Title:
The glass board for strengthening
Document Type and Number:
Japanese Patent JP6020455
Kind Code:
B2
Abstract:
To provide a glass plate to be tempered, which has a low thermal expansion coefficient at relatively low temperature, and which can have a sufficiently high surface compression stress by a conventional heat tempering process, even when it is thin. A glass plate to be tempered, which contains B 2 O 3 in a range of from 12.5 to 35 mol% in its composition, the difference [X-Y] between the total content X of compounds selected from MgO, CaO, BaO, Na 2 O and K 2 O in the composition and the content Y of B 2 O 3 in the composition being within a range of from -5 to 10 mol%, and which is to be tempered by heating and quenching.
Inventors:
Ono Enka
Akio Koike
Shinichi Yasuma
Setsuro Ito
Akio Koike
Shinichi Yasuma
Setsuro Ito
Application Number:
JP2013534749A
Publication Date:
November 02, 2016
Filing Date:
September 20, 2012
Export Citation:
Assignee:
Asahi Glass Co., Ltd.
International Classes:
C03C3/089; C03C3/091
Domestic Patent References:
| JP54028323A |
Foreign References:
| US5077240 |
Attorney, Agent or Firm:
Patent Business Corporation Sakura International Patent Office
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