Provided is a glass material that can satisfy both a high Faraday effect and a high light transmittance in a short wavelength range. A glass material contains, in % by mole, 30 to 50% Pr.sub.2O.sub.3 and 0.1 to 70% B.sub.2O.sub.3+P.sub.2O.sub.5.

Provided is a glass material that can satisfy both a high Faraday effect and a high light transmittance in a short wavelength range. A glass material contains, in % by mole, 30 to 50% Pr.sub.2O.sub.3 and 0.1 to 70% B.sub.2O.sub.3+P.sub.2O.sub.5.

Provided is a glass for radiation detection having high fluorescence detection sensitivity and high weather resistance. A glass for radiation detection, comprising, in mol %, 0.1 to 30% of SiO.sub.2+B.sub.2O.sub.3, 0 to 20% of SiO.sub.2, 0 to 10% of B.sub.2O.sub.3, 40 to 70% of P.sub.2O.sub.5, 10 to 30% of Al.sub.2O.sub.3, 10 to 30% of Na.sub.2O, and 0.01 to 2% of Ag.sub.2O.

Provided is a glass for radiation detection having high fluorescence detection sensitivity and high weather resistance. A glass for radiation detection, comprising, in mol %, 0.1 to 30% of SiO.sub.2+B.sub.2O.sub.3, 0 to 20% of SiO.sub.2, 0 to 10% of B.sub.2O.sub.3, 40 to 70% of P.sub.2O.sub.5, 10 to 30% of Al.sub.2O.sub.3, 10 to 30% of Na.sub.2O, and 0.01 to 2% of Ag.sub.2O.

A process for the manufacture of a coated combustion component. The process includes spraying one or more liquid or powdered precursors into a high temperature thermal jet directed to a surface of a combustion component and forming a surface coating derived from the precursors to provide the coated combustion component. The surface coating may comprise a phosphate glass or a silicate glass. The surface coating may have a coefficient of thermal expansion from 3 to 26 ppm/K. A coefficient of thermal expansion of the combustion component may be greater than or equal to the coefficient of thermal expansion of the surface coating. The spraying may comprise solution spraying, powder thermal spraying, suspension thermal spraying, or a combination thereof.

A process for the manufacture of a coated combustion component. The process includes spraying one or more liquid or powdered precursors into a high temperature thermal jet directed to a surface of a combustion component and forming a surface coating derived from the precursors to provide the coated combustion component. The surface coating may comprise a phosphate glass or a silicate glass. The surface coating may have a coefficient of thermal expansion from 3 to 26 ppm/K. A coefficient of thermal expansion of the combustion component may be greater than or equal to the coefficient of thermal expansion of the surface coating. The spraying may comprise solution spraying, powder thermal spraying, suspension thermal spraying, or a combination thereof.

An optical glass contains: a P.sub.2O.sub.5 component of 30 to 60 mass % (exclusive of 30); an Al.sub.2O.sub.3 component of 2 to 10 mass % (exclusive of 2); a TiO.sub.2 component of 10 to 36 mass % (exclusive of 36); an Nb.sub.2O.sub.5 component of 0 to 5 mass %; a Ta.sub.2O.sub.5 component of 0 to 15 mass %; a Bi.sub.2O.sub.3 component of 0 to 5 mass % (exclusive of 5); and an Sb.sub.2O.sub.3 component of 0 to 1 mass %; and a BaO component of 1 to 20 mass %.

An optical glass contains: a P.sub.2O.sub.5 component of 30 to 60 mass % (exclusive of 30); an Al.sub.2O.sub.3 component of 2 to 10 mass % (exclusive of 2); a TiO.sub.2 component of 10 to 36 mass % (exclusive of 36); an Nb.sub.2O.sub.5 component of 0 to 5 mass %; a Ta.sub.2O.sub.5 component of 0 to 15 mass %; a Bi.sub.2O.sub.3 component of 0 to 5 mass % (exclusive of 5); and an Sb.sub.2O.sub.3 component of 0 to 1 mass %; and a BaO component of 1 to 20 mass %.

The present disclosure provides a device and a method with which flat glasses with particularly uniform thickness can be obtained. The methods are drawing methods in which a glass ribbon is drawn. In the method an aperture is used which allows a defined very small slit between the glass ribbon and the aperture also in the case of a change of the position of the glass ribbon.

The invention relates to a filter glass comprising Na.sub.2O and K.sub.2O and the following (in % by weight on an oxide basis): TABLE-US-00001 P.sub.2O.sub.5 58-68 Al.sub.2O.sub.3 5-10 CuO 8-15 V.sub.2O.sub.5 0.05-1 SiO.sub.2 <2 F <1 Total RO (R = Mg, Ca, Sr, Ba) 0-11 Total R.sub.2O (R = Li, Na, K) 3-17.