A glass article may include SiO.sub.2, Al.sub.2O.sub.3, B.sub.2O.sub.3, at least one alkali oxide, and at least one alkaline earth oxide. The glass article may be capable of being strengthened by ion exchange. The glass article has a thickness t. The concentration(s) of the constituent components of the glass may be such that: 13≤0.0308543*(188.5+((23.84*Al.sub.2O.sub.3)+(−16.97*B.sub.2O.sub.3)+(69.10*Na.sub.2O)+(−213.3*K.sub.2O))+((Na.sub.2O−7.274)*(−7.3628)+(Al.sub.2O.sub.3−2.863)*(K.sub.2O−0.520)*(321.5)+(B.sub.2O.sub.3−9.668)*(K.sub.2O−0.520)*(−39.74)))/t.

A glass article may include SiO.sub.2, Al.sub.2O.sub.3, B.sub.2O.sub.3, at least one alkali oxide, and at least one alkaline earth oxide. The glass article may be capable of being strengthened by ion exchange. The glass article has a thickness t. The concentration(s) of the constituent components of the glass may be such that: 13≤0.0308543*(188.5+((23.84*Al.sub.2O.sub.3)+(−16.97*B.sub.2O.sub.3)+(69.10*Na.sub.2O)+(−213.3*K.sub.2O))+((Na.sub.2O−7.274)*(−7.3628)+(Al.sub.2O.sub.3−2.863)*(K.sub.2O−0.520)*(321.5)+(B.sub.2O.sub.3−9.668)*(K.sub.2O−0.520)*(−39.74)))/t.

Devices, apparatuses, and methods are disclosed that include a glass or glass ceramic substrate with a bleached region and an unbleached region. Examples include a substrate with a region that transmits IR wavelength light, and a region that is substantially opaque to IR light. Examples include additional opacity in some or all regions to visible wavelength light and/or UV wavelength light.

Devices, apparatuses, and methods are disclosed that include a glass or glass ceramic substrate with a bleached region and an unbleached region. Examples include a substrate with a region that transmits IR wavelength light, and a region that is substantially opaque to IR light. Examples include additional opacity in some or all regions to visible wavelength light and/or UV wavelength light.

The invention relates to glass articles, such as for example glass tubes or flat glasses, where the material at the surface by a targeted process control has gradient material properties which in turn result in a compressive prestress of the surface. The invention also relates to a method for the production of the glass articles as well as their use.

A strengthened cover glass or glass-ceramic sheet or article as well as processes and systems for making the strengthened glass or glass-ceramic sheet or article is provided for use in consumer electronic devices. The process comprises cooling the cover glass sheet by non-contact thermal conduction for sufficiently long to fix a surface compression and central tension of the sheet. The process results in thermally strengthened cover glass sheets for use in or on consumer electronic products.

A strengthened cover glass or glass-ceramic sheet or article as well as processes and systems for making the strengthened glass or glass-ceramic sheet or article is provided for use in consumer electronic devices. The process comprises cooling the cover glass sheet by non-contact thermal conduction for sufficiently long to fix a surface compression and central tension of the sheet. The process results in thermally strengthened cover glass sheets for use in or on consumer electronic products.

The invention relates to glass articles, such as for example glass tubes or flat glasses, where the material at the surface by a targeted process control has gradient material properties which in turn result in a compressive prestress of the surface. The invention also relates to a method for the production of the glass articles as well as their use.

A method of synthesizing a precursor for making a polymer, glass, or ceramic material is provided. The method includes reacting OPCl.sub.3 with NH.sub.3 or MNH.sub.2, where M is Li, Na, K, Mg, Ca, Ba, or combinations thereof, to form O═P(NH.sub.2).sub.3. The method then includes either: (i) reacting the O═P(NH.sub.2).sub.3 with M1NH.sub.2, where M1 is Li, Na, K, Mg, Ca, Ba, or combinations thereof, to form the precursor; or (ii) heating the O═P(NH.sub.2).sub.3 to form a branched or cyclomeric compound, and reacting the branched or cyclomeric compound with M1NH.sub.2, where M1 is Li, Na, K, Mg, Ca, Ba, or combinations thereof, to form the precursor. The precursor is an oligomer or a polymer. Uses for the precursor and the polymer, glass, or ceramic material as binders, sintering aids, adhesives, and electrolytes in battery components are also provided.

A glass sheet of the present invention has a content of Li.sub.2O+Na.sub.2O+K.sub.2O of from 0 mol % to less than 1.0 mol % and a content of B.sub.2O.sub.3 of from 0 mol % to less than 2.0 mol % in a glass composition, has a β-OH value of less than 0.20/mm, and has a thermal shrinkage ratio of 20 ppm or less when increased in temperature from normal temperature at a rate of 5° C./min, kept at a temperature of 500° C. for 1 hour, and decreased in temperature at a rate of 5° C./min.