Disclosed herein are glasses that present several advantages over traditional glass compositions used in optical applications. The glasses disclosed herein have a low devitrification tendency and can be processed by melt quenching and formed into macroscopic components. The glasses have high glass thermal stability indices and are chemically durable. The glasses disclosed herein are transparent when heat treated in air or oxygen and have high refractive indices and low density, as well, making them suitable for optical applications.

Disclosed herein are glasses that present several advantages over traditional glass compositions used in optical applications. The glasses disclosed herein have a low devitrification tendency and can be processed by melt quenching and formed into macroscopic components. The glasses have high glass thermal stability indices and are chemically durable. The glasses disclosed herein are transparent when heat treated in air or oxygen and have high refractive indices and low density, as well, making them suitable for optical applications.

A borophosphate glass composition including B.sub.2O.sub.3, P.sub.2O.sub.5, and CaO, and optionally a source additive selected from: Li.sub.2O, Na.sub.2O, K.sub.2O, Al.sub.2O.sub.3, ZnO, MgO, Fe.sub.2O.sub.3/FeO, CuO/Cu.sub.2O, and mixtures thereof, as defined herein. Also disclosed are bioactive compositions or substrates including the disclosed borophosphate glass composition, and at least one live cell. Also disclosed are methods of inhibiting or increasing the relative amount of species containing boron, phosphorous, or both, being released into an aqueous solution from aborophosphate glass composition defined herein. Also disclosed is a method of proliferating cells on a bioactive substrate as defined herein. Also disclosed are related glass compositions that exclude one of B.sub.2O.sub.3, P.sub.2O.sub.5, and CaO.

A borophosphate glass composition including B.sub.2O.sub.3, P.sub.2O.sub.5, and CaO, and optionally a source additive selected from: Li.sub.2O, Na.sub.2O, K.sub.2O, Al.sub.2O.sub.3, ZnO, MgO, Fe.sub.2O.sub.3/FeO, CuO/Cu.sub.2O, and mixtures thereof, as defined herein. Also disclosed are bioactive compositions or substrates including the disclosed borophosphate glass composition, and at least one live cell. Also disclosed are methods of inhibiting or increasing the relative amount of species containing boron, phosphorous, or both, being released into an aqueous solution from aborophosphate glass composition defined herein. Also disclosed is a method of proliferating cells on a bioactive substrate as defined herein. Also disclosed are related glass compositions that exclude one of B.sub.2O.sub.3, P.sub.2O.sub.5, and CaO.

Provided is an etching method for a glass, including an etching step (S2) of immersing a glass (G) in an etching liquid (E) to subject the glass (G) to etching treatment. The etching step (S2) includes causing the etching liquid (E) to relatively flow with respect to a surface (MS) of the glass (G), to thereby subject the glass (G) to the etching treatment.

Provided is an etching method for a glass, including an etching step (S2) of immersing a glass (G) in an etching liquid (E) to subject the glass (G) to etching treatment. The etching step (S2) includes causing the etching liquid (E) to relatively flow with respect to a surface (MS) of the glass (G), to thereby subject the glass (G) to the etching treatment.

The present invention relates to a conductive paste and a method for producing solar cell by using the same. The conductive paste comprises at least silver powders and a composite glass frit comprising a first type of glass frit containing lead oxides and silicon oxides and a second type of glass frit containing tellurium oxides and zinc oxides wherein the first type of glass frit and the second type of glass frit are in a weight ratio of 93:7 to 44:56.

The present invention relates to a conductive paste and a method for producing solar cell by using the same. The conductive paste comprises at least silver powders and a composite glass frit comprising a first type of glass frit containing lead oxides and silicon oxides and a second type of glass frit containing tellurium oxides and zinc oxides wherein the first type of glass frit and the second type of glass frit are in a weight ratio of 93:7 to 44:56.

Disclosed herein are glasses that present several advantages over traditional glass compositions used in optical applications. The glasses disclosed herein have a low devitrification tendency and can be processed by melt quenching and formed into macroscopic components. The glasses have high glass thermal stability indices and are chemically durable. The glasses disclosed herein are transparent when heat treated in air or oxygen and have high refractive indices and low density, as well, making them suitable for optical applications.

Disclosed herein are glasses that present several advantages over traditional glass compositions used in optical applications. The glasses disclosed herein have a low devitrification tendency and can be processed by melt quenching and formed into macroscopic components. The glasses have high glass thermal stability indices and are chemically durable. The glasses disclosed herein are transparent when heat treated in air or oxygen and have high refractive indices and low density, as well, making them suitable for optical applications.