A vitrifiable feed material for producing flint glass by way of a process that uses submerged combustion melting includes a base glass portion, an oxidizing agent, and a decolorant. The base glass portion includes an SiO.sub.2 contributor, an Na.sub.2O contributor, and a CaO contributor to provide SiO.sub.2, Na.sub.2O, and CaO, respectively, to a glass melt when melted therein. The oxidizing agent may be a sulfate compound in an amount ranging from 0.20 wt % to 0.50 wt % as expressed as SO.sub.3 based on the total weight of the vitrifiable feed material, and the decolorant may be selenium in an amount ranging from 0.008 wt % to 0.016 wt % or manganese oxide in an amount ranging from 0.1 wt % to 0.2 wt % based on the total weight of the vitrifiable feed material.

The disclosure relates to bioactive glasses for use in biomedical applications. In particular, the glasses described herein are phosphate glasses that show fast filling rates of dentin tubules and have advantageous release rates of metal ions, which provide advantages in antibacterial applications and wound healing.

Methods and a glass manufacturing system are described herein that impact compaction in a glass sheet. For instance, a method is described herein for impacting compaction in a glass sheet made by a glass manufacturing system. In addition, a glass manufacturing system is described herein which manufactures a glass sheet that meets a compaction target. Plus, a method is described herein for maintaining an uniform compaction between glass sheets made by different glass manufacturing systems.

A method of recycling glass fiber-reinforced polymer composite materials that can provide improved quality recycled glass fiber is described. More particularly, the method comprises pyrolysis of glass fiber-reinforced polymer composite scrap and/or end-of-life material and the subsequent immersion of the pyrolyzed glass fibers in a molten salt bath, e.g., comprising molten potassium nitrate. Immersion in the molten salt bath can eliminate char from the pyrolyzed fibers, as well as removing residual inorganic materials. In addition, immersion in the molten salt bath can strengthen the glass fiber, which can result in the recovery or avoidance of tensile strength losses normally incurred through traditional char removal processes.

A sub-assembly includes a glass substrate, a plurality of electronic devices, and a passivation layer. The glass substrate includes a first surface, a second surface opposite to the first surface, and a third surface extending between the first surface and the second surface. The glass substrate includes a plurality of laser damaged regions extending from the first surface to the second surface. The plurality of electronic devices are on the first surface of the glass substrate. The passivation layer is on the plurality of electronic devices and the third surface of the glass substrate. The passivation layer includes an opening to each laser damaged region of the plurality of laser damaged regions.

A glass article includes: from 60 mol % to 80 mol % SiO.sub.2; from 5 mol % a to 25 mol % Al.sub.2O.sub.3; from 0.25 mol % to 10 mol % MgO; from 0.25 mol % to 10 mol % Na.sub.2O; from 0 mol % to 2 mol % Li.sub.2O; from 0 mol % to 9 mol % La.sub.2O.sub.3; and from 0 mol % to 9 mol % Y.sub.2O.sub.3. La.sub.2O.sub.3+Y.sub.2O.sub.3 is from 2 mol % to 9 mol %. (La.sub.2O.sub.3+Y.sub.2O.sub.3)/(R.sub.2O+RO) is from 0.1 to 2, R.sub.2O being the sum of Na.sub.2O, Li.sub.2O, and K.sub.2O, and RO being the sum of MgO, CaO, SrO, and BaO.

The invention discloses porous, bioactive glass and glass ceramic morsels or pellets to be used as tissue graft substitute materials and processes for obtaining the same wherein the bioactive glass and glass ceramic morsels or pellets are made up of natural agents like phosphate, calcium, sodium and other elements which are not alien to the human or animal body. The said preparation process encompasses various steps like quenching sintering, foaming, and sol-gel casting which render the glass morsels or pellets unique bioactivity and enhanced porosity which may facilitate tissue repair and augmentation during tissue graft replacement.

A composition comprising glass containing both trivalent cerium oxide and tetravalent cerium oxide states nano particles. A soluble sodium borate glass comprising cerium oxide that is stable against crystallizations, the cerium oxide comprising both trivalent Ce.sup.3+ (Ce.sub.2O.sub.3) and tetravalent Ce.sup.4+ (CeO.sub.2) states, wherein the cerium oxide nano particles are configured to be released when the glass is dissolved.

An alkali free glass has an average coefficient of thermal expansion at 50 to 350° C. of 30×10.sup.−7 to 43×10.sup.−7/° C., a Young's modulus of 88 GPa or more, a strain point of 650 to 725° C., a temperature T.sub.4 at which a viscosity reaches 10.sup.4 dPa.Math.s of 1,290° C. or lower, a glass surface devitrification temperature (T.sub.c) of T.sub.4+20° C. or lower, and a temperature T.sub.2 at which the viscosity reaches 10.sup.2 dPa.Math.s of 1,680° C. or lower. The alkali free glass contains, as represented by mol % based on oxides, 62 to 67% of SiO.sub.2, 12.5 to 16.5% of Al.sub.2O.sub.3, 0 to 3% of B.sub.2O.sub.3, 8 to 13% of MgO, 6 to 12% of CaO, 0.5 to 4% of SrO, and 0 to 0.5% of BaO. MgO+CaO+SrO+BaO is 18 to 22%, and MgO/CaO is 0.8 to 1.33.

An opaque gahnite-spinel glass ceramic is provided. The glass ceramic includes a first crystal phase including (Mg.sub.xZn.sub.1-x)Al.sub.2O.sub.4 where x is less than 1 and a second crystal phase includes at least one of tetragonal ZrO.sub.2, MgTa.sub.2O.sub.6, mullite, and cordierite. The glass ceramic has a Young's modulus greater than or equal to 90 GPa, and has a hardness greater than or equal to 7.5 GPa. The glass ceramic may be ion exchanged. Methods for producing the glass ceramic are also provided.