LUMINESCENT MATERIAL Russian patent published in 2010 - IPC C09K11/78 

FIELD: physics.

SUBSTANCE: in one version luminescent materials are in form of an aluminate, silicate, germanate or their combination and contain lead and/or copper as well as Eu and/or Mn, or Eu and Dy. In another version the luminescent materials are in form of a silicate or a combination of silicate and germanate and contain lead or copper, as well as Mn and/or Eu. In the third version the luminescent materials are in form of antimonite or a combination of antimonite and germanate and contain lead and/or copper, as well as Mn. The luminescent materials can be germanate or a combination of germanate and silicate and contain lead or copper, as well as Mn or Eu. In the last version the luminescent materials are in form of a phosphate or a combination of phosphate and silicate and contain lead or copper, as well as Mn and/or Eu.

EFFECT: disclosed luminescent materials enable to obtain colour rendering index in a light-emitting device Ra>90, colour temperature range from 2000 K to 8000 K and are characterised by better stability to effect of water, moisture and polar solvents.

7 cl, 20 tbl, 6 ex