JPS6418937A - Improved glass composition - Google Patents

Improved glass composition

Info

Publication number
JPS6418937A
JPS6418937A JP17294587A JP17294587A JPS6418937A JP S6418937 A JPS6418937 A JP S6418937A JP 17294587 A JP17294587 A JP 17294587A JP 17294587 A JP17294587 A JP 17294587A JP S6418937 A JPS6418937 A JP S6418937A
Authority
JP
Japan
Prior art keywords
glass composition
na2o
poise
al2o3
sio2
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
JP17294587A
Other languages
Japanese (ja)
Other versions
JPH0449495B2 (en
Inventor
Shinichi Araya
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.)
Central Glass Co Ltd
Original Assignee
Central Glass Co 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 Central Glass Co Ltd filed Critical Central Glass Co Ltd
Priority to JP17294587A priority Critical patent/JPS6418937A/en
Publication of JPS6418937A publication Critical patent/JPS6418937A/en
Publication of JPH0449495B2 publication Critical patent/JPH0449495B2/ja
Granted legal-status Critical Current

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  • Glass Compositions (AREA)

Abstract

PURPOSE:To enable formation of a glass composition having excellent weather resistance, not being made into fine pieces in destruction, readily providing strength about 1.5-2.5 times the strength of raw plate glass, by using a specific glass composition. CONSTITUTION:The glass composition has the following composition. Namely 72.7-74.2wt.% SiO2, 1.6-3.0wt.% Al2O3, 6.5-8.5wt.% CaO, 2.0-4.0wt.% MgO, 10.5-13.0wt.% Na2O, 0.5-3.0wt.% K2O, >=97wt.% sum of these components and further 74.7-76.7wt.% SiO2+Al2O3, 9.0-12.0wt.% CaO+MgO and 12.0-14.5wt.% Na2O+K2O. The glass composition is required to have 635-665 deg.C viscosity temperature to become 10<10> poise and 545-565 deg.C viscosity temperature to become 10<13> poise and difference in both the temperatures of 95-103 deg.C.
JP17294587A 1987-07-13 1987-07-13 Improved glass composition Granted JPS6418937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17294587A JPS6418937A (en) 1987-07-13 1987-07-13 Improved glass composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17294587A JPS6418937A (en) 1987-07-13 1987-07-13 Improved glass composition

Publications (2)

Publication Number Publication Date
JPS6418937A true JPS6418937A (en) 1989-01-23
JPH0449495B2 JPH0449495B2 (en) 1992-08-11

Family

ID=15951264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17294587A Granted JPS6418937A (en) 1987-07-13 1987-07-13 Improved glass composition

Country Status (1)

Country Link
JP (1) JPS6418937A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0393643A (en) * 1989-08-14 1991-04-18 Ppg Ind Inc Flat glass composition
JP2012178212A (en) * 2011-02-01 2012-09-13 Asahi Glass Co Ltd Method of manufacturing glass substrate for magnetic disk
WO2014174968A1 (en) * 2013-04-24 2014-10-30 旭硝子株式会社 Molten glass conduit structure, and device and method using conduit structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09208246A (en) * 1995-10-16 1997-08-12 Central Glass Co Ltd Fireproof glass

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249010A (en) * 1975-10-17 1977-04-19 Hitachi Denshi Ltd Method of forming gaps of magnetic head
JPS5440815A (en) * 1977-09-06 1979-03-31 Asahi Glass Co Ltd Glass for fiber use
JPS5523221A (en) * 1978-08-03 1980-02-19 Ebisu Kiko Kk Simultaneous driver for steel sheet-piles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249010A (en) * 1975-10-17 1977-04-19 Hitachi Denshi Ltd Method of forming gaps of magnetic head
JPS5440815A (en) * 1977-09-06 1979-03-31 Asahi Glass Co Ltd Glass for fiber use
JPS5523221A (en) * 1978-08-03 1980-02-19 Ebisu Kiko Kk Simultaneous driver for steel sheet-piles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0393643A (en) * 1989-08-14 1991-04-18 Ppg Ind Inc Flat glass composition
JP2012178212A (en) * 2011-02-01 2012-09-13 Asahi Glass Co Ltd Method of manufacturing glass substrate for magnetic disk
WO2014174968A1 (en) * 2013-04-24 2014-10-30 旭硝子株式会社 Molten glass conduit structure, and device and method using conduit structure
CN105121363A (en) * 2013-04-24 2015-12-02 旭硝子株式会社 Molten glass conduit structure, and device and method using conduit structure
JPWO2014174968A1 (en) * 2013-04-24 2017-02-23 旭硝子株式会社 Molten glass conduit structure, apparatus and method using the conduit structure
US9637407B2 (en) 2013-04-24 2017-05-02 Asahi Glass Company, Limited Molten glass conduit structure, and device and method using conduit structure

Also Published As

Publication number Publication date
JPH0449495B2 (en) 1992-08-11

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees