IE31849L - Ceramics. - Google Patents

Ceramics.

Info

Publication number
IE31849L
IE31849L IE680247A IE24768A IE31849L IE 31849 L IE31849 L IE 31849L IE 680247 A IE680247 A IE 680247A IE 24768 A IE24768 A IE 24768A IE 31849 L IE31849 L IE 31849L
Authority
IE
Ireland
Prior art keywords
alumina
layer
solvent
mixture
fired
Prior art date
Application number
IE680247A
Other versions
IE31849B1 (en
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of IE31849L publication Critical patent/IE31849L/en
Publication of IE31849B1 publication Critical patent/IE31849B1/en

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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/6342—Polyvinylacetals, e.g. polyvinylbutyral [PVB]
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N97/00—Electric solid-state thin-film or thick-film devices, not otherwise provided for
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W99/00—Subject matter not provided for in other groups of this subclass

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

1,217,042. Alumina. WESTERN ELECTRIC CO. Inc. 29 Feb., 1968 [27 April, 1967], No. 9857/68. Heading C1A. Alumina in the form of a thin layer is produced by first forming an alumina slip by intimately mixing together a size graded alumina, i.e. an alumina having a broad particle size range, this alumina having a minimum surface area of 12 m<SP>2</SP>/gm, a solvent, i.e. a liquid preferably organic which is volatile at temperatures only slightly elevated above the ambient, a binder, i.e. a material which retains the alumina in its cast shape after the solvent has evaporated and which is soluble in the solvent, casting the mixture on to a surface to form a layer and removing the solvent to give an unfired layer. The layer may be fired to give a ceramic product. Preferably the alumina used has a maximum surface area of 16 m<SP>2</SP>/gm. and the layer is fired for a period of time ranging from 15 mins. to 3 hours at a temperature ranging from 1425- 1550‹ C. The sovlent may be eliminated from the prefired layer by drying for several hours at room temperature. A plasticizer which is compatible with the binder may be added to the mixture and an exemplified combination is a polyvinyl butyral resin and a plasticizer consisting of a mixture of glycol and a phthalate. The solvent may be an azeotropicmixture of two organic liquids one of which is soluble in water; e.g. a mixture of ethyl alcohol and trichlorethylene. The mixture may also include a grain growth inhibitor, e.g. talc, and the alumina required for the composition may be obtained by taking an alumina having a surface area of less than 12 m<SP>2</SP>/gm. and milling it in the presence of at least a portion of the solvent and a deflocculating agent, e.g. menhaden oil. The surface on which the composition is cast may be cellulose acetate, glycol-terphthalic acid polyester, a fluo-halocarbon film, or chromium plated stainless steel. The dried prefired layer may be cut into the desired shape or shapes before firing and during such firing the shapes may be weighted down by previously fired shapes to prevent warping. The fired product preferably has a maximum grain size of about 1 micron, zero water content, and a Centre Line Average finish on at least one surface of less than 3À5 micro inches. [GB1217042A]
IE247/68A 1967-04-27 1968-03-04 Improvements in or relating to ceramics IE31849B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63437067A 1967-04-27 1967-04-27

Publications (2)

Publication Number Publication Date
IE31849L true IE31849L (en) 1968-10-27
IE31849B1 IE31849B1 (en) 1973-01-10

Family

ID=24543499

Family Applications (1)

Application Number Title Priority Date Filing Date
IE247/68A IE31849B1 (en) 1967-04-27 1968-03-04 Improvements in or relating to ceramics

Country Status (10)

Country Link
BE (1) BE714234A (en)
CH (1) CH515784A (en)
DE (1) DE1771216B1 (en)
ES (1) ES353630A1 (en)
FR (1) FR1564260A (en)
GB (1) GB1217042A (en)
IE (1) IE31849B1 (en)
IL (1) IL29566A (en)
NL (1) NL6805969A (en)
SE (1) SE339650B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1425934A (en) * 1972-03-15 1976-02-25 Ici Ltd Alumina
JPS6034510B2 (en) * 1976-06-10 1985-08-09 日本碍子株式会社 Extrusion manufacturing method of ceramic honeycomb structure
DE2727364A1 (en) * 1977-06-16 1979-01-04 Siemens Ag METHOD FOR MANUFACTURING CERAMIC SUBSTRATES
FR2568722B1 (en) * 1984-08-03 1987-10-23 Thomson Csf DIELECTRIC CERAMIC SUBSTRATE AND PROCESS FOR OBTAINING
FR2614421B1 (en) * 1987-04-24 1989-09-15 Thomson Csf METHOD FOR MANUFACTURING A SUBSTRATE WITH HIGH RESISTIVITY AND APPLICATION TO A GAS ANALYSIS PROBE
GB2211179B (en) * 1987-10-15 1992-08-12 Hoechst Ceram Tec Ag Aluminium oxide shaped articles and process for their manufacture

Also Published As

Publication number Publication date
ES353630A1 (en) 1969-10-16
IE31849B1 (en) 1973-01-10
IL29566A (en) 1971-11-29
DE1771216B1 (en) 1972-04-27
BE714234A (en) 1968-09-16
GB1217042A (en) 1970-12-23
NL6805969A (en) 1968-10-28
FR1564260A (en) 1969-04-18
SE339650B (en) 1971-10-11
CH515784A (en) 1971-11-30

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