GB1037502A - Porous sintered aluminous substances - Google Patents

Porous sintered aluminous substances

Info

Publication number
GB1037502A
GB1037502A GB359763A GB359763A GB1037502A GB 1037502 A GB1037502 A GB 1037502A GB 359763 A GB359763 A GB 359763A GB 359763 A GB359763 A GB 359763A GB 1037502 A GB1037502 A GB 1037502A
Authority
GB
United Kingdom
Prior art keywords
alumina
temperature
sintered
microns
silica
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
GB359763A
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.)
Produits Chimiques Pechiney Saint Gobain
Original Assignee
Produits Chimiques Pechiney Saint Gobain
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 Produits Chimiques Pechiney Saint Gobain filed Critical Produits Chimiques Pechiney Saint Gobain
Publication of GB1037502A publication Critical patent/GB1037502A/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
    • C04B38/0045—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes

Landscapes

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

Abstract

A porous sintered aluminous substance contains alumina or alumina with at least one other refractory oxide, for example thoria, beryllia, silica or zirconia in proportion not more than 50% by weight based on the alumina, and has total pore volume greater than 20 cm.3 per 100 grm., the pores having diameters of from 0.1 micron to 5 microns. A gel of hydrated alumina or a mixed gel is mechanically dried by suction, filter - pressing, centrifuging or wringing; washed; subjected to either a crushing, molaxation, kneading or rolling treatment or a thermal treatment at a temperature not exceeding 110 DEG C.; and sintered at a temperature of 1500 DEG C. to 1800 DEG C. The gel starting material is obtained by precipitation at a pH between 7.5 and 11 from an aqueous solution of an alkali metal aluminate or an aluminium salt.ALSO:A sintered aluminous substance contains alumina with at least one other refractory oxide, for example silica, thoria, zirconia, beryllia, and has total pore volume greater than 20 cm3 per 100 gm of the substance, and pores with diameters in the range from 0.1 microns to 5 microns inclusive. The substance may contain not more than 50% by weight based on the weight of the alumina of the other refractory, oxide(s). A mixed hydrogel is mechanically dried, washed, then subjected either to another mechanical treatment or to drying at a temperature not exceeding 110 DEG C., and sintered at a temperature in the range 1500 DEG C. to 1800 DEG C. Examples 7 and 8 relate to silica-alumina
GB359763A 1962-01-30 1963-01-29 Porous sintered aluminous substances Expired GB1037502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR886358A FR1326386A (en) 1962-01-30 1962-01-30 New porous alumina-based products

Publications (1)

Publication Number Publication Date
GB1037502A true GB1037502A (en) 1966-07-27

Family

ID=8771530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB359763A Expired GB1037502A (en) 1962-01-30 1963-01-29 Porous sintered aluminous substances

Country Status (5)

Country Link
DE (1) DE1471375B2 (en)
FR (1) FR1326386A (en)
GB (1) GB1037502A (en)
LU (1) LU43090A1 (en)
NL (1) NL141161B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153813A (en) * 1984-02-01 1985-08-29 Matroc Limited Morgan Radiation-reflective ceramic material
EP0461950A1 (en) * 1990-06-13 1991-12-18 Rhone-Poulenc Chimie Porous matrix material containing a second element in dispersed form and process for its manufacture
US5354548A (en) * 1985-05-01 1994-10-11 Unilever Patent Holdings B.V. Porous three-dimensional inorganic oxide structure with myriad cavities interconnected by holes
US5397758A (en) * 1990-06-13 1995-03-14 Rhone-Poulenc Chimie Alumina-based compositions and catalysts having high specific surface area
WO2000002830A1 (en) * 1998-07-09 2000-01-20 Nerlich, Michael Porous ceramic

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2557566B1 (en) * 1983-12-29 1986-04-11 Commissariat Energie Atomique PROCESS FOR THE PREPARATION OF A SINTERABLE POWDER, ESPECIALLY A CERAMIC POWDER
GB2199541A (en) * 1986-10-16 1988-07-13 Rig Design Services Production of engineering drawings
JPH0288452A (en) * 1988-09-26 1990-03-28 Nichias Corp Heat-resistant inorganic compact
CN108947570A (en) * 2018-09-07 2018-12-07 长沙理工大学 A kind of porous ceramics microballoon and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153813A (en) * 1984-02-01 1985-08-29 Matroc Limited Morgan Radiation-reflective ceramic material
US5354548A (en) * 1985-05-01 1994-10-11 Unilever Patent Holdings B.V. Porous three-dimensional inorganic oxide structure with myriad cavities interconnected by holes
EP0461950A1 (en) * 1990-06-13 1991-12-18 Rhone-Poulenc Chimie Porous matrix material containing a second element in dispersed form and process for its manufacture
FR2663319A1 (en) * 1990-06-13 1991-12-20 Rhone Poulenc Chimie POROUS MATRIX MATERIAL CONTAINING SECOND ELEMENT IN DISPERSE FORM AND METHOD OF MANUFACTURING THE SAME.
US5397758A (en) * 1990-06-13 1995-03-14 Rhone-Poulenc Chimie Alumina-based compositions and catalysts having high specific surface area
WO2000002830A1 (en) * 1998-07-09 2000-01-20 Nerlich, Michael Porous ceramic
US6737376B1 (en) 1998-07-09 2004-05-18 Thomas Wenger Porous ceramic

Also Published As

Publication number Publication date
DE1471375A1 (en) 1968-11-28
LU43090A1 (en) 1963-07-28
FR1326386A (en) 1963-05-10
DE1471375B2 (en) 1972-02-17
NL141161B (en) 1974-02-15

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