In one aspect, a method for use in preparing a glass comprises: performing a first ion exchange process to replace at least a first ion in the glass with at least a second ion, the second ion being smaller than the first ion; and performing a second ion exchange process to replace at least the second ion in the glass with at least a third ion, the third ion being larger than the first ion. In another aspect, a glass is prepared at least in part by: performing a first ion exchange process to replace at least a first ion in the glass with at least a second ion, the second ion being smaller than the first ion; and performing a second ion exchange process to replace at least the second ion in the glass with at least a third ion, the third ion being larger than the first ion.

In one aspect, a method for use in preparing a glass comprises: performing a first ion exchange process to replace at least a first ion in the glass with at least a second ion, the second ion being smaller than the first ion; and performing a second ion exchange process to replace at least the second ion in the glass with at least a third ion, the third ion being larger than the first ion. In another aspect, a glass is prepared at least in part by: performing a first ion exchange process to replace at least a first ion in the glass with at least a second ion, the second ion being smaller than the first ion; and performing a second ion exchange process to replace at least the second ion in the glass with at least a third ion, the third ion being larger than the first ion.

A coated glass or glass ceramic article is provided that has a so-called dead front effect, where display features or icons are not visible in the off state. In some embodiments, the glass or glass ceramic article includes a sheet-like glass or glass ceramic substrate having two opposite faces, where the substrate exhibits, in a visible spectral range from 380 nm to 780 nm, light transmittance .sub.vis of at least 1% for visible light that passes through from one face to the opposite face. An opaque coating on one face that exhibits, in the visible spectral range from 380 nm to 780 nm, light transmittance .sub.vis of not more than 5%. An opening is provided in the opaque coating. The opening allowing light that is incident on the surface of the opaque coating to pass through the coating and through the glass or glass ceramic substrate. The opening has a width of not more than 80 m at the glass or glass ceramic substrate.

A coated glass or glass ceramic article is provided that has a so-called dead front effect, where display features or icons are not visible in the off state. In some embodiments, the glass or glass ceramic article includes a sheet-like glass or glass ceramic substrate having two opposite faces, where the substrate exhibits, in a visible spectral range from 380 nm to 780 nm, light transmittance .sub.vis of at least 1% for visible light that passes through from one face to the opposite face. An opaque coating on one face that exhibits, in the visible spectral range from 380 nm to 780 nm, light transmittance .sub.vis of not more than 5%. An opening is provided in the opaque coating. The opening allowing light that is incident on the surface of the opaque coating to pass through the coating and through the glass or glass ceramic substrate. The opening has a width of not more than 80 m at the glass or glass ceramic substrate.

A cover glass article includes a glass body having a three-dimensional shape, an inside surface, and an outside surface. Each of the inside and outside surfaces has a surface roughness (R.sub.a) less than 1 nm and is free of indentations having diameters larger than 150 ?m.

An X-ray and gamma-ray shielding glass, including the following components in weight-%: 10-35% SiO.sub.2; 60-70% PbO; 0-8% B.sub.2O.sub.3; 0-10% Al.sub.2O.sub.3; 0-10% Na.sub.2O; 0-10% K.sub.2O; 0-0.3% As.sub.2O.sub.3; 0-2% Sb.sub.2O.sub.3; 0-6% BaO; and 0.05-2% ZrO.sub.2.

The present invention relates to conductive pastes, suitable for use in solar cells, a method for the manufacture of a light receiving surface electrode of a solar cell, a light receiving electrode for a solar cell and a solar cell. The paste comprises a solids portion dispersed in an organic medium, the solids portion comprising electrically conductive metal, and mixed oxide, wherein the mixed oxide is a tellurium-bismuth-cerium mixed oxide and is substantially lead-free and substantially silicon-free.

A glass composition includes greater than or equal to 45 mol % to less than or equal to 60 mol % SiO.sub.2; greater than or equal to 15 mol % to less than or equal to 25 mol % Al.sub.2O.sub.3; greater than or equal to 10 mol % to less than or equal to 20 mol % Li.sub.2O; greater than or equal to 0 mol % to less than or equal to 7.5 mol % Na.sub.2O; greater than or equal to 0 mol % to less than or equal to 5 mol % K.sub.2O; greater than or equal to 7 mol % to less than or equal to 13 mol % P.sub.2O.sub.5, and greater than or equal to 0 mol % to less than or equal to 4 mol % TiO.sub.2. The glass composition may have a liquidus temperature of less than or equal to 1300 C. and an inter-diffusion coefficient greater than or equal to 4000 m.sup.2/hour. The glass composition is chemically strengthenable. The glass composition may be used in a glass-based article or a consumer electronic product.

In one aspect, a method for use in preparing a glass includes performing an ion exchange process by treating the glass with a eutectic mixture including at least a first rubidium salt. In another aspect, a glass is prepared at least in part by performing an ion exchange process by treating the glass with a eutectic mixture including at least a first rubidium salt.

In one aspect, a method for use in preparing a glass includes performing an ion exchange process by treating the glass with a eutectic mixture including at least a first rubidium salt. In another aspect, a glass is prepared at least in part by performing an ion exchange process by treating the glass with a eutectic mixture including at least a first rubidium salt.