Embodiments of the present invention pertain to antimicrobial glass compositions, glasses, and articles. The articles include a glass, which may include a glass phase and a cuprite phase. In other embodiments, the glasses include a plurality of Cu.sup.1+ ions, a degradable phase including B.sub.2O.sub.3, P.sub.2O.sub.5 and K.sub.2O, and a durable phase including SiO.sub.2. Other embodiments include glasses having a plurality of Cu.sup.1+ ions disposed on the surface of the glass and in the glass network and/or the glass matrix. The article may also include a polymer. The glasses and articles disclosed herein exhibit a 2 log reduction or greater in a concentration of at least one of Staphylococcus aureus, Enterobacter aerogenes, Pseudomonas aeruginosa bacteria, Methicillin Resistant Staphylococcus aureus, and E. coli, under the EPA Test Method for Efficacy of Copper Alloy as a Sanitizer testing condition and under Modified JIS Z 2801 for Bacteria testing conditions.

A ceramic composition includes an antimicrobial glass composition that includes components harmless to the human body and maintains an antimicrobial function semi-permanently. Specifically, the ceramic composition includes a novel antimicrobial glass composition that includes a glass former SiO.sub.2 as a main component, and ZnO and SnO as antimicrobial components.

A ceramic composition includes an antimicrobial glass composition that includes components harmless to the human body and maintains an antimicrobial function semi-permanently. Specifically, the ceramic composition includes a novel antimicrobial glass composition that includes a glass former SiO.sub.2 as a main component, and ZnO and SnO as antimicrobial components.

Disclosed herein are embodiments of a borosilicate glass composition comprising B.sub.2O.sub.3 in an amount greater than or equal to 11 mol % and less than or equal to 16 mol %; Al.sub.2O.sub.3 in an amount greater than or equal to 2 mol % and less than or equal to 5 mol %; one or more alkali metal oxides; one or more alkaline earth metal oxides; a total amount of Na.sub.2O, K.sub.2O, MgO, and CaO that is greater than or equal to 7.0 mol %°. Amounts of SiO.sub.2, B.sub.2O.sub.3, the one or more alkali metal oxides, Al.sub.2O.sub.3, and the one or more alkaline earth metal oxides, satisfy: (R.sub.2O+R′O)≥Al.sub.2O.sub.3, and 0.80<(1−[(2R.sub.2O+2R′O)/(SiO.sub.2+2Al.sub.2O.sub.3+2B.sub.2O.sub.3)])<0.93, where R.sub.2O and R′O are sums sum of the concentrations of the one or more alkali metal oxides and the one or more alkaline earth metal oxides, respectively.

Disclosed herein are embodiments of a borosilicate glass composition comprising B.sub.2O.sub.3 in an amount greater than or equal to 11 mol % and less than or equal to 16 mol %; Al.sub.2O.sub.3 in an amount greater than or equal to 2 mol % and less than or equal to 5 mol %; one or more alkali metal oxides; one or more alkaline earth metal oxides; a total amount of Na.sub.2O, K.sub.2O, MgO, and CaO that is greater than or equal to 7.0 mol %°. Amounts of SiO.sub.2, B.sub.2O.sub.3, the one or more alkali metal oxides, Al.sub.2O.sub.3, and the one or more alkaline earth metal oxides, satisfy: (R.sub.2O+R′O)≥Al.sub.2O.sub.3, and 0.80<(1−[(2R.sub.2O+2R′O)/(SiO.sub.2+2Al.sub.2O.sub.3+2B.sub.2O.sub.3)])<0.93, where R.sub.2O and R′O are sums sum of the concentrations of the one or more alkali metal oxides and the one or more alkaline earth metal oxides, respectively.

A method for preparing an optically transparent, superomniphobic coating on a substrate, such as an optical substrate, is disclosed. The method includes providing a glass layer disposed on a substrate, the glass layer having a first side adjacent the substrate and an opposed second side, the glass layer comprising 45-85 wt. % silicon oxide in a first glass phase and 10-40 wt. % boron oxide in a second glass phase, such that a glass layer has a composition in a spinodal decomposition region. The method further includes heating the second side of the glass layer to form a phase-separated portion of the layer, the phase-separated portion comprising an interpenetrating network of silicon oxide domains and boron oxide domains, and removing at least a portion of the boron oxide domains from the phase-separated portion to provide a graded layer disposed on the substrate. The graded layer has a first side disposed adjacent the substrate, the first side comprising 45-85 wt. % silicon oxide and 10-40 wt. % boron oxide, and opposite the first side, a porous second side comprising at least 45 wt. % silicon oxide and no more than 5 wt. % boron oxide.

Provided is a method for producing a porous glass member whereby excellent productivity can be achieved because of a high etching rate during acidic treatment and a porous glass member having excellent alkali resistance can be obtained. A method for producing a porous glass member includes the steps of: subjecting a glass base material containing, in terms of % by mole, 40 to 80% SiO.sub.2, over 0 to 40% B.sub.2O.sub.3, 0 to 20% Li.sub.2O, 0 to 20% Na.sub.aO, 0 to 20% K.sub.2O, over 0 to 10% TiO.sub.2, over 0 to 20% ZrO.sub.2, 0 to 10% Al.sub.2O.sub.3, and 0 to 20% RO (where R represents at least one selected from among Mg, Ca, Sr, and Ba) and having a molar ratio of Li.sub.2O/Na.sub.2O of 0 to 0.16 to thermal treatment to separate the glass base material into two phases; and removing one of the two phases with an acid.

Provided is a method for producing a porous glass member whereby cracking during production is less likely to occur and a porous glass member having excellent alkali resistance can be produced. A method for producing a porous glass member includes the steps of: subjecting a glass base material containing, in terms of % by mole, 40 to 80% SiO.sub.2, over 0 to 40% B.sub.2O.sub.3, 0 to 20% Li.sub.2O, 0 to 20% Na.sub.2O, 0 to 20% K.sub.2O, over 0 to 2% P.sub.2O.sub.5, over 0 to 20% ZrO.sub.2, 0 to 10% Al.sub.2O.sub.3, and 0 to 20% RO (where R represents at least one selected from among Mg, Ca, Sr, and Ba) to thermal treatment to separate the glass base material into two phases; and removing one of the two phases with an acid.

Provided is a method for producing a porous glass member whereby cracking during production is less likely to occur and a porous glass member having excellent alkali resistance can be produced. A method for producing a porous glass member includes the steps of: subjecting a glass base material containing, in terms of % by mole, 40 to 80% SiO.sub.2, over 0 to 40% B.sub.2O.sub.3, 0 to 20% Li.sub.2O, 0 to 20% Na.sub.2O, 0 to 20% K.sub.2O, over 0 to 2% P.sub.2O.sub.5, over 0 to 20% ZrO.sub.2, 0 to 10% Al.sub.2O.sub.3, and 0 to 20% RO (where R represents at least one selected from among Mg, Ca, Sr, and Ba) to thermal treatment to separate the glass base material into two phases; and removing one of the two phases with an acid.

Mineral wool fibers having a mineral wool fiber composition are manufactured by introducing batch materials into a melter, melting the mineral batch materials in the melter to provide a melt and fiberizing the melt to form the mineral wool fibers. The batch materials comprise i) fibers having a first batch material composition which is different from the mineral wool fiber composition and consisting of scrap fibers which have broken at a bushing producing continuous fibers; and ii) one of more additional mineral batch materials.