GB2307909A - Glazed ceramic fibre materials - Google Patents
Glazed ceramic fibre materials Download PDFInfo
- Publication number
- GB2307909A GB2307909A GB9625426A GB9625426A GB2307909A GB 2307909 A GB2307909 A GB 2307909A GB 9625426 A GB9625426 A GB 9625426A GB 9625426 A GB9625426 A GB 9625426A GB 2307909 A GB2307909 A GB 2307909A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ceramic
- glaze
- ceramic fibre
- fibre materials
- vacuum
- 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
Links
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
- C04B41/5022—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 vitreous 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
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B1/00—Stoves or ranges
- F24B1/18—Stoves with open fires, e.g. fireplaces
- F24B1/191—Component parts; Accessories
- F24B1/198—Surrounds-fronts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The surface of a body of low density ceramic fibre material has a ceramic glaze applied thereto. Before application of the glaze, the surface is consolidated, e.g. by vacuum-forming and/or by the application of a coating of a colloidal silicate binder, which may also partially permeate the ceramic body. The body may constitute part of fireplace surround.
Description
CERAMIC MATERIALS
The present invention relates to ceramic materials and more particularly to a method of treating low density ceramic fibre materials.
The present invention seeks to provide an improved ceramic material.
According to the present invention there is provided a method of treating a body of low density ceramic fibre material comprising applying a ceramic glaze to a surface region thereof.
The surface region of the ceramic fibre material is preferably vacuum-formed or otherwise consolidated, before the glaze is applied. The consolidation may alternatively or additionally comprise applying a coating of a colloidal silicate binder, which may also be employed in the previous vacuum forming process. In preferred methods, the coating material also partially permeates the ceramic body.
It is known to apply glaze to conventional high density ceramic materials, such as pottery. However, the person skilled in the art would not expect that a glaze could be applied and fused onto a lightweight ceramic fibre material without deforming the surface thereof. Indeed, experience has shown that if molten glaze is dripped vertically onto some unconsolidated ceramic fibre materials, holes are formed therein.
Ceramic fibre is used almost exclusively for its thermal insulation properties which derive from its low bulk density. The material may be manufactured by blowing an alumino-silicate substance or clay at a high temperature to form fibres, which are then compressed by a vacuum method of ambient temperature, with a binder.
Vacuum forming is a technique commonly used to manufacture rigid, shaped objects which consist primarily of ceramic fibre. The method often involves sucking the fluid (normally water with various deflocculants and binding agents) through a porous surface such as a flne stainless steel mesh upon which the solid constituents of the slurry (ceramic fibre with or without various mineral fillers such as clay) are deposited. A colloidal silicate binder is usually employed in the vacuum forming process and also acts as a hardener.
Once the desired thickness of solids have been built up on the porous surface, the piece is removed from the slurry, and detached from the porous surface. It is then dried, and heated to a temperature suited to the organic and/or inorganic binders used which impart the desired strength to the finished piece.
Many of the applications of vacuum formed ceramic fibre (VFCF) are industrial, particularly in high temperature environments.
A preferred embodiment of the present invention involves coating VFCF with a colloidal silicate hardener/binder and then a ceramic glaze and then firing the piece to a suitable temperature which fuses the glaze, and on cooling both imparts improved strength to the outer surface of the material, and provides an impervious, decorative finish. The colloidal silicate material coating process involves dipping the VFCF article in a tank, or application by hand or spraying. The colloidal silicate material serves to facilitate a high quality glaze; it is believed that this is achieved by virtue of a reaction between the colloidal silicate and ceramic glaze layers. A wide range of ceramic glazes may be employed, preferably with a firing temperature in the range 900"C to 1300"C and most preferably approximately 1000 C.
As outlined above, ceramic glaze is normally only applied to dense materials - it is completely unexpected that a glaze could be fused onto a lightweight, ceramic fibre - containing body without fusing the body and deforming its surface. Glaze often drips off dense pieces being fired in our kilns onto unconsolidated ceramic fibre lining the hearth (bottom) of the kiln, and the drips form a hole in the fibre.
Glaze reacts with the body it is applied to on firing, forming a boundary layer containing dissolved or reacted body components which normally have a higher melting point than the glaze. At the firing temperature used the boundary layer becomes sufficiently viscous to slow down further reaction between the glaze and the body, and when the kiln temperature is reduced and the object being fired cools down, the boundary layer, and the glaze solidify.
If a surface of a body consists of a very open structure, with a large proportion of voids, for the glaze to dissolve enough body material to form a stable boundary layer, a substantial volume of the body will be consumed, leading to visible deformation of the outer skin of the body.
This embodiment of the present invention relies on the consolidation of the ceramic fibre at least superficially by, for example, vacuum forming and/or the use of fillers and/or binders to provide a surface sufficiently resistant to the dissolution of the fibre by the molten glaze for a good undistorted glaze surface to be formed.
So-called "engobes" may be used, which assist the bonding of the glaze material and the base ceramic material.
Materials according to the present invention are preferably used in fireplace surrounds, but can also be used in any situation in which a ceramic product needs to be glazed.
Claims (9)
1. A method of treating a body of low density ceramic fibre material comprising applying a ceramic glaze to a surface region thereof.
2. A method according to claim 1, wherein the surface region is consolidated before the glaze is applied.
3. A method according to claim 2, wherein the consolidation comprises vacuumforming.
4. A method according to claim 2 or 3, wherein the consolidation comprises applying a coating of a colloidal silicate binder.
5. A method according to claims 3 and 4, wherein the binder is also employed in the vacuum-forming process.
6. A method of treatment substantially as herein described.
7. A ceramic product manufactured in accordance with the method of any preceding claim.
8. A product according to claim 7 which constitutes at least part of a fireplace surround.
9. A ceramic material substantially as herein described.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9524916.5A GB9524916D0 (en) | 1995-12-06 | 1995-12-06 | Ceramic materials |
| CA002207477A CA2207477A1 (en) | 1995-12-06 | 1997-06-10 | Ceramic fibre materials and method of treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9625426D0 GB9625426D0 (en) | 1997-01-22 |
| GB2307909A true GB2307909A (en) | 1997-06-11 |
Family
ID=25679414
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9524916.5A Pending GB9524916D0 (en) | 1995-12-06 | 1995-12-06 | Ceramic materials |
| GB9625426A Ceased GB2307909A (en) | 1995-12-06 | 1996-12-06 | Glazed ceramic fibre materials |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9524916.5A Pending GB9524916D0 (en) | 1995-12-06 | 1995-12-06 | Ceramic materials |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2207477A1 (en) |
| GB (2) | GB9524916D0 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB969782A (en) * | 1960-08-05 | 1964-09-16 | Owens Corning Fiberglass Corp | High temperature resistant vitreous material and method for producing same |
| US4083905A (en) * | 1975-04-25 | 1978-04-11 | Champion Spark Plug Company | Open mesh, random fiber, ceramic structure, monolithic catalyst support |
| JPS5537440A (en) * | 1978-09-08 | 1980-03-15 | Toppan Printing Co Ltd | Manufacture of glazed ceramic board |
| GB2165533A (en) * | 1984-10-11 | 1986-04-16 | Nigel Andrew Corry | Imitation coal |
| JPS61106476A (en) * | 1984-10-26 | 1986-05-24 | 松下電器産業株式会社 | Heat insulator |
| US5194296A (en) * | 1989-11-03 | 1993-03-16 | Degussa Ag | Method of producing a coilable ceramic veneer in unfired condition |
| WO1993013033A1 (en) * | 1991-12-30 | 1993-07-08 | Societe Europeenne De Propulsion | Process for protecting products made of composite material containing carbon against oxydation, and products obtained by said pro cess |
| DE4225672C1 (en) * | 1992-08-04 | 1993-09-02 | Bayerische Motoren Werke Ag, 80809 Muenchen, De | Ceramic coating on fibrous prefroms to be infiltrated with metal - has glaze coating to give ceramic air-tight and allow infiltration to occur by internal vacuum production |
| US5569427A (en) * | 1994-03-16 | 1996-10-29 | Aerospatiale Societe Nationale Industrielle | High temperature coating on ceramic substrate and non-firing process for obtaining same |
-
1995
- 1995-12-06 GB GBGB9524916.5A patent/GB9524916D0/en active Pending
-
1996
- 1996-12-06 GB GB9625426A patent/GB2307909A/en not_active Ceased
-
1997
- 1997-06-10 CA CA002207477A patent/CA2207477A1/en not_active Abandoned
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB969782A (en) * | 1960-08-05 | 1964-09-16 | Owens Corning Fiberglass Corp | High temperature resistant vitreous material and method for producing same |
| US4083905A (en) * | 1975-04-25 | 1978-04-11 | Champion Spark Plug Company | Open mesh, random fiber, ceramic structure, monolithic catalyst support |
| JPS5537440A (en) * | 1978-09-08 | 1980-03-15 | Toppan Printing Co Ltd | Manufacture of glazed ceramic board |
| GB2165533A (en) * | 1984-10-11 | 1986-04-16 | Nigel Andrew Corry | Imitation coal |
| JPS61106476A (en) * | 1984-10-26 | 1986-05-24 | 松下電器産業株式会社 | Heat insulator |
| US5194296A (en) * | 1989-11-03 | 1993-03-16 | Degussa Ag | Method of producing a coilable ceramic veneer in unfired condition |
| WO1993013033A1 (en) * | 1991-12-30 | 1993-07-08 | Societe Europeenne De Propulsion | Process for protecting products made of composite material containing carbon against oxydation, and products obtained by said pro cess |
| DE4225672C1 (en) * | 1992-08-04 | 1993-09-02 | Bayerische Motoren Werke Ag, 80809 Muenchen, De | Ceramic coating on fibrous prefroms to be infiltrated with metal - has glaze coating to give ceramic air-tight and allow infiltration to occur by internal vacuum production |
| US5569427A (en) * | 1994-03-16 | 1996-10-29 | Aerospatiale Societe Nationale Industrielle | High temperature coating on ceramic substrate and non-firing process for obtaining same |
Non-Patent Citations (3)
| Title |
|---|
| Derwent abstract 85-048066/08 & JP 55 037 440 A * |
| Derwent abstract 86-173283/27 & JP 61 106 476 A * |
| Derwent abstract 93-274005/35 & DE 4 225 672 A * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2207477A1 (en) | 1998-12-10 |
| GB9625426D0 (en) | 1997-01-22 |
| GB9524916D0 (en) | 1996-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) | ||
| 710B | Request of alter time limits | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| AT | Applications terminated before publication under section 16(1) |