DE2064528B1 - Transparent glass ceramics - with small thermal expansion coefficients contg hexagonal quartz mixed crystals - Google Patents

Transparent glass ceramics - with small thermal expansion coefficients contg hexagonal quartz mixed crystals

Info

Publication number
DE2064528B1
DE2064528B1 DE19702064528 DE2064528A DE2064528B1 DE 2064528 B1 DE2064528 B1 DE 2064528B1 DE 19702064528 DE19702064528 DE 19702064528 DE 2064528 A DE2064528 A DE 2064528A DE 2064528 B1 DE2064528 B1 DE 2064528B1
Authority
DE
Germany
Prior art keywords
delta
contg
thermal expansion
approx
transparent glass
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
DE19702064528
Other languages
German (de)
Other versions
DE2064528C2 (en
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 filed Critical
Priority to DE19702064528 priority Critical patent/DE2064528B1/en
Publication of DE2064528B1 publication Critical patent/DE2064528B1/en
Application granted granted Critical
Publication of DE2064528C2 publication Critical patent/DE2064528C2/de
Granted 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
    • C03C10/0018—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 monovalent metal oxide as main constituents
    • C03C10/0027—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 monovalent metal oxide as main constituents containing SiO2, Al2O3, Li2O as main constituents

Abstract

The ceramic has a thermal expansion coefficient 19 x 10-7/degrees C (20-300 degrees C) and a S.G. within 0.5% of starting material is prepn. from glasses contg. finely divided oxides by heat treatment pref. of compsn. (in mol. %) SiO2 45-55; Al2O3 22-27; P2O5 2.5-6.5; MgO 0-15; Li2O 5-17; ZnO 0-7; TiO2 1-5; ZrO 0-2.5; K2O or Na2O 0.3-1; As2O3 0.2-1 and TiO + ZrO2 >=2.5. The calculated content xi of components Si2O4 (x1), AlPO4 (x2), Li2Al2O4 (x3), MgAl2O4 (x4) and ZnAl2O4 (x5) comprise at least 80% of the glass and the equation 5 SIGMA xi DELTA Vi = O for coefficients DELTA V1 approx. - 10, DELTA V2 approx. -5, DELTA V3 approx. + 20, DELTA V4 approx. + 12 and + 10 = DELTA V5 20 is satisfied.
DE19702064528 1970-12-30 1970-12-30 Transparent glass ceramics - with small thermal expansion coefficients contg hexagonal quartz mixed crystals Granted DE2064528B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19702064528 DE2064528B1 (en) 1970-12-30 1970-12-30 Transparent glass ceramics - with small thermal expansion coefficients contg hexagonal quartz mixed crystals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702064528 DE2064528B1 (en) 1970-12-30 1970-12-30 Transparent glass ceramics - with small thermal expansion coefficients contg hexagonal quartz mixed crystals

Publications (2)

Publication Number Publication Date
DE2064528B1 true DE2064528B1 (en) 1972-01-13
DE2064528C2 DE2064528C2 (en) 1972-08-17

Family

ID=5792602

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702064528 Granted DE2064528B1 (en) 1970-12-30 1970-12-30 Transparent glass ceramics - with small thermal expansion coefficients contg hexagonal quartz mixed crystals

Country Status (1)

Country Link
DE (1) DE2064528B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023101844A1 (en) * 2021-11-30 2023-06-08 Corning Incorporated Lithium phosphoalumino silicate glasses with fast effective inter-diffusivity

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4704585B2 (en) * 2000-07-07 2011-06-15 株式会社オハラ Low expansion transparent crystallized glass, crystallized glass substrate and optical waveguide device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023101844A1 (en) * 2021-11-30 2023-06-08 Corning Incorporated Lithium phosphoalumino silicate glasses with fast effective inter-diffusivity

Also Published As

Publication number Publication date
DE2064528C2 (en) 1972-08-17

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee