GB848447A - Ceramic articles and processes for their production - Google Patents

Ceramic articles and processes for their production

Info

Publication number
GB848447A
GB848447A GB2806756A GB2806756A GB848447A GB 848447 A GB848447 A GB 848447A GB 2806756 A GB2806756 A GB 2806756A GB 2806756 A GB2806756 A GB 2806756A GB 848447 A GB848447 A GB 848447A
Authority
GB
United Kingdom
Prior art keywords
pbo
bao
cao
mgo
zno
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
GB2806756A
Inventor
Popescu Dumitru Has
Lungu Niculae Stelian
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.)
MINI FOR CONSTRUCTION OF M
Original Assignee
MINI FOR CONSTRUCTION OF M
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
Priority to BE556740D priority Critical patent/BE556740A/xx
Priority to IT558126D priority patent/IT558126A/it
Priority to DD22465D priority patent/DD22465A/xx
Priority to DEM31608A priority patent/DE1095186B/en
Priority to FR1159785D priority patent/FR1159785A/en
Application filed by MINI FOR CONSTRUCTION OF M filed Critical MINI FOR CONSTRUCTION OF M
Priority to GB2806756A priority patent/GB848447A/en
Publication of GB848447A publication Critical patent/GB848447A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/16—Halogen containing crystalline phase
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
    • C03C10/0045—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents containing SiO2, Al2O3 and MgO as main constituents

Abstract

848,447. Glass manufacture. ROUMANIA, MINISTER FOR THE CONSTRUCTIONAL MATERIALS INDUSTRY OF. Sept. 13, 1956, No. 28067/56. Class 56. Glass is devitrified to a porcelanous or earthenware-like structure consisting essentially of a single type of silicate in a process comprising preparing a completely vitreous batch of SiO 2 + Al 2 O 3 + MgO + CaO + BaO+ ZnO + PbO + Na 2 O + K 2 O, a part of the oxygen being replaced by fluorine, the molar ratio (SiO 2 + Al 2 O 3 ) : (MgO + CaO + BaO + ZnO + PbO + Na 2 O + K 2 0) lying between 1.5 and 4 and the atomic ratio O : F between 5 and 15, and shaping the fused mass and subjecting it to a heat treatment in the cooled vitreous state at a temperature below the melting point of the material, such that microcrystals of fluoride are formed and serve as nuclei in the formation of uniform silicate crystals. A composition is specified in which percentages by weight are 70-85 SiO 2 + Al 2 O 3 ; 0-10 Na 2 O + K 2 O; 10-25 MgO + CaO + BaO + ZnO + PbO; and 3-8 F. This composition is fused at between 1300‹ and 1500‹C. and the subsequent crystallisations heat treatment is effected at between 600‹ and 1000‹C.
GB2806756A 1956-09-01 1956-09-13 Ceramic articles and processes for their production Expired GB848447A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE556740D BE556740A (en) 1956-09-13
IT558126D IT558126A (en) 1956-09-13
DD22465D DD22465A (en) 1956-09-13
DEM31608A DE1095186B (en) 1956-09-01 1956-09-01 Process for the production of molded articles from ceramic masses
FR1159785D FR1159785A (en) 1956-09-13 1956-09-10 Vitrified ceramic materials and their manufacturing process
GB2806756A GB848447A (en) 1956-09-13 1956-09-13 Ceramic articles and processes for their production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2806756A GB848447A (en) 1956-09-13 1956-09-13 Ceramic articles and processes for their production

Publications (1)

Publication Number Publication Date
GB848447A true GB848447A (en) 1960-09-14

Family

ID=10269743

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2806756A Expired GB848447A (en) 1956-09-01 1956-09-13 Ceramic articles and processes for their production

Country Status (5)

Country Link
BE (1) BE556740A (en)
DD (1) DD22465A (en)
FR (1) FR1159785A (en)
GB (1) GB848447A (en)
IT (1) IT558126A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839055A (en) * 1971-02-24 1974-10-01 Corning Glass Works Tetrasilicic mica glass-ceramic article
US3955990A (en) * 1969-05-14 1976-05-11 Saint-Gobain Industries Vitroceramics

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331731A (en) * 1962-11-14 1967-07-18 Owens Illinois Inc Method of and article formed by sealing alumina ceramic to a metal with a sealant glass
US4386162A (en) * 1981-10-05 1983-05-31 Corning Glass Works Alkali metal, calcium fluorosilicate glass-ceramic articles
US4397670A (en) * 1981-10-05 1983-08-09 Corning Glass Works Method of making alkali metal, calcium fluorosilicate glass-ceramic articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955990A (en) * 1969-05-14 1976-05-11 Saint-Gobain Industries Vitroceramics
US3839055A (en) * 1971-02-24 1974-10-01 Corning Glass Works Tetrasilicic mica glass-ceramic article

Also Published As

Publication number Publication date
IT558126A (en)
BE556740A (en)
DD22465A (en)
FR1159785A (en) 1958-07-02

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