Abstract: A glass substrate formed from a glass composition is disclosed. In embodiments, the composition comprises: from 60 mol. % to 75 mol. % SiO2; from 2 mol. % to 15 mol. % Li2O; from 1.9 mol. % to 15 mol. % Y2O3; and at least one of B2O3 and Na2O. B2O3+Na2O is from 2 mol. % to 13 mol. %. Y2O3+Al2O3 is from 10 mol. % to 24 mol. %. A ratio R2O/Al2O3 is from 0.5 to 4, where R2O is a total concentration of Li2O, Na2O, K2O, Rb2O, and Cs2O. (R2O+RO)/Al2O3 is from 0.5 to 4.5, where RO is a total concentration of BeO, MgO, CaO, SrO, and BaO. The glass substrate has a Young's modulus from 75 gigapascals (GPa) to 110 GPa. The glass substrate is ion exchangeable to form a strengthened glass article.

Abstract: Strengthened glass-based substrates having a first outer region compressive stress and a first side having first coating thereon are disclosed. The first coating comprising a material selected to have a first coating Young's modulus value, a first coating thickness, and a first coating stress that is either neutral or compressive, such that the absolute value of first outer region compressive stress is greater than the absolute value of the first coating stress. Methods of making glass-based articles are provided, and glass-based articles having coatings that provide different strength values and/or reliability on different sides of the glass-based articles are also disclosed.

Abstract: A three dimensional glass ceramic article with a thickness between 0.1 mm and 2 mm, having a dimensional precision control of less than or equal to ±0.1 mm. A method for forming a three dimensional glass ceramic article including placing a nucleated glass article into a mold, and heating the nucleated glass article to a crystallization temperature, where the nucleated glass article is in the mold during the heating. Then, holding the nucleated glass article at the crystallization temperature for a duration sufficient to crystallize the nucleated glass article and form a three dimensional glass ceramic article, where the nucleated glass article is in the mold during the holding, and removing the three dimensional glass ceramic article from the mold.

Abstract: Methods of enhanced ion exchange (IOX) include exposing a substrate to a bath mixture that includes a second salt dissolved in a first salt, the second salt includes the same metal ion as the first salt with an anion different from the first salt. The first salts are conventional nitrate salts into which one or more second salts, for example, carbonate, sulfate, chloride, fluorine, borate, or phosphate salts are dissolved. The second salts remain at or below their solubility limits in the first salts. Any poisoning ions remain at or below their solubility limits in the bath mixture. Glass-based articles made therefrom and electronic devices incorporating the glass-based articles are also disclosed.

Abstract: Electronic device components that include a glass portion and a ceramic or a glass ceramic portion are disclosed. The ceramic or glass ceramic portions of the component may be located to provide desired performance characteristics to the component, which may be an enclosure component. In addition, regions of compressive stress may be formed within the glass portion, the glass ceramic portion, or both to further adjust the performance characteristics of the component. Electronic devices including the components and methods for making the components are also provided.

Abstract: The present invention relates to an article comprising at least one glass-ceramic substrate, in particular a plate, intended, for example, to cover or receive at least one heating element, said substrate exhibiting, in at least one zone, a surface roughness such that the characteristic dimensions of the patterns forming said roughness are between 2 and 100 ?m. The present invention also relates to an advantageous process for producing said substrate.

Abstract: Glass-ceramic articles are manufactured by an ion exchange process that results in glass-based articles having improved stress profiles. A knee may be located at a depth of 3 microns or deeper. A compressive stress at a surface may be 200 MPa or more and at a knee may be 20 MPa or more. A non-sodium oxide may have a non-zero concentration that varies from the first surface to a depth and a depth of compression (DOC) may be located at 0.10·t, or even at 0.17·t or deeper. A two-step ion exchange (DIOX) includes, for example, a potassium bath in a first treatment to form a spike in a spike region of the stress profile, followed by a second treatment which includes, for example, a potassium and sodium mixed bath to maintain the spike and form a tail region of the stress profile. The glass-ceramic articles may thereby avoid developing a vitreous surface layer, which facilitates repeatable and reliable measurement of waveguide modes and determination of compressive stress in the surface (CS) and depth of the spike.

Abstract: A pre-fractured glass laminate that includes: a glass substrate comprising a thickness, a pair of opposed primary surfaces, a compressive stress region, a central tension (CT) region and a plurality of cracks; a second phase comprising a polymer or a cured resin within the plurality of cracks; a backing layer; and an interlayer disposed between one of the primary surfaces of the substrate and the backing layer. The compressive stress region extends from each of the primary surfaces to a first selected depth in the substrate. Further, the plurality of cracks is located in the CT region.

Abstract: The efficiency of ion exchange processes is increased by increasing the concentration of nitrite salts in the molten salt bath. The increase in nitrite salt concentration may be achieved by adding a nitrite salt to a molten nitrate salt bath, aging a molten nitrate salt bath, or a combination thereof. The glass-based articles produced using the modified baths exhibit reduced haze and increased flexural strength.

Abstract: The present invention relates to a glass composition that includes: 57 to 75 percent by weight of SiO2; 3 to 11 percent by weight of Al2O3; 6 to 11 percent by weight of Na2O; 16 to 21 percent by weight of CaO; 0.01 to 0.1 percent by weight of Li2O; and less than 0.05 percent by weight of K2O. Each percent by weight is based on total weight of the glass composition. Glass products are also provided that have a bulk glass composition as described above. The glass products, such as flat glass products and glass substrates, have a strain point of at least 590° C. and a thermal expansion of at least 7.4 ppm/° C. The present invention also relates to magnetic recording articles and photovoltaic cells that include a glass substrate that has a bulk glass composition as described above.

Abstract: Chemically toughened glass is provided that has a depth of compressive stress for potassium of at least 4 ?m and at most 8 ?m; a compressive stress at a depth of 30 ?m due to sodium exchange of at most 200 MPa and a minimum amount of at least 90 MPa where the thickness is 0.5 mm, at least 100 MPa where the thickness is 0.55 mm, at least 110 MPa in where the thickness is 0.6 mm, at least 120 MPa where the thickness is 0.7 mm, and at least 140 MPa where the thickness is 1 mm; a ratio of sodium exchange depth, in ?m, to the thickness, in mm, that is greater than 0.130; and a normalized integral of tensile stress that is a storable tensile stress of at least 20.6 MPa and at most 30 MPa.

Abstract: The invention relates to a glass sheet having a luminous transmission LTD4?87% and having a composition free of antimony and arsenic, comprising total iron (expressed in the form of Fe2O3) from 0.002-0.04% and erbium (expressed in the form of Er2O3) from 0.003-0.1%. The glass sheet composition further having a redox ratio ?32% and satisfying the formula 1.3*Fe2O3?Er2O3?21.87*Cr2O3?53.12*Co?2.6*Fe2O3. Such a glass sheet has a high luminous transmittance and has warm-toned to neutral colored edges and is particularly suitable due to its aesthetics as building glass or interior glass, as well as in furniture applications, as automotive glass, or as cover glass in electronic devices/displays.

Abstract: Coated glass-based articles and methods of manufacture disclosed. An article comprises a chemically strengthened glass-based core substrate having a first surface and a second surface, a chemically strengthened glass-based first cladding substrate having a third surface directly bonded to the first surface to provide a first core-cladding interface and a chemically strengthened glass-based second cladding substrate having a fourth surface directly bonded to the second surface to provide a second core-cladding interface, wherein the core substrate is bonded to the first cladding substrate and the second cladding substrate, and there is a coating on the first cladding substrate.

Abstract: A portable flexure fixture including a fixture housing, a translatable plug, a load ring, and a support ring. The fixture housing includes a first end opposite a second end, a plug receiving opening extending into the first end and a test opening extending into the second end. The support ring is disposed in the fixture housing. The translatable plug is insertable into the plug receiving opening of the fixture housing and is translatable in both a sample engaging direction and a sample releasing direction. Further, the load ring is coupled to the translatable plug and is positioned at a sample facing end of the translatable plug such that translation of the translatable plug in the sample engaging direction translates the load ring in the sample engaging direction and translation of the translatable plug in the sample releasing direction translates the load ring in the sample releasing direction.

Abstract: A magnetic-disk glass substrate contains an alkaline earth metal component as a glass composition and includes a pair of main surfaces, and an outer circumferential side edge surface that is a mirror surface. The outer circumferential side edge surface includes a surface having a roughness percentage of 40% or more when a bearing ratio of a roughness cross-sectional area is 50% in a bearing ratio curve of roughness cross-sectional areas obtained when a surface roughness of the outer circumferential side edge surface obtained after the outer circumferential side edge surface is etched by 2.5 ?m is measured.

Abstract: The present invention relates to a method for producing a chemically strengthened glass, the method including, performing a chemical strengthening treatment including the following steps (1) to (3) to a glass having a specific composition, (1) a step of bringing the glass into contact with an inorganic salt composition including 70 mass % or more of potassium nitrate to perform ion exchange; (2) a step of bringing the glass having been ion-exchanged in step (1) into contact with an inorganic salt composition including 50 mass % or more of sodium nitrate to perform ion exchange; and (3) a step of bringing the glass having been ion-exchanged in step (2) into contact with an inorganic salt composition including 70 mass % or more of potassium nitrate to perform ion exchange.

Abstract: According to one embodiment, a glass composition may include from 65 mol. % to about 75 mol. % SiO2; from about 6 mol. % to about 12.5 mol. % Al2O3; from about 5 mol. % to about 12 mol. % alkali oxide; and from about 2 mol. % to about 7 mol. % CaO. The glass composition may be free from boron and BaO. The glass composition may be susceptible to strengthening by ion-exchange.

Abstract: According to one embodiment, a glass article may include SiO2, Al2O3, Li2O and Na2O. The glass article may have a softening point less than or equal to about 810° C. The glass article may also have a high temperature CTE less than or equal to about 27×10?6/° C. The glass article may also be ion exchangeable such that the glass has a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 25 ?m after ion exchange in a salt bath comprising KNO3 at a temperature in a range from about 390° C. to about 450° C. for less than or equal to approximately 15 hours.

Abstract: A glass article including, on an oxide basis, from 60 mol % to 74 mol % SiO2, from 7 mol % to 18 mol % Al2O3, from 3 mol % to 16 mol % B2O3, from 0 mol % to 6 mol % Na2O, from 0 mol % to 5 mol % P2O5, from 5 mol % to 11 mol % Li2O, less than or equal to 0.2 mol % SnO2, and from 0.5 mol % to 6.5 mol % divalent cation oxides. The glass article has a molar ratio of Al2O3:(R2O+RO) greater than or equal to 0.9, where R2O is a sum of alkali metal oxides in mol % and RO is a sum of divalent cation oxides in mol %.

Abstract: A touch sensor includes a glass substrate having a touch surface and a first touch electrode formed of a fine metal wire formed on a surface of the glass substrate opposite to the touch surface, the glass substrate contains an Si atom, an Al atom, and a K atom, a content of the Si atom is 25.0% to 35.0% by mass with respect to the total mass of the glass substrate, a content of the Al atom is 5.0% to 16.0% by mass with respect to the total mass of the glass substrate, and a content of the K atom is 3.0% to 10.0% by mass with respect to the total mass of the glass substrate.

Abstract: Embodiments of glass articles including a compressive stress (CS) region and a central tension (CT) region, wherein a portion of the CS region extends from the first major surface to a depth of compression (DOC), wherein, when the glass article is in a substantially flat configuration, the CT region has a maximum value (CTflat) that is about 60 MPa or less, and wherein, when the glass article is in a cold bent configuration, CT region comprises a maximum value (CTbent), wherein CTbent/CTflat<1.4. Embodiments of automotive interior systems including such glass articles are provided, along with methods for forming a glass article and for forming an automotive interior system are also disclosed.

Abstract: A glass article including, on an oxide basis, from 60 mol % to 74 mol % SiO2, from 7 mol % to 18 mol % Al2O3, from 3 mol % to 16 mol % B2O3, from 0 mol % to 6 mol % Na2O, from 0 mol % to 5 mol % P2O5, from 5 mol % to 11 mol % Li2O, less than or equal to 0.2 mol % SnO2, and from 0.5 mol % to 6.5 mol % divalent cation oxides. The glass article has a molar ratio of Al2O3:(R2O+RO) greater than or equal to 0.9, where R2O is a sum of alkali metal oxides in mol % and RO is a sum of divalent cation oxides in mol %.

Abstract: Embodiments of glass articles comprising an anneal point (° C.) and a softening point (° C.), and the relationship of (anneal point+softening point)/2 in a range from about 625° C. to about 725° C. are disclosed. In one or more embodiments, the glass articles include a glass composition including SiO2 in an amount in a range from about 63 mol % to about 75 mol %; Al2O3 in an amount in a range from about 7 mol % to about 13 mol %; R2O in an amount from about 13 mol % to about 24 mol %; P2O5 in an amount in a range from about 0 mol % to about 3 mol %, and one or both of MgO and ZnO. Laminates including such glass articles, and methods for making such laminates are also disclosed.

Abstract: A chemically strengthened glass has a compressive stress layer formed in a glass surface layer by ion exchange. The compressive stress layer includes at least two types of stress patterns of a stress pattern A close to a glass surface and a stress pattern B on an inner side of the glass. In the stress pattern A, compressive stress increases as going inward from the glass surface. In the stress pattern B, compressive stress decreases as going inward from the glass surface. Depth of compressive stress layer in the stress pattern B is 90 ?m or more from the glass surface. Compressive stress ? MPa of the glass surface in the stress pattern A and compressive stress ? MPa at a point where the stress pattern A and the stress pattern B cross each other satisfy a relation of ?>?.

Abstract: A magnetic-disk glass substrate containing an alkali metal component as a glass composition includes a pair of main surfaces and an outer circumferential side edge surface that is a mirror surface. The outer circumferential side edge surface includes a surface with a roughness percentage that is 40% or more when a bearing ratio of a roughness cross-sectional area is 50%, in a bearing ratio curve of roughness cross-sectional areas obtained when a surface roughness of the outer circumferential side edge surface obtained by etching the outer circumferential side edge surface by 2.5 ?m is measured.

Abstract: The invention relates to a process for permanently electrostatically doping a layer of a conductive or non-conductive material that is deposited on a solid substrate, to the doped material obtained according to this process, and to the use of such a material.

Abstract: Glass-based articles article are described and have a first surface and a second surface opposing the first surface defining a thickness (t) (mm); and a compressive stress (CS) layer containing ion-exchanged potassium and ion-exchanged silver or ion-exchanged potassium and ion-exchanged copper, the CS layer extending from the first surface to a depth of compress (DOC), wherein the DOC is in a range of 0.1·t and 0.3·t, the CS at the first surface in a range of 300 MPa and 1500 MPa and defining a compressive stress profile including a spike region, a tail region and a knee region between the spike region and the tail region, wherein all points of the stress profile in the spike region comprise a tangent having a value that is in a range of ?15 MPa/micrometer and ?200 MPa/micrometer and all points in the tail region comprise a tangent having a value that is in a range of ?0.01 MPa/micrometer and ?3 MPa/micrometer.

Abstract: A glass laminate for an architectural element has a glass substrate coupled to the architectural element and defines a primary surface facing away from the architectural element. A phase-separable glass cladding is coupled to the primary surface. The cladding has an interconnected matrix with a first phase composition and a second phase that has a second phase composition different than the first phase composition. The second phase is distributed throughout the interconnected matrix. A copper phase is distributed within the interconnected matrix. The glass cladding has an antimicrobial log kill rate greater than about 4 as measured by an EPA Copper Test Protocol.

Abstract: Disclosed are device display screen protectors comprising a first strengthened substrate sized to cover a display screen of an electronic device, the first strengthened substrate having a central tension value in the range greater than 0 MPa and less than 20 MPa, a surface having a Knoop lateral cracking scratch threshold of at least 3 N.

Abstract: Glass-based articles comprise: a glass-based substrate having opposing first and second surfaces defining a substrate thickness (t); a stress profile comprising: a compressive stress region extending from the first surface to a depth of compression (DOC), the DOC located at 0.04•t or deeper; and a central tension region. An alkali metal oxide is present in the central tension region. A first metal oxide whose metal has the same or smaller atomic radius as the metal of the alkali metal oxide, and a second metal oxide whose metal has a larger atomic radius than the metal of the alkali metal oxide are both present in independent concentrations that vary within at least a portion of the compressive stress region.

Abstract: Provided herein is a glass composition comprising: about 72 mol % to about 77 mol % SiO2; about 8 mol % to about 12 mol % Al2O3; about 10 mol % to about 14 mol % of one or more alkali oxide R2O, wherein R2O is Li2O, Na2O, K2O, Rb2O, or Cs2O; one or more divalent oxide RO, wherein RO is MgO, CaO, SrO, BaO, or ZnO; and P2O5, wherein the ratio of mol % RO/(mol % R2O+mol % RO) is at least about 0.2. The glass composition has one or more of the following characteristics: (i) a low temperature (form 25° C. to 300° C.) coefficient thermal expansion (LTCTE) of less than 7.5 ppm/° C.; (ii) high temperature coefficient thermal expansion (HTCTE) of less than 18 ppm/° C.; (iii) liquidus viscosity of at least 200,000 poise; (iv) glass temperature of at least 1100° C. at 200,000 poise or at least 1200° C. at 35,000 poise; and (v) a fictive temperature Tf less than about 795° C.

Abstract: A laminated glazing unit includes one to ten first glass sheets each of thickness included between 1.5 and 22 mm, if needs be adhesively bonded to one another by one or more first adhesive interlayers, and a second glass sheet forming one of the two faces of the laminated glazing unit, of thickness included between 0.5 and 1.5 mm, and adhesively bonded to the first glass sheet(s) by a second adhesive interlayer, the second glass sheet being made of aluminosilicate or soda-lime glass that is chemically toughened, having a surface stress comprised between 300 and 1000 and between 200 and 500 MPa, respectively, and a depth under compression between 20 and 100 ?m.

Abstract: A glass-based article including a first surface and a second surface opposing the first surface defining a thickness (t) of about 3 millimeters or less (e.g., about 1 millimeter or less), and a stress profile, wherein all points of the stress profile between a thickness range from about 0·t up to 0.3·t and from greater than about 0.7·t to t, comprise a tangent with a slope having an absolute value greater than about 0.1 MPa/micrometer. In some embodiments, the glass-based article includes a non-zero metal oxide concentration that varies along at least a portion of the thickness (e.g., 0·t to about 0.3·t) and a maximum central tension of less than about 71.5/?(t) (MPa). In some embodiments, the concentration of metal oxide or alkali metal oxide decreases from the first surface to a point between the first surface and the second surface and increases from the point to the second surface. The concentration of the metal oxide may be about 0.05 mol % or greater or about 0.

Abstract: The present invention relates to glass with a single reinforced layer, comprising a glass body and the single reinforced layer formed in a surface of the glass body. The compressive stress of the single reinforced layer trends to decrease non-linearly from the surface of the glass body to the interior of the glass body. The compressive stress curve of the single reinforced layer has an inflection point. The gradient of a first curve section in front of the inflection point is greater than the gradient of a second curve section behind the inflection point. The overall refractive index of the single reinforced layer trends to decrease non-linearly from the surface of the glass body to the interior of the glass body. The refractive index curve of the single reinforced layer has at least two inflection points. Furthermore, a method for preparing the glass with a single reinforced layer is provided.

Abstract: Methods of characterizing ion-exchanged chemically strengthened glass containing lithium are disclosed. The methods allow for performing quality control of the stress profile in chemically strengthened Li-containing glasses having a surface stress spike produced in a potassium-containing salt, especially in a salt having both potassium and sodium. The method allows the measurement of the surface compression and the depth of the spike, and its contribution to the center tension, as well as the compression at the bottom of the spike, and the total center tension and calculation of the stress at the knee where the spike and the deep region of the stress profile intersect. The measurements are for a commercially important profile that is near-parabolic in shape in most of the interior of the substrate apart from the spike.

Abstract: A glass article having an asymmetric stress profile exhibiting a high degree of asymmetry and a low degree or no warp. The glass article has a stress profile with a high Asymmetry Figure of Merit and a high Warpage Figure of Merit.

Abstract: The invention relates to a method to produce a medical form body of lithium silicate glass ceramic. To increase its strength it is proposed that a surface compressive stress is created in a form body of lithium silicate glass, or containing lithium silicate glass, through the replacement of lithium ions by alkali metal ions of greater diameter. For this purpose the form body is covered with a paste that contains alkali metal.

Abstract: Chemically temperable glass sheet The invention relates to a glass sheet having a boron-, strontium- and lithium-free glass composition comprising the following in weight percentage, expressed with respect to the total weight of glass: 65?SiO2?78% 8?Na2O?15% 1?K2O<6% 1?Al2O3<3% 2?CaO<10% 0?MgO?6%; as well as a total iron (expressed in the form of Fe2O3) in a content ranging from 0.002 to 0.02% by weight and a K2O/(K2O+Na2O) ratio which is ranging from 0.1 and 0.7. The invention corresponds to an easy chemically-temperable soda-lime-silica type glass composition, which is more suited for use in electronic devices applications.

Abstract: A glass-ceramic composition is disclosed herein including: from about 60 mol. % to less than 72.0 mol. % SiO2; from about 10 mol. % to about 17 mol. % Al2O3; from about 3 mol. % to about 15 mol. % Na2O; from about 1 mol. % to about 8 mol. % Li2O; and from about 3 mol. % to about 7 mol. % TiO2. The glass-ceramic composition can be used to form one, two, or more, cladding layers of a laminated glass article, wherein the layer(s) of glass-ceramics material can be cerammed to form one or more glass layers.

Abstract: A strengthened glass article (100), such as a substrate for a p-Si based transistors, includes first and second glass cladding layers (104, 106) and a glass core layer (102) disposed therebetween. A coefficient of thermal expansion [CTE] of each cladding layer (104, 106), which can be made of the same glass, is at least 1×10?7° C.?1 less than that of the core layer (102). Each of the core and cladding layers has a strain point less than 700° C. A compaction of the glass article (100) is at most about 20 ppm [see FIG. 1]. A method includes forming a glass article and/or heating a glass article to a first temperature of at least about 400° C. The glass article has a glass core layer (102) and a glass cladding layer (104, 106) adjacent to the core layer. The glass article is maintained at a temperature within a range of from 400° C. to 600° C. for a holding period from 30 to 90 minutes and subsequently cooled to a temperature of at most 50° C. over a cooling period from 30 seconds to 5 minutes.

Abstract: Glass-ceramics and precursor glasses that are crystallizable to glass-ceramics are disclosed. The glass-ceramics of one or more embodiments include rutile, anatase, armalcolite or a combination thereof as the predominant crystalline phase. Such glasses and glass-ceramics may include compositions of, in mole %: SiO2 in the range from about 45 to about 75; Al2O3 in the range from about 4 to about 25; P2O5 in the range from about 0 to about 10; MgO in the range from about 0 to about 8; R2O in the range from about 0 to about 33; ZnO in the range from about 0 to about 8; ZrO2 in the range from about 0 to about 4; B2O3 in the range from about 0 to about 12, and one or more nucleating agents in the range from about 0.5 to about 12. In some glass-ceramic articles, the total crystalline phase includes up to 20% by weight of the glass-ceramic article.

Abstract: A glass having from greater than or equal to about 0.1 mol. % to less than or equal to about 20 mol. % Ho2O3, and one or more chromophores selected from V, Cr, Mn, Fe, Co, Ni, Se, Pr, Nd, Er, Yb, and combinations thereof. The amount of Ho2O3 (mol. %) is greater than or equal to 0.7 (CeO2 (mol. %)+Pr2O3 (mol. %)+Er2O3 (mol. %)). The glass can include one or more fluorescent ions selected from Cu, Sn, Ce, Eu, Tb, Tm, and combinations thereof in addition to, or in place of the chromophores. The glass can also include multiple fluorescent ions.

Abstract: A volume-colored monolithic glass ceramic cooking plate is provided. The plate includes a first zone in which the coloration of the glass ceramic differs from that of a second, adjacent zone, so that an absorption coefficient of the first zone is lower than the absorption coefficient of the second, adjacent zone and so that integral light transmission in the visible spectral range is greater in the first zone than the integral light transmission of the second, adjacent zone. The light scattering in the glass ceramic of the first zone differs from light scattering in the glass ceramic of the second zone by not more than 20 percentage points, preferably by not more than 5 percentage points.

Abstract: Ion exchangeable alkali aluminosilicate glasses and glass articles having softening points and high temperature coefficients of thermal expansion that permit the glass to be formed into three-dimensional shapes by the vacuum sagging process are provided. These glasses contain significant amounts of at least one of MgO and ZnO and comprise B2O3 and less than 1 mol % Li2O.

Abstract: The glass sheet of the present invention is a glass sheet with a thickness of 1.6 mm or less produced by a float process in which a molten glass material is formed into a sheet on a molten metal. When one surface of the glass sheet kept in contact with the molten metal during the formation of the molten glass material into the glass sheet is defined as a first surface and the other surface of the glass sheet opposite to the first surface is defined as a second surface, at least the first surface has been subjected to a treatment for forming a densified dealkalized layer therein. An etching rate ER1 (nm/min) of the first surface and an etching rate ER2 (nm/min) of the second surface satisfy a relation of ER2/ER1?0.8 when the first surface and the second surface are etched using 0.1 mass % hydrofluoric acid at 50° C. as an etching liquid.

Abstract: Controlling foam in apparatus downstream of a melter by adjustment of alkali oxide content in the melter. One method includes feeding a feedstock into a submerged combustion melter (SCM) apparatus having an internal space containing a flowing or non-flowing molten mass of foamed glass comprising molten glass and bubbles entrained therein, the molten mass having glass foam comprising glass foam bubbles on at least a portion of a top surface of the molten mass. The molten mass from the SCM is routed to a downstream apparatus, stability of the glass foam in the downstream apparatus is observed, and alkali oxide percentage fed to the SCM apparatus is adjusted based on the observation to positively or negatively affect the foam stability. Systems for carrying out the methods, and the products of the methods are also considered novel and inventive.

Abstract: Delamination resistant glass containers with heat-tolerant coatings are disclosed. In one embodiment, a glass container may include a glass body having an interior surface, an exterior surface and a wall thickness extending from the exterior surface to the interior surface. At least the interior surface of the glass body is delamination resistant. The glass container may further include a heat-tolerant coating positioned on at least a portion of the exterior surface of the glass body. The heat-tolerant coating may be thermally stable at temperatures greater than or equal to 260° C. for 30 minutes.

Abstract: Chemically strengthened glass and a method for making utilizing differential chemistry are provided. The method includes providing a substrate having a glass chemical structure. Host alkali ions are situated in the chemical structure. The substrate has a treatment-rich volume and a treatment-poor volume located as opposed to each other in the substrate. The method also includes providing an exchange medium characterized by including a composition associated with an ion exchange rate of invading alkali ions having an average ionic radius that is larger than an average ionic radius of the host alkali ions. The method also includes providing a modified exchange medium including a modified composition associated with a modified ion exchange rate of the invading alkali ions. The method also includes applying the exchange mediums and conducting ion exchange to produce the strengthened substrate.

Abstract: A method of strengthening an alkali aluminoborosilicate glass. A compressive layer extending from a surface of the glass to a depth of layer is formed by exchanging larger metal cations for smaller metal cations present in the glass. In a second step, metal cations in the glass are exchanged for larger metal cations to a second depth in the glass that is less than the depth of layer and increase the compressive stress of the compressive layer. Formation of the compressive layer and replacement of cations with larger cations can be achieved by a two-step ion exchange process. An alkali aluminoborosilicate glass having a compressive layer and a crack indentation threshold of at least 3000 gf is also provided.

Abstract: An object is to provide a glass for chemical toughening treatment satisfying low brittleness, low melt viscosity and high chemical toughening characteristics, and a chemically toughened glass using the same. Provided is a glass for chemical toughening treatment containing, in mass % in terms of oxides, SiO2 63 to 76, B2O3 0 to 2, Al2O3 2 to 10, MgO 2 to 12, CaO 0.1 to 8, Na2O 14.5 to 19, K2O 0 to 3, and Fe2O3 0 to 0.5, satisfying a total content of alkali earth metal oxides (RO) being from 5 to 15, satisfying 15×MgO/RO?RO?3, and having a temperature T2 at which a glass viscosity reaches 102 dPa·s being 1,600° C. or lower.