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公开(公告)号：US11787728B2
公开(公告)日：2023-10-17
申请号：US17005769
申请日：2020-08-28
申请人： CORNING INCORPORATED
CPC分类号： C03C3/093 , C03C3/091 , C03C4/18 , C03C21/002 , C03C2204/00
摘要： Glass-based articles comprise stress profiles providing improved scratch resistance. The glass-based articles comprise: a thickness t; a lithium aluminosilicate composition; and a molar ratio of sodium oxide (Na2O) to lithium oxide (Li2O) that is less than or equal to 0.63 at the center of the glass-based article. The articles have a molar ratio of sodium dioxide (Na2O) to lithium dioxide (Li2O) in a post-spike near region that is greater than or equal to 0.9 and/or less than 1.5.
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公开(公告)号：US11561139B2
公开(公告)日：2023-01-24
申请号：US17157190
申请日：2021-01-25
申请人： CORNING INCORPORATED
摘要： Methods of improving the measurement of knee stress in an ion-exchanged chemically strengthened Li-containing glass sample that includes a knee are disclosed. One of the methods includes compensating for a shift in the location of the TIR-PR transition location associated with the critical angle location, wherein the shift is due to the presence of a leaky mode. Another method includes applying select criteria to the captured mode spectra image to ensure a high-quality image is used for the knee stress calculation. Another method combines direct and indirect measurements of the knee stress using the mode spectra from multiple samples to obtain greater accuracy and precision as compared to using either the direct measurement method or the indirect measurement method alone. Quality control methods of forming the glass samples using measured mode spectra and related techniques for ensuring an accurate measurement of the knee stress are also disclosed.
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公开(公告)号：US11312657B2
公开(公告)日：2022-04-26
申请号：US16458583
申请日：2019-07-01
申请人： CORNING INCORPORATED
摘要： Glass-based articles are manufactured by a unique ion exchange process that results in glass-based articles having improved stress profiles with higher stress values at moderate depths. A medium of the ion exchange process includes ions of two or more alkali metals of two or more alkali metal oxides in a base composition of a glass-based substrate in a ratio such that ions of each alkali metal are in chemical equilibrium with each of the respective alkali metals of the alkali metal oxides in the base glass composition.
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公开(公告)号：US11059744B2
公开(公告)日：2021-07-13
申请号：US15617302
申请日：2017-06-08
申请人： CORNING INCORPORATED
摘要： Chemically strengthened glass articles exhibiting superior resistance to damage when dropped onto an abrasive surface. The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The stress profile has a first region extending from the surface of the glass article to a depth d1 into the glass, wherein d1≤0.025t or ≤20 μm and has a maximum compressive stress of at least about 280 MPa at the surface, a second region extending from a depth of at least d1 to a second depth d2 and having a local compressive stress maximum, and a third region extending from a third depth d3 in the glass to a depth of compression DOC, wherein d2≤d3 and DOC≤0.15t. A method of strengthening a glass article to provide resistance to damage when dropped is also provided.
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公开(公告)号：US11021393B2
公开(公告)日：2021-06-01
申请号：US16296773
申请日：2019-03-08
申请人： CORNING INCORPORATED
摘要： A non-frangible glass article strengthened by a dual or two-step ion exchange (IOX) process, where the first IOX step leads to a depth of compressive layer FSM_DOL>0.1·t or, in some embodiments, FSM_DOL>0.15·t, where t is the thickness of the glass, is provided. The glass article has a compressive stress CS1 after the first IOX step at the surface of from 100 MPa to 400 MPa or, in some embodiments, from 150 MPa to 300 MPa. The first IOX step is followed by a second IOX step, leading to a “spike” compressive stress CS2 after the second IOX step at the surface of greater than 500 MPa or, in some embodiments, 700 MPa. The width of the spike generated by the second IOX is between 1 μm and 30 μm, or between 8 μm and 15 μm, using the criteria where the magnitude (absolute value) of the slope of the spike is higher than 20 MPa/μm.
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6.发明授权公开(公告)号：US10914721B2
公开(公告)日：2021-02-09
申请号：US16247078
申请日：2019-01-14
申请人： CORNING INCORPORATED
摘要： Methods of characterizing ion-exchanged chemically strengthened Li-containing glasses include: a) measuring a mode spectrum of the glass sample; b) using the mode spectrum, estimating a first contribution to the center tension associated with a spike region and estimating a second contribution to the center tension due to a deep region only, wherein the deep region is assumed to follow a power-law stress profile; and c) determining a total center tension by adding of the first and second contributions to the center tension. The methods can be used for quality control during manufacturing of glass samples by comparing the total center tension to a center tension specification that provides optimum strength and durability.
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公开(公告)号：US20210032151A1
公开(公告)日：2021-02-04
申请号：US17044003
申请日：2019-04-04
申请人： CORNING INCORPORATED
发明人： Rohit Rai , Vitor Marino Schneider
摘要： Methods of processing glass-based substrates to reduce birefringent defects and glass-based substrates are disclosed. In one embodiment, a method for processing a glass-based substrate includes rolling a glass-based material to form the glass-based substrate, and heat treating the glass-based substrate by increasing a temperate of the glass-based substrate, holding the temperature at a maximum temperature for a hold period, and then decreasing the temperature at one or more cooling rates, wherein after the heat treating, the glass-based substrate has a retardance over thickness of 5 nm/mm or less at locations outside of and including 5 mm from any corner of the glass-based substrate and outside of and including 5 mm from any edge of the glass-based substrate.
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公开(公告)号：US20200223750A1
公开(公告)日：2020-07-16
申请号：US16837286
申请日：2020-04-01
申请人： Corning Incorporated
发明人： Matthew John Dejneka , Pascale Oram , Rostislav Vatchev Roussev , Vitor Marino Schneider , Charlene Marie Smith , Zhongzhi Tang
摘要： A strengthened glass having a stress profile that differs from error-function and parabolic profiles. Stress relaxation and thermal annealing/diffusion effects, which occur at longer ion exchange and/or anneal times increase the depth of compression of the surface layer. A method of achieving these effects is also provided.
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公开(公告)号：US20200002225A1
公开(公告)日：2020-01-02
申请号：US16458583
申请日：2019-07-01
申请人： CORNING INCORPORATED
摘要： Glass-based articles are manufactured by a unique ion exchange process that results in glass-based articles having improved stress profiles with higher stress values at moderate depths. A medium of the ion exchange process includes ions of two or more alkali metals of two or more alkali metal oxides in a base composition of a glass-based substrate in a ratio such that ions of each alkali metal are in chemical equilibrium with each of the respective alkali metals of the alkali metal oxides in the base glass composition.
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10.发明申请公开(公告)号：US20190389764A1
公开(公告)日：2019-12-26
申请号：US15750051
申请日：2017-02-02
申请人： CORNING INCORPORATED
发明人： Ryan Claude Andrews , Jill Marie Hall , Pascale Oram , Rostislav Vatchev Roussev , Vitor Marino Schneider , Ljerka Ukrainczyk
摘要： A method of reworking lithium containing ion exchanged glass articles is provided. The method includes a reverse ion exchange process that returns the glass article to approximately the composition of the glass from which the glass article was produced, before being subjected to ion exchange. The reworked glass articles exhibit a K2O concentration profile comprising a portion wherein a K2O concentration increases to a local K2O concentration maximum.
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