Patent ID: 8057703
Filing Date: 2011-11-15
Classification: C09K

Abstract:
1. A three-band phosphor for agricultural plastic film, comprising a silicate-based substrate prepared from a group IIA element and activated by d-f element, wherein the three-band phosphor pertains to (MeO) 2α (SiO 2 ) α silicate series, in which α=1,2,3, ΣMe +2 =Ba +2 and/or Sr +2 and/or Ca +2 and/or Mg +2 , having an orthorhombic crystal architecture, and generating a three-band spectrum when activated by d-f element, the three-band phosphor having a stoichiometric equation of (Ba 0.5 Sr 1.5 Ca 1.0 Mg 1.0 )Si 2 O 8 :EuSmMn, an orthorhombic crystal lattice structure, activator atomic fraction: 0.001≦Eu≦0.01, 0.0001≦Sm≦0.005 and 0.005≦Mn≦0.15, capable of having the three-band visible spectrum be within the blue-green-red zone when band strength ratio is 1:2:2˜1:2:4.