发明名称 |
CHEMISCH HÄRTBARE, BORFREIE FLOAT-GLASZUSAMMENSETZUNGEN |
摘要 |
A glass composition capable of being chemically strengthened by ion-exchange within 100 hours to provide a glass with a surface compressive stress of greater then 400 MPa and an ion-exchange depth greater then 200 microns comprising: SiO2 58% to 70% (by weight), Al2O3 5% to 15%, Na2O 12% to 18%, K2O 0.1% to 5%, MgO 4% to 10%, CaO 0% to 1% with the provisos that the total of the Al2O3 and MgO is in excess of 13%, the total of the amounts of Al2O3 plus MgO divided by the amount of K2O is at least 3 and that the sum of the amounts of Na2O, K2O and MgO is at least 22%. |
申请公布号 |
DE69900721(D1) |
申请公布日期 |
2002.02.21 |
申请号 |
DE1999600721 |
申请日期 |
1999.03.19 |
申请人 |
PILKINGTON PLC, ST. HELENS |
发明人 |
BRADSHAW, MICHAEL;SMITH, HEATON;TORR, CARL;LYTHGOE, STANLEY |
分类号 |
C03C3/085;C03C3/087;C03C21/00;(IPC1-7):C03C3/085 |
主分类号 |
C03C3/085 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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