EP0177590A1 - A porous ceramic material - Google Patents

A porous ceramic material

Info

Publication number
EP0177590A1
EP0177590A1 EP19850902006 EP85902006A EP0177590A1 EP 0177590 A1 EP0177590 A1 EP 0177590A1 EP 19850902006 EP19850902006 EP 19850902006 EP 85902006 A EP85902006 A EP 85902006A EP 0177590 A1 EP0177590 A1 EP 0177590A1
Authority
EP
European Patent Office
Prior art keywords
clay
mineral fibres
material according
fibres
porous 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.)
Pending
Application number
EP19850902006
Other languages
German (de)
French (fr)
Inventor
Dusan Makarovic
Edvard Todz MALI
Jurij Todz SOBA
Stane Todz DROLJC
Andrej Todz ELERSEK
Marjan Todz FERJAN
Matjaz Termika ZAUCER
Edo Termika KLADNIK
Zmago Stadler
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.)
TERMIKA ISOLIERBAU GmbH
Termika industrija in montaza izolacij n sol o
ZAVOD ZA RAZISKAVO MATERIALA IN KONSTRUKCIJ LJUBLJANA N SOL O
Original Assignee
TERMIKA ISOLIERBAU GmbH
Termika industrija in montaza izolacij n sol o
ZAVOD ZA RAZISKAVO MATERIALA IN KONSTRUKCIJ LJUBLJANA N SOL O
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 TERMIKA ISOLIERBAU GmbH, Termika industrija in montaza izolacij n sol o, ZAVOD ZA RAZISKAVO MATERIALA IN KONSTRUKCIJ LJUBLJANA N SOL O filed Critical TERMIKA ISOLIERBAU GmbH
Publication of EP0177590A1 publication Critical patent/EP0177590A1/en
Pending legal-status Critical Current

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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • 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
    • C04B2111/52—Sound-insulating 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values

Definitions

  • the present invention relates to a porous ceramic material, to a process for the preparation thereof as well as to its use. More particularly, the present invention relates to a ceramic material on the basis of mineral fibres and clay as ceramic binder, said material having a low density, from 350 to 800 kg/m 3 , a low thermal conductivity at room temperature, from 0.10 to 0.16 W/mK, and non-inflammabi li ty according to British Standard BS 476 part 4. Its resistance to elevated temperatures depends on the starting materials used and amounts, e.g. when using diabase rock wool and ball clay, to max. 1050 oC and when using ceramic fibres and refractory clay e.g. to 1600 oC. Said material exhibits convenient strengths with regard to low bulk density - bending strength from 0.1 to 3.0 MPa, compressive strength from 2.0 to 10 MPa - and has open porosity from 75 to 90 %.
  • the novel material according to the invention can be used for non-supoorting heat-insulating walls and as heat-insulating filler for supporting walls; for heat insulating and non-inflammable linings of walls, floors and ceilings; for interior acoustic decorative linings; for insulation of thermic devices up to a certain high temperature with regard to the starting materials employed; for fire-proof linings of steel constructions and other building constructions; for fire-proof linings in furniture parts as well as in shipbuilding.
  • the porosity of ceramic clay articles can be affected by adding different inorganic as well as organic substances (cf. H. Schmidt, Ziegelindustrie Int., 9, 500 (1978) and British patent 1 478 904).
  • inorganic insulating materials expanded perlite, expanded vermiculite, diatomaceous earths, asbestos fibres are cited as additives, whereas the addition of mireral fibres is not mentioned.
  • the objective of the present invention is a porous ceramic material, which consists of mineral fibres and clay, the weight ratio of mineral fibres/clay being from 9:1 to 3:7. Said ratio relates to the composition of raw materials as to dry weight of components as well as in the final product.
  • mineral fibres all known mineral fibres can be used, such as rock wool (basalt type and diabase type), slag wool, glass wool, ceramic fibres and also waste fibres obtained in the production of articles made of mineral fibres.
  • clays can be used (ball clays, ceramic and refractory clays, bentonite, kaolin).
  • Typical chemical composition of ball clay is as follows :
  • the weight ratio of mineral fibres/clay from 7:3 to
  • the length of mineral fibres in the final article is less than 6 mm.
  • the technological process for manufacturing ceramic material consists of mixing raw materials, forming crude products, drying and firing, and it is also an object of the present invention.
  • the process is characterized in that a pumpable aqueous suspension of clay is prepared, mineral fibres and optionally water are added up to the ratio of mineral fibres/clay from 9:1 to 3:7, the suspension is kept homogeneous by stirring, then the raw mixture is formed by means of sucking off the excess of water by vacuum in moulds with reticular bottom until no significant amounts of water can be removed any more, the formed pieces are dried, conveniently at about 100 °C, and fired at temperatures between 800 and 1000 °C.
  • the production can take place in existing tile industry.
  • the process can be carried out continuously and automated to the desired degree.
  • Said process provides that the fibres are homogeneously dispersed in materials and equally oriented in all directions. Thus better mechanical properties of products are achieved. Owing to their porosity crude products are very quickly dried in comparison with tile articles.
  • the aqueous suspension of clay should have such a density that it is appropriate for decanting or pumping.
  • Suitable compositions are in weight ratio of clay to water 1:1 to 1:2.
  • the suspension can be made from wet worked up clay or dry ground clay.
  • wet clays tilery working-up process is sufficient, all admixtures in clay being crushed under 2 mm.
  • dry clays the exploited crude clay should be dried and then ground to a fineness of less than 0.5 mm.
  • the aqueous suspension in water is prepared in both cases in a vessel with a propeller mixer.
  • the obtained suspension is then decanted into a larger collecting vessel, equipped with a stirrer for maintaining the homogeneity of suspension.
  • composition of a final product taking into account losses at work, of 40 % of clay and 60 % of mineral fibres, by weight.
  • the quantities fed into the stirring vessel can be varied as to the desired final composition of the formed article.
  • the slurry is pumped from a collecting reservoir, equipped with a stirrer, into a mould where it spreads like a liquid.
  • the mould consists of a frame 1 and a metal net 2 and is placed on a plate 3 of a moulding device.
  • a plate 3 of a moulding device In the plate there is an opening 4, which leads into a chamber 6, which chamber is connected to a rotatory vacuum pump with water sealing as it is used e.g. in the technology of asbestos-cement products.
  • a net 5 made of plastic fabric with apertures between 0.25 and 0.5 mm.
  • a rubber seal 7 between the plate 3 and the frame 1 of the mould, which secures minimum losses of underpressure at sucking off the excessive water from the slurry.
  • the underpressure is switched on by a valve 8 on the tube coming from the vacuum pump.
  • the weight of materials after sucking off water reduces for 45 %, i.e. from 100 l of slurry there is obtained a semi- manufactured product of 55 l.
  • the volume of the raw mixture of fibres/clay/water should be foreseen with regard to the volume of the formed article. Sucking off is continued until no water can be seen on the surface and for a further period until no significant amounts of water percolate any more. E.g. a layer of a thickness of 7 cm has proved to be sucked off to said degree within about a minute.
  • the frame is separated from the formed product and the raw article is transferred mechanically or by means of a vacuum handle to drying nets.
  • drying rooms as used in tilery are suitable for drying, e.g. drying chambers or drying tunnels with internal hot-air recirculation.
  • Dry semi-manufactured products achieve sufficient strength for further manipulation at being put into the kiln.
  • the conventional kilns for tilery such as circular kilns, chamber kilns or tunnel kilns.
  • the firing temperature and the firing period are the same as used in firing tile products, i.e. between 800 and 1000 °C, and the complete cycle period lasts from 50 hours on, depending upon the kiln.
  • a picture taken by a scanning electronic microscope shows a broken surface area of the material, wherein there can be seen a well preserved fibrous texture and the ceramic binding phase over it.
  • each fibre is soaked with the clay suspension, whereby in the firing phase there is achieved a good ceramic bond between individual fibres or flocks of fibres. This results in a compact porous ceramic material with satisfactory mechanical properties and good thermal characteristics.
  • Example 1 The invention is illustrated by the following Examples .
  • Example 1 The invention is illustrated by the following Examples .
  • Example 1 Example 1

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

Matériau céramique poreux comportant des fibres minérales et de l'argile à un rapport de poids allant de 9:1 à 3:7, doté d'une porosité ouverte de 75 à 90%, son coefficient de conductivité thermique à température ambiante étant inférieur à 0,2 W/mK, sa densité apparente se situant entre 350 et 800 kg/m3, la longueur des fibres minérales étant inférieure à 6 mm, sa résistance à la compression se situant entre 2,0 et 10 MPa, et sa résistance à la flexion entre 0,1 et 3 MPa. Ce matériau peut être utilisé pour une isolation thermique, pour des revêtements décoratifs acoustiques et des revêtements ignifuges. Sa fabrication comporte le mélange de matières premières, la formation de produits bruts, leur séchage et leur cuisson.Porous ceramic material comprising mineral fibers and clay with a weight ratio ranging from 9: 1 to 3: 7, with an open porosity of 75 to 90%, its coefficient of thermal conductivity at room temperature being less than 0.2 W / mK, its bulk density being between 350 and 800 kg / m3, the length of the mineral fibers being less than 6 mm, its compressive strength being between 2.0 and 10 MPa, and its resistance to bending between 0.1 and 3 MPa. This material can be used for thermal insulation, for acoustic decorative coatings and fireproof coatings. Its manufacture involves the mixing of raw materials, the formation of raw products, their drying and their cooking.

Description

A POROUS CERAMIC MATERIAL
The present invention relates to a porous ceramic material, to a process for the preparation thereof as well as to its use. More particularly, the present invention relates to a ceramic material on the basis of mineral fibres and clay as ceramic binder, said material having a low density, from 350 to 800 kg/m3, a low thermal conductivity at room temperature, from 0.10 to 0.16 W/mK, and non-inflammabi li ty according to British Standard BS 476 part 4. Its resistance to elevated temperatures depends on the starting materials used and amounts, e.g. when using diabase rock wool and ball clay, to max. 1050 ºC and when using ceramic fibres and refractory clay e.g. to 1600 ºC. Said material exhibits convenient strengths with regard to low bulk density - bending strength from 0.1 to 3.0 MPa, compressive strength from 2.0 to 10 MPa - and has open porosity from 75 to 90 %.
Final products can be formed by hand-operated tools. The novel material according to the invention can be used for non-supoorting heat-insulating walls and as heat-insulating filler for supporting walls; for heat insulating and non-inflammable linings of walls, floors and ceilings; for interior acoustic decorative linings; for insulation of thermic devices up to a certain high temperature with regard to the starting materials employed; for fire-proof linings of steel constructions and other building constructions; for fire-proof linings in furniture parts as well as in shipbuilding.
Until now mineral fibres in combination with clay have only been employed in order to improve the drying rate of clay articles. Mineral fibres are added to clay in an amount up to 15 wt. % (reported at Conference of Silicate Industry and Silicate Science, Budapest 1981, East-German Patent 126 441). The objective of the present invention, however, is not the improvement of the drying rate of clay articles, but the manufacturing of a novel thermoinsulating material with determined physical properties.
The porosity of ceramic clay articles can be affected by adding different inorganic as well as organic substances (cf. H. Schmidt, Ziegelindustrie Int., 9, 500 (1978) and British patent 1 478 904). Among inorganic insulating materials expanded perlite, expanded vermiculite, diatomaceous earths, asbestos fibres are cited as additives, whereas the addition of mireral fibres is not mentioned.
Thus the objective of the present invention is a porous ceramic material, which consists of mineral fibres and clay, the weight ratio of mineral fibres/clay being from 9:1 to 3:7. Said ratio relates to the composition of raw materials as to dry weight of components as well as in the final product.
As mineral fibres all known mineral fibres can be used, such as rock wool (basalt type and diabase type), slag wool, glass wool, ceramic fibres and also waste fibres obtained in the production of articles made of mineral fibres.
Basic characteristics of some fibres, useful in the present invention, are evident from Table 1.
Different kinds of clays can be used (ball clays, ceramic and refractory clays, bentonite, kaolin).
Typical chemical composition of ball clay is as follows :
SiO2 - 50 - 85 % Al2O3 - 10 - 25 % Fe2O3 - 2 - 10 %
CaO - 0.5 - 20 %
MgO - 0.5 - 5 %
SO3 - 0. 01 - 0.02 %
K2O+Na2O - 2 - 5 %
The weight ratio of mineral fibres/clay from 7:3 to
6:4 is specially preferred. The length of mineral fibres in the final article is less than 6 mm.
The technological process for manufacturing ceramic material consists of mixing raw materials, forming crude products, drying and firing, and it is also an object of the present invention. The process is characterized in that a pumpable aqueous suspension of clay is prepared, mineral fibres and optionally water are added up to the ratio of mineral fibres/clay from 9:1 to 3:7, the suspension is kept homogeneous by stirring, then the raw mixture is formed by means of sucking off the excess of water by vacuum in moulds with reticular bottom until no significant amounts of water can be removed any more, the formed pieces are dried, conveniently at about 100 °C, and fired at temperatures between 800 and 1000 °C.
The production can take place in existing tile industry. The process can be carried out continuously and automated to the desired degree.
Said process provides that the fibres are homogeneously dispersed in materials and equally oriented in all directions. Thus better mechanical properties of products are achieved. Owing to their porosity crude products are very quickly dried in comparison with tile articles.
The aqueous suspension of clay should have such a density that it is appropriate for decanting or pumping. Suitable compositions are in weight ratio of clay to water 1:1 to 1:2.
The suspension can be made from wet worked up clay or dry ground clay. When using wet clays, tilery working-up process is sufficient, all admixtures in clay being crushed under 2 mm. When using dry clays, the exploited crude clay should be dried and then ground to a fineness of less than 0.5 mm.
The aqueous suspension in water is prepared in both cases in a vessel with a propeller mixer. The obtained suspension is then decanted into a larger collecting vessel, equipped with a stirrer for maintaining the homogeneity of suspension.
Into the stirring vessel there are fed the suspension, mineral fibres and additional water. For stirring there are used fast hollow stirrers, e.g. with 2800 rpm. Stirring is continued until there is obtained a pumpable suspension, capable of being cast.
As an example there is given the stirring of rock wool on the basis of diabase with fibres of a length up to 3 cm. The materials are fed into a stirring vessel in following quantities: suspension clay:water
(weight ratio 1:1) 180 kg rock wool 120 kg water 400 kg
The above composition will result in the composition of a final product, taking into account losses at work, of 40 % of clay and 60 % of mineral fibres, by weight.
The quantities fed into the stirring vessel can be varied as to the desired final composition of the formed article.
Semi-manufactured articles are then moulded as schematically represented by Fig. 1
The slurry is pumped from a collecting reservoir, equipped with a stirrer, into a mould where it spreads like a liquid. The mould consists of a frame 1 and a metal net 2 and is placed on a plate 3 of a moulding device. In the plate there is an opening 4, which leads into a chamber 6, which chamber is connected to a rotatory vacuum pump with water sealing as it is used e.g. in the technology of asbestos-cement products. Over the metal net there is stretched a net 5, made of plastic fabric with apertures between 0.25 and 0.5 mm. Of great importance is a rubber seal 7 between the plate 3 and the frame 1 of the mould, which secures minimum losses of underpressure at sucking off the excessive water from the slurry. The underpressure is switched on by a valve 8 on the tube coming from the vacuum pump.
For the above composition, the weight of materials after sucking off water reduces for 45 %, i.e. from 100 l of slurry there is obtained a semi- manufactured product of 55 l. Hence at moulding, the volume of the raw mixture of fibres/clay/water should be foreseen with regard to the volume of the formed article. Sucking off is continued until no water can be seen on the surface and for a further period until no significant amounts of water percolate any more. E.g. a layer of a thickness of 7 cm has proved to be sucked off to said degree within about a minute. After the sucking off is complete, the frame is separated from the formed product and the raw article is transferred mechanically or by means of a vacuum handle to drying nets.
Results of experimetal work according to the present process have shown that a continuous process can be designed, wherein the raw mixture is poured on to an endless net passing through an evacuating zone, then the strip is cut into appropriate sizes and transferred to drying nets. Subsequently, semi-manufactured articles are dried.
They dry at. a substantially quicker rate than raw products made only of clay. Plates of a thickness of
6 cm with dry bulft density of about 700 kg/m3 dry for 8 hours at 100 ºC. In comparison with standard clay products, the drying is completely uncomplicated with no risk of the cracking of the products.
Conventiona. drying rooms as used in tilery are suitable for drying, e.g. drying chambers or drying tunnels with internal hot-air recirculation.
Dry semi-manufactured products achieve sufficient strength for further manipulation at being put into the kiln.
For firing the products there may be used the conventional kilns for tilery, such as circular kilns, chamber kilns or tunnel kilns. The firing temperature and the firing period are the same as used in firing tile products, i.e. between 800 and 1000 °C, and the complete cycle period lasts from 50 hours on, depending upon the kiln.
All phases of the technological process are schematically shown in Fig. 2.
A picture taken by a scanning electronic microscope (Fig. 3) shows a broken surface area of the material, wherein there can be seen a well preserved fibrous texture and the ceramic binding phase over it. In the stirring phase each fibre is soaked with the clay suspension, whereby in the firing phase there is achieved a good ceramic bond between individual fibres or flocks of fibres. This results in a compact porous ceramic material with satisfactory mechanical properties and good thermal characteristics.
The invention is illustrated by the following Examples . Example 1
In a stirring vessel of a high rotor rate (2800 rpm) there are stirred 1500 g of waste rock wool, 2250 g of an aqueous suspension of clay in a weight ratio of 1:1 and 5000 g of water. After about 5 minutes of stirring, the obtained slurry is poured into a mould with a reticular bottom and excessive water is sucked off. The raw product is released from the mould, dried for 8 hours at 100 °C and fired for 3 hours at 900 ºC. After cooling the product exhibits the following properties : bulk density 650 kg/m3 coefficient of thermal conductivity at room temperature λ= 0.13 W/mK bending strength 2.0 MPa compressive strength 5.0 MPa melting point 1120 °C
Example 2
1500 g of rock wool granules are given, within 10 to 20 sec. under intensive stirring (1440 rpm), into 3000 g of a 25 % aqueous suspension of clay. Uniformly impregnated granules of rock woll are filled wet into a mould, uniformly distributed by means of vibrating and pressed by means of low pressure to such an extent that the formed product maintains its shape. The formed product is dried for 2 hours at a temperature of 110 ºC and fired for 2 hours at a temperature of
900 °C. After cooling the product exhibits the following properties : bulk densi ty 650 kg/ m3 coefficient of thermal conductivity at room temperature λ = 0. 14 W / mK bending strength 0. 9 MPa compress ive strength 3 . 0 MPa Example 3
The procedu re i s the same as i n Examp le 2 wi th the only exception that there are taken 1000 g of granules of ceramic fibres and 2000 g of a 25 % aqueous suspension of clay . There is obtained a product wi th the following properties : bulk dens ity 700 kg/ m3 coefficient of thermal conductivity at room temperature λ = 0.13 W/mK bendi ng strength 1 . 0 MPa compressive strength 3.5 MPa
Example 4
The procedure is the same as in Example 2 with the only exception that there are taken 350 g of granulated glass wool and 1400 g of a 25 % aqueous suspension of clay. Firing takes place at 800 ºC. There is obtained a product with the following properties: bulk density 470 kg/m3 coefficient of thermal conductivity at room temperature λ= 0.13 W/mK bending strength 0.7 MPa compressive strength 2.8 MPa
According to the present process there can be manufactured articles of larger dimensions, e.g. 500 x 1000 mm, and of thicknesses up to 90 mm.

Claims

1. A porous ceramic material comprising mineral fibres and clay, the weight ratio of mineral fibres to clay being from 9:1 to 3:7.
2. A material according to claim 1, characterized in that all known mineral fibres, rock wool of basalt or diabase type, slag wool, glass wool, ceramic fibres or wastes at the production of articles from mineral fibres are employed as mineral fibres.
3. A material according to claim 1, characterized in that ball clay, ceramic and refractory clays, bentonite and kaolin are used as clays.
4. A material according to claim 1, characterized in that the weight ratio of mineral fibres to clay is from 7:3 to 6:4.
5. A material according to claim 1, characterized in that it has open porosity from 75 to 90 %.
6. A material according to claim 1, characterized in that the coefficient of thermal conductivity thereof is less than 0.2 W/mK, preferably between 0.13 and 0.16 W/mK, at room temperature.
7. A material according to claim 1, characterized in that bulk density thereof is between 350 and 800 kg/m3.
8. A material according to claim 1, characterized in that the length of mineral fibres is under 6 mm.
9. Process for manufacturing a porous ceramic material as defined in claim 1 , characterized in that a pumpable aqueous suspension of clay is prepared, mineral fibres and optionally water are added to the ratio of mineral fibres/clay from 9:1 to 3:7, the suspension is kept homogeneous by stirring, then the raw mixture is formed by means of sucking off the excess of water by vacuum in moulds with reticular bottom until no significant amounts of water are removed, the formed pieces are dried, conveniently at about 100 °C, and fired at temperatures between 800 and 1000 °C .
10. A process according to claim 9, characterized in that it is carried out continuously.
11. Use of the porous ceramic material according to claim 1 for thermal and high- temperature insulation, for acoustic decorative lining and for fire-proof linings.
EP19850902006 1984-03-26 1985-03-25 A porous ceramic material Pending EP0177590A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
YU52484A YU43667B (en) 1984-03-26 1984-03-26 Process for making porous ceramic material
YU524/84 1984-03-26

Publications (1)

Publication Number Publication Date
EP0177590A1 true EP0177590A1 (en) 1986-04-16

Family

ID=25550313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850902006 Pending EP0177590A1 (en) 1984-03-26 1985-03-25 A porous ceramic material

Country Status (5)

Country Link
EP (1) EP0177590A1 (en)
HU (1) HUT45951A (en)
SI (1) SI8410524A8 (en)
WO (1) WO1985004391A1 (en)
YU (1) YU43667B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106278180B (en) * 2016-08-12 2020-02-14 大连宝昇国际贸易有限公司 Novel continuous porous foamed ceramic and preparation method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1093206A (en) * 1966-04-01 1967-11-29 Armstrong Cork Co Improvements in or relating to ceramic sound absorbing products
FR2396832A1 (en) * 1977-07-08 1979-02-02 Redco Sa COMPOSITION OF MATERIAL BASED ON MINERAL FIBERS
US4257812A (en) * 1979-01-17 1981-03-24 The Babcock & Wilcox Company Fibrous refractory products
JPS58223419A (en) * 1982-06-21 1983-12-26 Matsushita Electric Ind Co Ltd Filter made of ceramic fiber
JP3445858B2 (en) * 1994-12-29 2003-09-08 臼井国際産業株式会社 Automotive metal piping with a protective coating layer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8504391A1 *

Also Published As

Publication number Publication date
WO1985004391A1 (en) 1985-10-10
SI8410524A8 (en) 1996-06-30
YU43667B (en) 1989-10-31
YU52484A (en) 1986-10-31
HUT45951A (en) 1988-09-28

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Inventor name: STADLER, ZMAGO

Inventor name: ZAUCER, MATJAZTERMIKA

Inventor name: KLADNIK, EDOTERMIKA