Abstract:
Glass compositions and glass articles comprising the glass compositions are disclosed. In one embodiment, a glass composition includes from about 65 mol. % to about 70 mol. % SiO2; from about 9 mol. % to about 14 mol. % Al2O3; and from about 0 mol. % to about 11 mol. % B2O3 as glass network formers. The glass composition also includes from about 5 mol. % to less than 10 mol. % alkali oxide R2O, wherein R is at least one of Li, Na, and K. The glass composition also includes from about 3 mol. % to about 11 mol. % of divalent oxide MO, wherein M is at least one of Mg, Ca, Ba, SrO and Zn. The glass composition has a coefficient of thermal expansion which is less than or equal to 55×10-7/° C. and is amenable to strengthening by ion-exchange. The glass composition is well suited for use as the glass cladding layers of a laminated glass article.
Abstract:
A method of making a glass having antimicrobial properties and high compressive stress. The method includes a first ion exchange step in which potassium cations are exchanged for sodium cations in the base glass to provide a surface layer under compressive stress, followed by a second ion exchange in which silver cations are exchanged for potassium and lithium ions in the glass to produce the antimicrobial glass. In some embodiments, the antimicrobial glass has a maximum compressive stress that is at least 80% of the maximum compressive stress obtained by the potassium-for-sodium exchange in the first bath. A base glass and an ion exchanged glass antimicrobial having antimicrobial properties are also provided.
Abstract:
A borophosphate glass composition including B2O3, P2O5, and CaO, and optionally a source additive selected from: Li2O, Na2O, K2O, Al2O3, ZnO, MgO, Fe2O3/FeO, CuO/Cu2O, and mixtures thereof, as defined herein. Also disclosed are bioactive compositions or substrates including the disclosed borophosphate glass composition, and at least one live cell. Also disclosed are methods of inhibiting or increasing the relative amount of species containing boron, phosphorous, or both, being released into an aqueous solution from aborophosphate glass composition defined herein. Also disclosed is a method of proliferating cells on a bioactive substrate as defined herein. Also disclosed are related glass compositions that exclude one of B2O3, P2O5, and CaO.
Abstract:
Alkali-doped boroaluminosilicate glasses are provided. The glasses include the network formers SiO2, B2O3, and Al2O3. The glass may, in some embodiments, have a Young's modulus of less than about 65 GPa and/or a coefficient of thermal expansion of less than about 40×10−7/° C. The glass may be used as a cover glass for electronic devices, a color filter substrate, a thin film transistor substrate, or an outer clad layer for a glass laminate.
Abstract:
Low CTE glass compositions and glass articles formed from the same are described. In one embodiment, a glass composition includes from about 60 mol. % to about 66 mol. % SiO2; from about 7 mol. % to about 10 mol. % AI2O3; and from about 14 mol. % to about 18 mol. % B2O3 as glass network formers. The glass composition may further include from about 9 mol. % to about 16 mol. % alkaline earth oxide. The alkaline earth oxide includes at least CaO. The CaO may be present in the glass composition in a concentration from about 3 mol. % to about 12 mol. %. The glass composition is free from alkali metals. The glass composition has a coefficient of thermal expansion which is less than or equal to 40×10−7/° C. averaged over the temperature range from about 20° C. to 300° C. The glass composition is particularly well suited for use as a glass cladding layer in a laminated glass article.
Abstract:
Alkali-doped and alkali-free boroaluminosilicate glasses that include barium oxide and the network formers SiO2, B2O3, and Al2O3. The glasses may be doped with up to about 1 mol % of Li2O, Na2O, and/or K2O. The glass may, in some embodiments, have a Young's modulus of less than about 61 GPa and/or a coefficient of thermal expansion, averaged over a temperature range from about 20° C. to about 300° C., of less than about 40×10−7/° C. These glasses may be used as a cover glass for electronic devices, a color filter substrate, a thin film transistor substrate, or an outer clad layer for a glass laminate.
Abstract:
According to one embodiment, a glass may include from about 50 mol. % to about 70 mol. % SiO2; from about 12 mol. % to about 35 mol. % B2O3; from about 4 mol. % to about 12 mol. % Al2O3; greater than 0 mol. % and less than or equal to 1 mol. % alkali metal oxide, wherein Li2O is greater than or equal to about 20% of the alkali metal oxide; from about 0.3 mol. % to about 0.7 mol. % of Na2O or Li2O; and greater than 0 mol. % and less than 12 mol. % of total divalent oxide, wherein the total divalent oxide includes at least one of CaO, MgO and SrO, and wherein a ratio of Li2O (mol. %) to (Li2O (mol. %) +(Na2O (mol. %)) is greater than or equal 0.4 and less than or equal to 0.6. The glass may have a relatively low high temperature resistivity and a relatively high low temperature resistivity.
Abstract:
Computer-implemented methods and apparatus are provided for predicting/estimating (i) a non-equilibrium viscosity for at least one given time point in a given temperature profile for a given glass composition, (ii) at least one temperature profile that will provide a given non-equilibrium viscosity for a given glass composition, or (iii) at least one glass composition that will provide a given non-equilibrium viscosity for a given time point in a given temperature profile. The methods and apparatus can be used to predict/estimate stress relaxation in a glass article during forming as well as compaction, stress relaxation, and/or thermal sag or thermal creep of a glass article when the article is subjected to one or more post-forming thermal treatments.
Abstract:
Borosilicate glasses are disclosed having (in weight %) 66-76% SiO2, 0-8% Al2O3, 10-18% B2O3, 0-4% Li2O, 0-12% Na2O, 0-12% K2O, 1-1.5% Ag, 1.5-2.5% Cl− and 0.01-0.06% of a summed amount of CuO and NiO, wherein the glass composition is bleachable upon exposure to ultraviolet irradiation from a stable state color or shade to a lighter color or shade. Such reverse photochromic borosilicate glass compositions may be thermally darkenable. The borosilicate glasses may be strengthened via ion-exchange strengthening treatment. The borosilicate glasses may retain their reverse photochromic and thermally darkenable properties even after ion-exchange strengthening treatment.
Abstract translation:公开了硼硅酸盐玻璃,其具有(重量%)66-76%SiO 2,0-8%Al 2 O 3,10-18%B 2 O 3,0-4%Li 2 O,0-12%Na 2 O,0-12%K 2 O,1-1.5% Ag,1.5-2.5%Cl-和0.01-0.06%的总计量的CuO和NiO,其中玻璃组合物在从稳定状态的颜色或阴影暴露于较浅的颜色或阴影的紫外线照射下是可漂白的。 这种反相光致变色硼硅玻璃组合物可以是热可黑化的。 可以通过离子交换强化处理来加强硼硅酸盐玻璃。 即使在离子交换强化处理之后,硼硅酸盐玻璃也可以保持其反相光致变色和热可黑化性能。
Abstract:
A method of treating a substrate is provided that includes the steps: submersing a substrate having an outer region containing a plurality of divalent exchangeable ions in a bath that comprises a polar solvent and a plurality of divalent ion-exchanging ions, the substrate comprising a glass, glass-ceramic or ceramic; pressurizing the bath to a predetermined pressure substantially above ambient pressure; and heating the bath to a predetermined temperature above ambient temperature. The method also includes a step of treating the substrate for a predetermined ion-exchange duration such that a portion of the plurality of divalent exchangeable ions is exchanged with a portion of the divalent ion-exchanging ions. In addition, the step of treating the substrate results in a greater number of divalent ion-exchanging ions entering the substrate than divalent exchangeable ions exiting the substrate.