JPS6418937A - Improved glass composition - Google Patents
Improved glass compositionInfo
- 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
Links
Landscapes
- 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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09208246A (en) * | 1995-10-16 | 1997-08-12 | Central Glass Co Ltd | Fireproof glass |
Citations (3)
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 |
-
1987
- 1987-07-13 JP JP17294587A patent/JPS6418937A/en active Granted
Patent Citations (3)
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)
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 |