GB2260538A - Porous ceramics - Google Patents

Porous ceramics Download PDF

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Publication number
GB2260538A
GB2260538A GB9216013A GB9216013A GB2260538A GB 2260538 A GB2260538 A GB 2260538A GB 9216013 A GB9216013 A GB 9216013A GB 9216013 A GB9216013 A GB 9216013A GB 2260538 A GB2260538 A GB 2260538A
Authority
GB
United Kingdom
Prior art keywords
slip
piece
cellular material
interstices
article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9216013A
Other versions
GB2260538B (en
GB9216013D0 (en
Inventor
Peter Gant
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.)
Individual
Original Assignee
Individual
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
Priority claimed from GB919121809A external-priority patent/GB9121809D0/en
Application filed by Individual filed Critical Individual
Priority to GB9216013A priority Critical patent/GB2260538B/en
Publication of GB9216013D0 publication Critical patent/GB9216013D0/en
Publication of GB2260538A publication Critical patent/GB2260538A/en
Application granted granted Critical
Publication of GB2260538B publication Critical patent/GB2260538B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28042—Shaped bodies; Monolithic structures
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G27/00—Self-acting watering devices, e.g. for flower-pots
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • A47J37/07—Roasting devices for outdoor use; Barbecues
    • A47J37/0786—Accessories
    • A47J37/079—Charcoal igniting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28042—Shaped bodies; Monolithic structures
    • B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28095—Shape or type of pores, voids, channels, ducts
    • B01J20/28097—Shape or type of pores, voids, channels, ducts being coated, filled or plugged with specific compounds
    • 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
    • C04B38/0615—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 the burned-out substance being a monolitic element having approximately the same dimensions as the final article, e.g. a porous polyurethane sheet or a prepreg obtained by bonding together resin particles
    • 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
    • C04B2111/00758—Uses not provided for elsewhere in C04B2111/00 for agri-, sylvi- or piscicultural or cattle-breeding applications
    • 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
    • C04B2111/00965—Uses not provided for elsewhere in C04B2111/00 for household applications, e.g. use of materials as cooking ware

Abstract

A method of making a porous ceramic article comprises soaking a piece of resilient cellular material in a suitable slip, squeezing the piece of material to remove the excess slip, allowing the slip to dry and then firing the material so that the slip forms a ceramic block and the cellular material is burnt away. The article may be soaked in fuel and used as an ignition device, eg. for barbecues, or it may be used as a water storage block/filter in plant containers, or as an air moisturiser.

Description

PRODUCTION METHOD This invention relates to a method of producing a porous ceramic article and to an article produced by the method, and has for its object to provide such a method in a simple and convenient form.
According to the invention a method of producing a porous ceramic article comprises selecting a piece of resilient cellular material, immersing the piece of material in a ceramic slip so that the slip flows into the interstices of the material, squeezing the piece of material to remove excess slip, allowing the piece of material to dry out and then firing the piece of material at a temperature which is sufficient to cause formation of the porous ceramic article and the burning away of the cellular material.
The porous ceramic article produced by the aforesaid method has a number of uses for example, it is particularly useful as an ignition device for barbecues and the like, the article being soaked in fuel such as methylated spirit, prior to use. It may also be used as a water storage block/filter for use in hanging baskets, plant troughs and the like. It can also be used as an air moisturiser.
The resulting article has the shape of the original piece of cellular material and this is therefore chosen with the required shape and dimensions of the article in mind. The constituents of the ceramic slip can be varied so that the article may be produced as fine bone china, parian, porcelain, semi-porcelain, earthenware, fine brick cement or stoneware.
When used for the aforesaid purposes the porous ceramic blocks are utilised as follows:1. As an ignition block/firelighter the article is saturated with barbecue lighting fluid/methylated spirits prior to being placed amongst the charcoal, coal or logs. It is then set alight with a match and will burn for a sufficient period of time to ignite the barbecue/fire. It is re usable and eliminates the danger of flareback.
2. As a water storage block/filter the article is saturated with water and placed on a layer of potting compost/peat within the plant container about one third of the way up the container. The container is then filled to the top with more potting compost/peat and planted. The container should be watered in the normal way but the frequency of watering is reduced as a consequence of the storage qualities of the ceramic block which allows water to filter out and moisten the soil around it. The porous ceramic block is re usable.
3. As an air moisturiser/humidifier the article is placed in a suitable container and saturated with water. It will retain the water for a considerable period of time and can be re-used.
As an example a slip mixture was produced using approximately 100 kilograms of fine bone china clay, 14 litres of water and 0.3 litres of sodium silicate, the fine bone china clay being a mixture comprising calcined bone, cornish stone, china clay and ball clay in approximate quantities of 47.0%, 27.0%, 22.7% and 2.7% respectively.
A natural or a synthetic sponge can form the cellular material and in the case of the synthetic sponge it must be an open pore sponge to allow the slip material to coat the walls of the interstices thereof.
In carrying out the method the sponge is squeezed and immersed in the slip so that the slip flows into the interstices when it is released. This process is repeated a number of times whilst it is in the slip until it is thoroughly saturated. The sponge is then removed from the slip and thoroughly squeezed again to remove the excess slip. This leaves a coating of slip on the walls of the interstices.
If desired prior to immersing the sponge in the slip the surfaces of the sponge which form the interstices may be "wetted" by immersing the sponge in water.
The sponge is then allowed to dry after which it is fired in a kiln at a temperature if the slip composition indicated above is used, of 10400C to 12200C depending upon the intended purpose of the finished article. The firing process causes the material forming the sponge to be burnt away and also the slip to form a porous biscuit ceramic block of fine bone china.
An alternative slip mixture for producing an earthenware article comprises 25% china clay, 25% ball clay, 24% felspar and 26% silica sand to which is added water, sodium silicate and soda ash to produce the desired viscosity. The firing temperature varies between 950" and 12200 depending upon the intended purpose of the finished article.
CLAIMS 1. A method of producing a porous ceramic article comprising selecting a piece of resilient cellular material, immersing the piece of material in a ceramic slip so that the slip flows into the interstices of the material, squeezing the piece of material to remove excess slip, allowing the piece of material to dry out and then firing the piece of material at a temperature which is sufficient to cause formation of the porous ceramic article and the burning away of the cellular material.
2. A method according to Claim 1, in which the cellular material is squeezed and released while it is in the slip to ensure that the slip flows into the interstices of the material.
3. A method according to Claim 1 or Claim 2, in which the surfaces of the cellular material which form the interstices are wetted with water prior to immersion in the slip.
4. A method according to Claim 1, in which the slip is composed of a mixture of fine bone china clay, sodium silicate and water.
5. A method according to Claim 4, in which the fine bone china clay comprises a mixture of calcined bone, cornish stone, china clay and ball clay in approximate quantities of 47.0%, 27.0%, 22.7% and 2.7% respectively.
6. A method according to any one of the preceding claims, in which the piece of cellular material is fashioned to the desired shape of the ceramic article prior to being wetted and/or immersed in the slip.
7. A porous ceramic article when produced in accordance with the methods claimed in any one of the preceding claims.

Claims (7)

  1. Amendments to the claims
    have been filed as follows 1. A method of producing a liquid retention block comprising selecting a piece of resilient cellular material, immersing the piece of material in a ceramic slip so that the slip flows into the interstices of the material, squeezing the piece of material to remove excess slip, allowing the piece of material to dry out and then firing the piece of material at a temperature which is sufficient to cause formation of the liquid retention block and the burning away of the cellular material.
  2. 2. A method according to Claim 1, in which the cellular material is squeezed and released while it is in the slip to ensure that the slip flows into the interstices of the material.
  3. 3. A method according to Claim 1 or Claim 2, in which the surfaces of the cellular material which form the interstices are wetted with water prior to immersion in the slip.
  4. 4. A method according to Claim 1, in which the slip is composed of a mixture of fine bone china clay, sodium silicate and water.
  5. 5. A method according to Claim 4, in which the fine bone china clay comprises a mixture of calcined bone, cornish stone, china clay and ball clay in approximate quantities of 47.0%, 27.0%, 22.7% and 2.7% respectively.
  6. 6. A method according to any one of the preceding claims, in which the piece of cellular material is fashioned to the desired shape of the ceramic article prior to being wetted and/or immersed in the slip.
  7. 7. A liquid retention block when produced in accordance with the methods claimed in any one of the preceding claims.
GB9216013A 1991-10-15 1992-07-28 Ceramic block for liquid retention Expired - Fee Related GB2260538B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9216013A GB2260538B (en) 1991-10-15 1992-07-28 Ceramic block for liquid retention

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919121809A GB9121809D0 (en) 1991-10-15 1991-10-15 Production method
GB9216013A GB2260538B (en) 1991-10-15 1992-07-28 Ceramic block for liquid retention

Publications (3)

Publication Number Publication Date
GB9216013D0 GB9216013D0 (en) 1992-09-09
GB2260538A true GB2260538A (en) 1993-04-21
GB2260538B GB2260538B (en) 1995-08-16

Family

ID=26299696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9216013A Expired - Fee Related GB2260538B (en) 1991-10-15 1992-07-28 Ceramic block for liquid retention

Country Status (1)

Country Link
GB (1) GB2260538B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1007105C2 (en) * 1997-09-24 1999-03-25 Belone Porous ceramic products used as e.g. filters, horticultural products or construction elements
WO2000042991A1 (en) 1999-01-26 2000-07-27 Partisyn, Inc. Inorganic shaped bodies and methods for their production and use
US6458162B1 (en) 1999-08-13 2002-10-01 Vita Special Purpose Corporation Composite shaped bodies and methods for their production and use
US6736799B1 (en) 2000-10-24 2004-05-18 Vita Licensing, Inc. Delivery device for biological composites and method of preparation thereof
US7052517B2 (en) 2000-10-24 2006-05-30 Vita Special Purpose Corporation Delivery device for biological composites and method of preparation thereof
FR2943338A1 (en) * 2009-03-23 2010-09-24 Tech Ceramique Avancee Orriule Producing a porous ceramic element for diffusion of water for watering, comprises molding a slurry comprising silica under pressure and then curing the slurry, where the slurry comprises silica having two types of particle distribution
WO2012038610A1 (en) * 2010-09-22 2012-03-29 Technique Ceramique Avancee Orriule Method for making a porous ceramic element for diffusing a liquid, associated equipment, and porous ceramic element produced according to said method
US8287915B2 (en) 2004-02-03 2012-10-16 Orthovita, Inc. Bone restorative carrier mediums
US8460686B2 (en) 2006-06-29 2013-06-11 Orthovita, Inc. Bioactive bone graft substitute
US9220595B2 (en) 2004-06-23 2015-12-29 Orthovita, Inc. Shapeable bone graft substitute and instruments for delivery thereof
US10035174B2 (en) 2015-02-09 2018-07-31 United Technologies Corporation Open-cell reticulated foam

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB923862A (en) * 1960-03-09 1963-04-18 Ivor James Holland Porous refractory materials
GB1114385A (en) * 1965-03-29 1968-05-22 Sangotoki Kabushiki Kaisha Manufacture of porous ceramic material
GB1388912A (en) * 1972-01-14 1975-03-26 Foseco Int Porous ceramic materials
GB2074148A (en) * 1980-04-16 1981-10-28 Rolls Royce Porous refractory materials
GB2132603A (en) * 1983-01-03 1984-07-11 Champion Spark Plug Co Open celled electrically conductive ceramic network
GB2168337A (en) * 1984-12-12 1986-06-18 Toshiba Ceramics Co Ceramic foam
GB2168336A (en) * 1984-12-12 1986-06-18 Toshiba Ceramics Co A ceramic foam
GB2237014A (en) * 1989-10-16 1991-04-24 Gnii Stroitelnoj Keramiki Producing articles from filtering ceramic foam

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946039A (en) * 1967-10-30 1976-03-23 Energy Research & Generation, Inc. Reticulated foam structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB923862A (en) * 1960-03-09 1963-04-18 Ivor James Holland Porous refractory materials
GB1114385A (en) * 1965-03-29 1968-05-22 Sangotoki Kabushiki Kaisha Manufacture of porous ceramic material
GB1388912A (en) * 1972-01-14 1975-03-26 Foseco Int Porous ceramic materials
GB2074148A (en) * 1980-04-16 1981-10-28 Rolls Royce Porous refractory materials
GB2132603A (en) * 1983-01-03 1984-07-11 Champion Spark Plug Co Open celled electrically conductive ceramic network
GB2168337A (en) * 1984-12-12 1986-06-18 Toshiba Ceramics Co Ceramic foam
GB2168336A (en) * 1984-12-12 1986-06-18 Toshiba Ceramics Co A ceramic foam
GB2237014A (en) * 1989-10-16 1991-04-24 Gnii Stroitelnoj Keramiki Producing articles from filtering ceramic foam

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1007105C2 (en) * 1997-09-24 1999-03-25 Belone Porous ceramic products used as e.g. filters, horticultural products or construction elements
US6991803B2 (en) 1999-01-26 2006-01-31 Vita Special Purpose Corporation Inorganic shaped bodies and methods for their production and use
WO2000042991A1 (en) 1999-01-26 2000-07-27 Partisyn, Inc. Inorganic shaped bodies and methods for their production and use
US6383519B1 (en) 1999-01-26 2002-05-07 Vita Special Purpose Corporation Inorganic shaped bodies and methods for their production and use
US6521246B2 (en) 1999-01-26 2003-02-18 Vita Special Purpose Corporation Inorganic shaped bodies and methods for their production and use
US6458162B1 (en) 1999-08-13 2002-10-01 Vita Special Purpose Corporation Composite shaped bodies and methods for their production and use
US6863899B2 (en) 1999-08-13 2005-03-08 Vita Special Purpose Corporation Composite shaped bodies and methods for their production and use
US7052517B2 (en) 2000-10-24 2006-05-30 Vita Special Purpose Corporation Delivery device for biological composites and method of preparation thereof
US6736799B1 (en) 2000-10-24 2004-05-18 Vita Licensing, Inc. Delivery device for biological composites and method of preparation thereof
US8876911B2 (en) 2000-10-24 2014-11-04 Orthovita, Inc. Delivery device for biological composites and method of preparation thereof
US8287915B2 (en) 2004-02-03 2012-10-16 Orthovita, Inc. Bone restorative carrier mediums
US9220595B2 (en) 2004-06-23 2015-12-29 Orthovita, Inc. Shapeable bone graft substitute and instruments for delivery thereof
US9789225B2 (en) 2004-06-23 2017-10-17 Orthovita, Inc. Shapeable bone graft substitute and instruments for delivery thereof
US10441683B2 (en) 2004-06-23 2019-10-15 Orthovita, Inc. Method for restoring bone using shapeable bone graft substitute and instruments for delivery thereof
US8460686B2 (en) 2006-06-29 2013-06-11 Orthovita, Inc. Bioactive bone graft substitute
FR2943338A1 (en) * 2009-03-23 2010-09-24 Tech Ceramique Avancee Orriule Producing a porous ceramic element for diffusion of water for watering, comprises molding a slurry comprising silica under pressure and then curing the slurry, where the slurry comprises silica having two types of particle distribution
WO2012038610A1 (en) * 2010-09-22 2012-03-29 Technique Ceramique Avancee Orriule Method for making a porous ceramic element for diffusing a liquid, associated equipment, and porous ceramic element produced according to said method
US10035174B2 (en) 2015-02-09 2018-07-31 United Technologies Corporation Open-cell reticulated foam

Also Published As

Publication number Publication date
GB2260538B (en) 1995-08-16
GB9216013D0 (en) 1992-09-09

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010728