| 摘要 |
The invention relates to a method for producing at least one coating ( 3 ) on at least one section ( 4 ) of the surface of a body ( 2 ) by the chemical conversion of at least one constituent of the body into at least one constituent of the coating. The method is characterised in that a chemical, non-metallic compound forms the constituent of the body. The method can be described as an "intrinsic" coating method, as the coating process is not carried out by the external application of material to the surface section, but by the material conversion of the constituent of the body. The method permits the production of a body comprising at least one surface section with at least one coating that has been formed by the chemical conversion of at least one constituent of the body into at least one constituent of the coating. The body is characterised in that the constituent of the body is a chemical, non-metallic compound, for example, a chloride silicate, which is used in the form of luminescent particles as a luminescent substance in a luminescent body ( 7 ) of a light-emitting diode (LED). The coating protects the luminescent substance against decomposition by hydration or hydrolysis. The luminescent substance is characterised by improved long-term stability in comparison with similar substances in prior art.
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