| abstract |
Phosphor particles are provided in the form of spherical polycrystalline secondary particles consisting of a multiplicity of primary particles, including a garnet phase having the compositional formula: (A 1-x B x ) 3 C 5 O 12 wherein A is Y, Gd, and/or Lu, B is Ce, Nd, and/or Tb, C is Al and/or Ga, and 0.002 ¤ x ¤ 0.2, the secondary particles having an average particle size of 5-50 µm. |