GB999983A - Method of manufacture of porous ceramic material having low heat conductivity - Google Patents

Method of manufacture of porous ceramic material having low heat conductivity

Info

Publication number
GB999983A
GB999983A GB1020362A GB1020362A GB999983A GB 999983 A GB999983 A GB 999983A GB 1020362 A GB1020362 A GB 1020362A GB 1020362 A GB1020362 A GB 1020362A GB 999983 A GB999983 A GB 999983A
Authority
GB
United Kingdom
Prior art keywords
granules
heating
average diameter
product
refractory material
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.)
Expired
Application number
GB1020362A
Inventor
Micheline Calis
Jean Peyssou
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB999983A publication Critical patent/GB999983A/en
Expired 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
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063—Preparing or treating the raw materials individually or as batches
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063—Preparing or treating the raw materials individually or as batches
    • C04B38/0635—Compounding ingredients
    • C04B38/0645—Burnable, meltable, sublimable materials
    • C04B38/065—Burnable, meltable, sublimable materials characterised by physical aspects, e.g. shape, size or porosity
    • 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
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • C04B2111/00482—Coating or impregnation materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention comprises a porous ceramic material consisting of a concretion of granules having an average diameter of 5 to 100 m with pores between the granules having an average diameter substantially the same as that of the granules, each granule being constituted by the agglomeration of micrograins having an average diameter of 0.01 to 0.02 m , and its preparation by compacting micro-grains as defined above and heating to incipient fusion to form a porous product, crushing the product to produce a granular material having a porosity of at least 50% by volume, dry-mixing substantially equal volumes of the granular material and a carbohydrate filler which is substantially thermally decomposable to gaseous products at a temperature below the sintering temperature of the refractory material, forming a shaped article from the dry mix and heating this to eliminate the filler substantially completely, and then sintering at 1350 DEG to 1600 DEG C. Ceramic materials specified are alumina, magnesia, spinel, beryllium oxide and zirconia. Carbohydrate fillers specified are starch, flour, sugar and saccharose. The product may be coated with a film of refractory material, for example alumina, by pre-heating the article to about 400 DEG C. and spraying thereon a layer of about 0.5 mm. of refractory material.
GB1020362A 1961-06-12 1962-03-16 Method of manufacture of porous ceramic material having low heat conductivity Expired GB999983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR864584A FR1301843A (en) 1961-06-12 1961-06-12 Porous ceramic with very low thermal conductivity and process for its manufacture

Publications (1)

Publication Number Publication Date
GB999983A true GB999983A (en) 1965-07-28

Family

ID=8757010

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1020362A Expired GB999983A (en) 1961-06-12 1962-03-16 Method of manufacture of porous ceramic material having low heat conductivity

Country Status (2)

Country Link
FR (1) FR1301843A (en)
GB (1) GB999983A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2838201A1 (en) * 1978-09-01 1980-03-13 Rudolf Ing Grad Wehinger Parcel wrapping machine for plastics film - has belt conveyors with welding and cutting station, controlled by optical sensors
GB2153813A (en) * 1984-02-01 1985-08-29 Matroc Limited Morgan Radiation-reflective ceramic material
US10472291B2 (en) 2013-10-15 2019-11-12 Corning Incorporated Crosslinked starches for pore forming in ceramics

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2838201A1 (en) * 1978-09-01 1980-03-13 Rudolf Ing Grad Wehinger Parcel wrapping machine for plastics film - has belt conveyors with welding and cutting station, controlled by optical sensors
GB2153813A (en) * 1984-02-01 1985-08-29 Matroc Limited Morgan Radiation-reflective ceramic material
US10472291B2 (en) 2013-10-15 2019-11-12 Corning Incorporated Crosslinked starches for pore forming in ceramics

Also Published As

Publication number Publication date
FR1301843A (en) 1962-08-24

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