FR2211421A1 - Reducing porosity of silicon nitride - by introducing liquids contg refractory heating to ppte refractory oxide to fill pores - Google Patents

Reducing porosity of silicon nitride - by introducing liquids contg refractory heating to ppte refractory oxide to fill pores

Info

Publication number
FR2211421A1
FR2211421A1 FR7343125A FR7343125A FR2211421A1 FR 2211421 A1 FR2211421 A1 FR 2211421A1 FR 7343125 A FR7343125 A FR 7343125A FR 7343125 A FR7343125 A FR 7343125A FR 2211421 A1 FR2211421 A1 FR 2211421A1
Authority
FR
France
Prior art keywords
ppte
refractory
heating
pref
silicon nitride
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.)
Granted
Application number
FR7343125A
Other languages
French (fr)
Other versions
FR2211421B1 (en
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.)
Advanced Materials Engineering Ltd
Original Assignee
Advanced Materials Engineering Ltd
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 Advanced Materials Engineering Ltd filed Critical Advanced Materials Engineering Ltd
Publication of FR2211421A1 publication Critical patent/FR2211421A1/en
Application granted granted Critical
Publication of FR2211421B1 publication Critical patent/FR2211421B1/fr
Granted 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Products (AREA)
  • Catalysts (AREA)

Abstract

Porosity of Si3N4 having accessible pores is reduced by introducing a liquid and heating the Si3N4 to form a refractory ppte. pref. an oxide, within Si3N4. Liquid is pref. a soln. of ppte. precursor, e.g. a soln. of CrO3 leading to pptn. of Cr2O3 after drying and heating, pref. to 500-800 degrees C. Other oxide ppte. precursors may be used, partic. cpds. of Ni, Al, Mg, Th, Ce, Be, Si, esp. as the nitrates. Filling treatment may be repeated. A pref. additional treatment is the introduction of an oxyacid of P, or a soln. thereof, pref. H3PO4, and progressive heating to 800 degrees C.
FR7343125A 1972-12-04 1973-12-04 Reducing porosity of silicon nitride - by introducing liquids contg refractory heating to ppte refractory oxide to fill pores Granted FR2211421A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5591172 1972-12-04

Publications (2)

Publication Number Publication Date
FR2211421A1 true FR2211421A1 (en) 1974-07-19
FR2211421B1 FR2211421B1 (en) 1977-03-04

Family

ID=10475202

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7343125A Granted FR2211421A1 (en) 1972-12-04 1973-12-04 Reducing porosity of silicon nitride - by introducing liquids contg refractory heating to ppte refractory oxide to fill pores

Country Status (2)

Country Link
DE (1) DE2360434A1 (en)
FR (1) FR2211421A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339584A1 (en) * 1976-01-30 1977-08-26 Norton Co PROCESS FOR REINFORCING PIECES IN SRIED SILICON NITRIDE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1595169A (en) * 1967-12-20 1970-06-08
FR2059082A5 (en) * 1969-08-22 1971-05-28 Atomic Energy Authority Uk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1595169A (en) * 1967-12-20 1970-06-08
FR2059082A5 (en) * 1969-08-22 1971-05-28 Atomic Energy Authority Uk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339584A1 (en) * 1976-01-30 1977-08-26 Norton Co PROCESS FOR REINFORCING PIECES IN SRIED SILICON NITRIDE

Also Published As

Publication number Publication date
FR2211421B1 (en) 1977-03-04
DE2360434A1 (en) 1974-06-12

Similar Documents

Publication Publication Date Title
AU469462B2 (en) Aflow meter provided witha vortex chamber
ZA726315B (en) New polyepoxide-polysiloxane compounds,processes for their manufacture and their use
IT975575B (en) CONTAINER FOR THE TREATMENT OF THE CONTENT BY MAKING IT PASS THROUGH TOWARDS ELECTRICITY
IL43680A0 (en) The preparation of cycloalkanones and/or cycloalkanols
ZA711640B (en) Method of proportioning fluid flow,and valve therefor
AU4292272A (en) Method of coating teeth witha durable glaze
GB1407945A (en) Process for the manufacture of aldehydes and ethers for use therein
FR2211421A1 (en) Reducing porosity of silicon nitride - by introducing liquids contg refractory heating to ppte refractory oxide to fill pores
FR2224557A1 (en) Non-stick coatings for cooking utensils - porous enamel coatings filled with silicones are superior to ptfe.
CH538877A (en) Containers with separately stored, mutually reactive substances for the production of ready-to-use dental preparations
AU462854B2 (en) Treatment of liquids with gas
BE787601A (en) AQUEOUS COMPOSITIONS OF CYCLIC SULPHONIC AMPHIONS AND COLLOIDAL SOILS, INTENDED FOR COATINGS
IT953426B (en) METHOD FOR THE CRYSTALLATION OF FRUCTOSE FROM AN AQUEOUS SOLUTION
AR192363A1 (en) PROCEDURE FOR THE PREPARATION OF AN INJECTABLE SUSPENSION CONTAINING LONG-ACTIVATED GONADOTROPINS
CA1017337A (en) Macrocyclic compounds capable of cryptate formation and their preparation
CA989873A (en) Catalytic production of 1,1-difluoroethane
CS182980B1 (en) Piston combustion engine with rotary combustion chamber in the form of one-section rotary hyperboloid or similar form
HK10476A (en) Treatment of sewage
CA937577A (en) Process for the selective oxidation of ketones
YU105172A (en) Process for the electrochemical purification of waste-water
FR2233073A1 (en) Implantable pharmaceutical substance - released uniformly and slowly from the pores of a carrier material
IL40318A (en) The preparation of cis-7,8-epoxy-2-methyloctadecane
NL7104842A (en) Passivating pyrophoric powder - by suspending in org liquid and treating with oxygen
CA966234A (en) Treatment of sewage
ZA721617B (en) Process for the preparation of ketazines

Legal Events

Date Code Title Description
ST Notification of lapse