GB1189853A - Alumina Ceramic Substrates - Google Patents

Alumina Ceramic Substrates

Info

Publication number
GB1189853A
GB1189853A GB2495367A GB2495367A GB1189853A GB 1189853 A GB1189853 A GB 1189853A GB 2495367 A GB2495367 A GB 2495367A GB 2495367 A GB2495367 A GB 2495367A GB 1189853 A GB1189853 A GB 1189853A
Authority
GB
United Kingdom
Prior art keywords
microns
alumina
size
fired
ceramic substrates
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
GB2495367A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB1189853A publication Critical patent/GB1189853A/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
    • 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

Landscapes

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

Abstract

1,189,853. Alumina ceramic substrates. MINNESOTA MINING & MFG. CO. 30 May, 1967 [31 May, 1966], No. 24953/67. Heading C1A. A self-supporting sheet between 75 and 1300 microns thick consists of at least 97% wt. alpha alumina crystals being no larger than 30 microns in size and having a median crystal size no greater than 6 microns, and has a specific gravity of 3À75-3À94, and a free surface having an unground as-fired surface finish of less than 10 microinches centre line average. Any other inorganic constituents such as MgO, SiO 2 and CaO in the ceramic must be non-promoters, preferably inhibitors, of crystal growth. The substrate may be prepared by mixing, e.g. in a ball mill calcined alumina having an average particle size of between 1 and 2 microns and preferably a surface area greater than 1À9 sq. metres/gm. with any suitable inorganic additives and a volatile temporary binder and diluent system consisting of a polyvinyl butyral organic resin, an oil plasticizer, e.g. castor oil, ethyl alcohol and toluol as solvent. This composition is de-aired and knife-coated on a very smooth-surfaced temporary carrier film. This film is then dried, cut into plates and fired at 1500-1600‹ C. with a 4 to 5 hour soak period at full temperature to remove organic material and densify the alumina.
GB2495367A 1966-05-31 1967-05-30 Alumina Ceramic Substrates Expired GB1189853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US55366266A 1966-05-31 1966-05-31

Publications (1)

Publication Number Publication Date
GB1189853A true GB1189853A (en) 1970-04-29

Family

ID=24210258

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2495367A Expired GB1189853A (en) 1966-05-31 1967-05-30 Alumina Ceramic Substrates

Country Status (2)

Country Link
DE (1) DE1646738A1 (en)
GB (1) GB1189853A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210087115A1 (en) * 2016-12-08 2021-03-25 Siemens Aktiengesellschaft Erosion-resistant ceramic material, powder, slip and component

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210087115A1 (en) * 2016-12-08 2021-03-25 Siemens Aktiengesellschaft Erosion-resistant ceramic material, powder, slip and component
US11834377B2 (en) * 2016-12-08 2023-12-05 Siemens Energy Global GmbH & Co. KG Erosion-resistant ceramic material, powder, slip and component

Also Published As

Publication number Publication date
DE1646738A1 (en) 1971-08-05

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees