GB810491A - Oxidation resistant graphite articles - Google Patents

Oxidation resistant graphite articles

Info

Publication number
GB810491A
GB810491A GB373756A GB373756A GB810491A GB 810491 A GB810491 A GB 810491A GB 373756 A GB373756 A GB 373756A GB 373756 A GB373756 A GB 373756A GB 810491 A GB810491 A GB 810491A
Authority
GB
United Kingdom
Prior art keywords
phosphoric acid
blocks
per cent
colloidal silica
solution
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
GB373756A
Inventor
Joseph Charles Fisher Jr
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Priority to GB373756A priority Critical patent/GB810491A/en
Publication of GB810491A publication Critical patent/GB810491A/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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/5092—Phosphate cements
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Ceramic Products (AREA)

Abstract

A graphite article of increased strength and oxidation resistance is produced by impregnation with colloidal silica and phosphoric acid. The article may be first impregnated with an aqueous colloidal silica solution and dried, and then treated with an aqueous phosphoric acid solution and dried, the molar ratio of silica introduced to phosphoric acid introduced preferably being 1 to 0.2-3.7. Alternatively the article may be treated with a single aqueous solution containing colloidal silica and phosphoric acid in a molar ratio of 1 to 0.7-15 and at a pH of less than 6. In the example graphite blocks having a permeability of 70 millidarcys and a flexural strength of 2800 p.s.i. are impregnated with a 30 per cent colloidal silica solution at a pressure of 10 mm. of mercury, 4.8-6.6 per cent of silica being absorbed. The blocks are then dried at 100-150 DEG C. for 16-24 hours. The blocks are then impregnated at atmospheric pressure with 30 per cent phosphoric acid solution, 1-6 per cent of phosphoric acid being absorbed. The blocks are then heated at 150 DEG C. until dry. Two tables specifying oxidation loss and flexural strength, respectively, are given.
GB373756A 1956-02-07 1956-02-07 Oxidation resistant graphite articles Expired GB810491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB373756A GB810491A (en) 1956-02-07 1956-02-07 Oxidation resistant graphite articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB373756A GB810491A (en) 1956-02-07 1956-02-07 Oxidation resistant graphite articles

Publications (1)

Publication Number Publication Date
GB810491A true GB810491A (en) 1959-03-18

Family

ID=9764002

Family Applications (1)

Application Number Title Priority Date Filing Date
GB373756A Expired GB810491A (en) 1956-02-07 1956-02-07 Oxidation resistant graphite articles

Country Status (1)

Country Link
GB (1) GB810491A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042135A1 (en) * 1996-05-02 1997-11-13 Alliedsignal Inc. Improved oxidation protection for carbon/carbon composites and graphites
US5962135A (en) * 1997-04-09 1999-10-05 Alliedsignal Inc. Carbon/carbon friction material
US6114006A (en) * 1997-10-09 2000-09-05 Alliedsignal Inc. High thermal conductivity carbon/carbon honeycomb structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042135A1 (en) * 1996-05-02 1997-11-13 Alliedsignal Inc. Improved oxidation protection for carbon/carbon composites and graphites
US5962135A (en) * 1997-04-09 1999-10-05 Alliedsignal Inc. Carbon/carbon friction material
US6114006A (en) * 1997-10-09 2000-09-05 Alliedsignal Inc. High thermal conductivity carbon/carbon honeycomb structure

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