Described herein are various antimicrobial glass articles that have improved strength and resistance to discoloration. The improved antimicrobial glass articles described herein generally include a glass substrate with a compressive stress layer and an antimicrobial silver-containing region that each extend inward from a surface of the glass substrate to a specific depth. In some embodiments, the compressive stress layer has a compressive stress at the surface of about 500 MPa or greater and the compressive stress decreases monotonically from the surface into the depth of the glass substrate. Methods of making and using the glass articles are also described and include forming a compressive stress layer and forming an antimicrobial silver-containing region by preferentially exchanging a plurality of silver cations in a silver-containing medium for a specific plurality of first cations ions in the glass substrate.

Embodiments disclosed therein generally pertain to selectively strengthening glass. More particularly, techniques are described for selectively strengthening cover glass, which tends to be thin, for electronic devices, namely, portable electronic devices.

A glass article includes P, Al, an alkali earth metal, F and O, wherein the content of P and O is greater at the surface side of the glass article than the inner side thereof and the content of the alkali earth metal and F is less at the surface side of the glass article than the inner side thereof.

A method for forming a laminated glass article may include flowing a molten first glass composition having a first R.sub.2O concentration and a first fining agent with a first fining agent concentration. The method may also include flowing a molten second glass composition having a second R.sub.2O concentration less than the first R.sub.2O concentration of the first glass composition and a second fining agent with a second fining agent concentration that is greater than or equal to the first fining agent concentration of the first glass composition. The molten first glass composition may be contacted with the molten second glass composition to form an interface between the molten first glass composition and the molten second glass composition.

Frangible glass articles having a fracture behavior that resists ejection of glass particles upon fracture. In some embodiments, the frangible glass articles can have a first surface region with a first elastic compressive stress energy per unit area of glass (W.sub.el.sup.comp1), a second surface region with a second elastic compressive stress energy per unit area of glass (W.sub.el.sup.comp2), and a central region with an elastic tensile stress energy per unit area of glass (W.sub.T), where (W.sub.el.sup.comp1+W.sub.el.sup.comp2)−W.sub.T≤25 J/m.sup.2. In some embodiments, the frangible glass articles can have a total load ratio (W.sub.i/G.sub.D) less than 6.5 and a total elastic compressive stress energy per unit area of glass (W.sub.C) less than 60% of a total load (W.sub.i), where: W.sub.C=W.sub.el.sup.comp1+W.sub.el.sup.comp2, W.sub.i=W.sub.C+W.sub.T, G.sub.D=4G.sub.1C, and

[00001]$G_{1C}=\frac{K_{1C}^2\left(1-v^2\right)}{E}.$

In some embodiments, the frangible glass articles can have a differential load ratio (W.sub.d/G.sub.IC) less than

[00002]$72e^{\left(-12\frac{d1}{t}\right)}.$

An object of the present invention is to provide a chemically strengthened glass plate that is chemically strengthened and thereby increased in strength in its entirety, a portable information terminal using the chemically strengthened glass plate, and a manufacturing method of the a chemically strengthened glass plate. The chemically strengthened glass plate and the manufacturing method thereof according to the present invention is suitable for use in fields of portable information terminals, substrates, etc. in which glass plates having high resistance to impact are required.

A strengthened glass has a mirror constant A of 1.97 MPa.Math.m.sup.0.5 or less, a surface compressive stress (CS) of 10 MPa or more. A product (t×CS) of a sheet thickness t (unit: mm) and the CS (unit: MPa) is less than 230. The strengthened glass may have a fictive temperature at a central portion in a sheet thickness t direction of not lower than a glass transition temperature Tg and Tg+100° C. or lower.

A glass-ceramic article includes 50 mol. % to 80 mol. % SiO.sub.2; 10 mol. % to 25 mol. % Al.sub.2O.sub.3; 5 mol. % to 20 mol. % MgO; 0 mol. % to 10 mol. % Li.sub.2O; and 1 mol. % to 3 mol. % of a nucleating agent. The nucleating agent is selected from the group consisting of ZrO.sub.2, TiO.sub.2, SnO.sub.2, HfO.sub.2, Ta.sub.2O.sub.5, Nb.sub.2O.sub.5, Y.sub.2O.sub.3, and combinations thereof. The nucleating agent may comprise greater than or equal to 50% ZrO.sub.2 and less than 50% of at least one compound selected from the group consisting of TiO.sub.2, SnO.sub.2, HfO.sub.2, Ta.sub.2O.sub.5, Nb.sub.2O.sub.5, Y.sub.2O.sub.3, and combinations thereof. The glass-ceramic article may have a molar ratio of MgO to Li.sub.2O of greater than or equal to 1:1. The glass-ceramic article may satisfy the relationship 0.85≤(MgO (mol %)+Li.sub.2O (mol %))/Al.sub.2O.sub.3 (mol %)≤1.2. The glass-ceramic article may comprise a crystalline phase comprising hexagonal stuffed β-quartz and glass.

An ion exchange tank is provided. The ion exchange tank includes a processing chamber and an additive chamber separated by a weir system, the weir system having a flow channel fluidly connecting the processing chamber to the additive chamber, wherein the flow is divided from the additive chamber by a first partition and divided from the processing chamber by a second partition, wherein the additive chamber comprises a solids-absorbing material disposed therein.

A glass sheet accommodating jig (1) accommodates a plurality of glass sheets (2) under a state in which the plurality of glass sheets (2) are arranged upright at intervals in a thickness direction in order to immerse the plurality of glass sheets (2) in a chemical tempering liquid. The glass sheet accommodating jig (1) includes a string-shaped body (7) being formed of at least one metal fiber. An end portion (2a) of the glass sheet (2) is supported by a V-shaped recess (7c) formed by intersection of a pair of string-shaped bodies (7a and 7b).