Conversion material, particularly for a white or colored light souce comprising a semiconductor light source, a method for the production thereof, as well as a light source comprising said conversion material

A conversion material, comprising a matrix glass that, as bulk material for a thickness d of about 1 mm has a sure transmission τi of greater than 80% in the wavelength region from 350 to 800 nm and in the region in which the primary light source emits light, and is formed as a sintered compact from a powder of the matrix glass with a grain size distribution d10>=0.7 μm, d50>=3 μm, and d90<=150 μm,

• wherein the conversion material is produced by a method comprising the steps of:
• providing a matrix glass,
• grinding said matrix glass to powders with a grain size distribution of grain sizes d10>=0.7 μm, d50>=3 μm, and d90<=150 μm,
• mixing said ground matrix glass with a luminophore present in powdered form,
• pressing said ground matrix glass mixed with the luminophore present in powdered form, and
• sintering said pressed mixture containing the matrix glass and the luminophore.

A light source, in particular a white or colored light source, comprising:

• a conversion material comprising a matrix glass that, as bulk material, for a thickness d of about 1 mm, has a pure transmission τi of greater than 80% in the wavelength region from 350 to 800 nm and in the region in which the primary light source emits light, and is formed as a sintered compact from a powder of the matrix glass with a grain size distribution d10>=0.7 μm, d50>=3 μm, and d90<=150 μm,
• wherein the conversion material is produced by a method comprising the steps of:
• providing a matrix glass,
• grinding said matrix glass to powders with a grain size distribution of grain sizes d10>=0.7 μm, d50>=3 μm, and d90<=150 μm,
• mixing said ground matrix glass with a luminophore present in powdered form,
• pressing said ground matrix glass mixed with the luminophore present in powdered form, and
• sintering said pressed mixture containing the matrix glass and the luminophore, and
• a primary light source, in particular a semiconductor light source as primary light source, which emits light with wavelengths in the region from 225 nm to 520 nm, preferably from 350 nm to 480 nm, most preferably with wavelengths in the region from 400 nm to 480 nm.