GB1510310A - Protection of silicon nitride artefacts - Google Patents

Protection of silicon nitride artefacts

Info

Publication number
GB1510310A
GB1510310A GB3683074A GB3683074A GB1510310A GB 1510310 A GB1510310 A GB 1510310A GB 3683074 A GB3683074 A GB 3683074A GB 3683074 A GB3683074 A GB 3683074A GB 1510310 A GB1510310 A GB 1510310A
Authority
GB
United Kingdom
Prior art keywords
oxide
silicon nitride
artefact
nitride
artefacts
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
GB3683074A
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB3683074A priority Critical patent/GB1510310A/en
Publication of GB1510310A publication Critical patent/GB1510310A/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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • 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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/591—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by reaction sintering
    • 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
    • C04B41/5025—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 ceramic 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
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics

Abstract

1510310 Surface coated silicon nitride artefacts UNITED KINGDOM ATOMIC ENERGY AUTHORITY 14 Aug 1975 [21 Aug 1974] 36830/74 Heading C1A [Also in Division B2] Silicon nitride artefacts coated with a surface layer of an oxide, other than aluminium oxide, whose thermodynamic stability is substantially equal to or is greater than aluminium oxide, are prepared by either decomposing a compound decomposable to such an oxide on the surface of an artefact comprising silicon nitride, or by shaping into a green artefact a powdery mixture of silicon, a binder and an oxide of the stated thermodynamic stability, debonding to remove the binder, and fixing in a nitriding atmosphere to convert the silicon to silicon nitride. The oxide may be that of an element of Group IIa, IIIa, or IVa or of the lanthanides or actinides of the Periodic Table. BeO, MgO and BaO are preferred; others exemplified include CaO, CeO 2 , HfO 2 , La 2 O 3 , SrO, ThO 2 , TiO 2 , UO 2 , Y 2 O 3 , ZrO 2 . The oxide may be present in a proportion of 0À5 to 5% by weight of the nitride. The coated nitride is preferably prepared by immersing the artefact in an aqueous solution of a suitable nitrate, drying, and calcining at less than 1000‹C The coating protects the artefact from attack by molten aluminium and is most usefully applied to refractory containers of porous silicon nitride.
GB3683074A 1975-08-14 1975-08-14 Protection of silicon nitride artefacts Expired GB1510310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3683074A GB1510310A (en) 1975-08-14 1975-08-14 Protection of silicon nitride artefacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3683074A GB1510310A (en) 1975-08-14 1975-08-14 Protection of silicon nitride artefacts

Publications (1)

Publication Number Publication Date
GB1510310A true GB1510310A (en) 1978-05-10

Family

ID=10391519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3683074A Expired GB1510310A (en) 1975-08-14 1975-08-14 Protection of silicon nitride artefacts

Country Status (1)

Country Link
GB (1) GB1510310A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501191A1 (en) * 1981-03-04 1982-09-10 Novatome Ind REFRACTORY MATERIAL PARTICULARLY FOR CONTACT WITH MOLTEN ALUMINUM AND METHOD OF MANUFACTURING THE SAME
US4581295A (en) * 1984-03-13 1986-04-08 Aluminum Company Of America Refractory assembly for containment of molten Al-Li alloys

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501191A1 (en) * 1981-03-04 1982-09-10 Novatome Ind REFRACTORY MATERIAL PARTICULARLY FOR CONTACT WITH MOLTEN ALUMINUM AND METHOD OF MANUFACTURING THE SAME
EP0060191A1 (en) * 1981-03-04 1982-09-15 Novatome Refractory material particularly suited to be contacted with molten aluminium, and process for its production
US4581295A (en) * 1984-03-13 1986-04-08 Aluminum Company Of America Refractory assembly for containment of molten Al-Li alloys

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee