Lithium containing aluminosilicate glass with low expansion after chemical toughening

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United States of America

PATENT NO 12006255
SERIAL NO

16552326

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A chemically toughenable or toughened glass has, before chemical toughening, a thickness t of at most 1100 μm. The glass comprises the following components: 45-75 mol-% SiO2; 10-25 mol-% Al2O3; >1-11 mol-% Li2O; 0-15 mol-% P2O5; 0-8 mol-% B2O3; and 0-5 mol-% TiO2. The average number of bridging oxygen per polyhedron (BO) calculated as 2*4−2*(cmol(O)/(cmol(Si)+cmol(Al)+cmol(B)+cmol(P)+cmol(Ti))) is higher than 3.55. Upon chemical toughening, the linear dimension variation in the unit of percentage (V1) is so low that the overall geometry variation (OGV) calculated as (DoL/t)/V1 is higher than 0.8. DoL is the total depth of all ion-exchange layers on one side of the glass and DoL is more than 1 μm, when the glass is chemically toughened with NaNO3 only, KNO3 only or with both KNO3 and NaNO3.

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Patent Owner(s)

Patent OwnerAddress
SCHOTT GLASS TECHNOLOGIES (SUZHOU) CO LTD215009 79 HUOJU ROAD SCIENCE AND TECHNOLOGY INDUSTRIAL PARK SUZHOU NEW DISTRICT JIANGSU PROVINCE SUZHOU CITY JIANGSU PROVINCE 215009

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Da, Ning Jiangsu, CN 19 62
He, Feng Jiangsu, CN 194 1424
Xue, Junming Shanghai, CN 11 26
Zimmer, Jose Eppstein, DE 44 1051

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