, 7.3 the moulding filled in this way is then tempered with elimination of the liquid content from the impregnation.
7.1 A slip with thixotropic properties based on a finely divided refractory ceramic material is liquidified using a mechanical and/or physical agitator unit and introduced into the open pore volume of the moulding, optionally with the application of pressure and/or vacuum, 7.2 after a given filling level is reached the agitator unit is switched off and at the same time the impregnating agent hardens in the pores, 7.3 the moulding filled in this way is then tempered with elimination of the liquid content from the impregnation.
8. A method according to claim 7, with the proviso that the slip used is one which contains, in addition to the refractory ceramic component, a carbon-containing component such as a resin.
9. Method according to claim 7 or 8, characterised in that the annealing according to feature 7.3 of claim 7 is carried out at temperatures at which the resin cracks to form a carbon framework for the refractory component.
10. Method according to one of claims 7 to 9, with the proviso that a slip is used having a solids content of at least 40% by weight.
11. Method according to one of claims 7 to 10, with the proviso that a slip is used the solids content of which has a maximum particle size of 1/5 of the average pore diameter of the moulding.
12. Method according to claim 11, with the proviso that a slip is used, the solids content of which has a maximum particle size of 1/10 of the average pore diameter of the moulding.
13. Method according to one of claims 7 to 12, with the proviso that a slip is used which contains a thixotropising agent.
14. Method according to claim 13, with the proviso that a methyl cellulose is used as the thixotropising agent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4001180A DE4001180C1 (en) | 1990-01-17 | 1990-01-17 | Refractory ceramic prod. - impregnated with thixotropic slurry including methyl cellulose |
| DEP4001180.1 | 1990-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2031087A1 true CA2031087A1 (en) | 1991-07-18 |
Family
ID=6398233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002031087A Abandoned CA2031087A1 (en) | 1990-01-17 | 1990-11-29 | Refractory ceramic moulding and a method of producing it |
Country Status (9)
| Country | Link |
|---|---|
| BE (1) | BE1004335A3 (en) |
| CA (1) | CA2031087A1 (en) |
| DE (1) | DE4001180C1 (en) |
| ES (1) | ES2030355A6 (en) |
| FR (1) | FR2657604A1 (en) |
| GB (1) | GB9022839D0 (en) |
| IT (1) | IT1246051B (en) |
| LU (1) | LU87823A1 (en) |
| SE (1) | SE9003469L (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19621638C2 (en) * | 1996-05-30 | 2002-06-27 | Fraunhofer Ges Forschung | Open cell foam ceramic with high strength and process for its production |
| DE19735495C2 (en) * | 1997-08-16 | 1999-11-04 | Veitsch Radex Ag | Fireproof ceramic molding |
| US6572927B1 (en) * | 1998-06-29 | 2003-06-03 | Gerd Pleyers | Method for sealing porous building materials and building components |
| DE10013406B4 (en) * | 2000-03-17 | 2007-01-04 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Process for the production of moldings from a composite material and use of the moldings |
| DE10035728C2 (en) * | 2000-07-22 | 2003-08-28 | Veitsch Radex Gmbh Wien | Use of a fired, fireproof ceramic molding |
| EP2913318A1 (en) * | 2014-02-28 | 2015-09-02 | JENOPTIK Katasorb GmbH | High efficiency process for coating particles on a substrate |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2749254A (en) * | 1952-04-22 | 1956-06-05 | Battelle Development Corp | Protective coating method |
| US3671302A (en) * | 1967-10-30 | 1972-06-20 | Dresser Ind | Impregnating porous ceramics with noncolloidal solids |
| GB1339674A (en) * | 1971-03-11 | 1973-12-05 | Bendix Corp | Coating for protecting a carbon substrate and method for applying said coating |
| JPS5716958B2 (en) * | 1974-06-25 | 1982-04-08 | ||
| JPS51141777A (en) * | 1975-06-02 | 1976-12-06 | Nitsukuu Kogyo Kk | An ultrasonic impregnation process |
| GB1569474A (en) * | 1976-03-26 | 1980-06-18 | Centre Rech Metallurgique | Method of the quality of refractory bricks |
| FR2575396B2 (en) * | 1977-04-12 | 1987-04-30 | Commissariat Energie Atomique | PROCESS FOR PRODUCING POROUS AND PERMEABLE MINERAL MEMBRANES |
| US4187344A (en) * | 1978-09-27 | 1980-02-05 | Norton Company | Protective silicon nitride or silicon oxynitride coating for porous refractories |
| DE3306028A1 (en) * | 1983-02-22 | 1984-08-23 | Sigri Elektrographit Gmbh, 8901 Meitingen | Process for producing a carbon block for aluminium electrolysis cells |
| CS246181B1 (en) * | 1984-12-05 | 1986-10-16 | Lumir Bula | Two-layer coating of heat stressed ceramic parts |
| JPH0781103B2 (en) * | 1986-01-17 | 1995-08-30 | 日本インシュレーション株式会社 | Fireproof paint |
| FR2600266B1 (en) * | 1986-06-19 | 1990-08-24 | Lorraine Carbone | PROCESS FOR MANUFACTURING A POROUS MINERAL MEMBRANE ON A MINERAL SUPPORT |
| WO1988002742A1 (en) * | 1986-10-17 | 1988-04-21 | Washington Research Foundation | Method for producing a surface-toughened ceramic composite |
| DE3704020C1 (en) * | 1987-02-10 | 1988-10-27 | Didier Werke Ag | Process for impregnating ceramic chimney stacks (pipes) and chimney stack produced by this process |
-
1990
- 1990-01-17 DE DE4001180A patent/DE4001180C1/en not_active Expired - Fee Related
- 1990-10-17 LU LU87823A patent/LU87823A1/en unknown
- 1990-10-19 GB GB909022839A patent/GB9022839D0/en active Pending
- 1990-10-31 SE SE9003469A patent/SE9003469L/en not_active Application Discontinuation
- 1990-11-29 CA CA002031087A patent/CA2031087A1/en not_active Abandoned
- 1990-12-21 IT IT02251790A patent/IT1246051B/en active IP Right Grant
-
1991
- 1991-01-08 ES ES9100036A patent/ES2030355A6/en not_active Expired - Fee Related
- 1991-01-09 BE BE9100018A patent/BE1004335A3/en not_active IP Right Cessation
- 1991-01-14 FR FR9100317A patent/FR2657604A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB9022839D0 (en) | 1990-12-05 |
| LU87823A1 (en) | 1991-10-08 |
| SE9003469L (en) | 1991-07-18 |
| FR2657604A1 (en) | 1991-08-02 |
| IT9022517A0 (en) | 1990-12-21 |
| BE1004335A3 (en) | 1992-11-03 |
| IT1246051B (en) | 1994-11-07 |
| SE9003469D0 (en) | 1990-10-31 |
| IT9022517A1 (en) | 1992-06-21 |
| DE4001180C1 (en) | 1990-11-22 |
| ES2030355A6 (en) | 1992-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |