Abstract: CaS:Mn²⁺, Eu²⁺ phosphor materials were firstly synthesized in microwave field. The materials synthesized were characterized by XRD, SEM and the fluorescent spectroscopy. The experimental results of XRD
and SEM show that the CaS:Mn²⁺, Eu²⁺ phosphors possess the crystalline structures with sphere, the mean grain sizes of phosphors are
250-400nm. The introduction of Mn²⁺ into CaS:Eu²⁺, makes the fluorescence of the CaS:Mn²⁺, Eu²⁺ phosphor efficiently
enhanced since the energy transfer from Mn²⁺ into Eu²⁺ ions. This new synthesis method compared to the traditional high temperature
solid reaction exhibits interesting features, such as rapid reactions without H₂-H₂S protective atmosphere, phosphors with high purity,
submicro-scale crystallines, and higher efficient luminescence.

Key words: microwave field, sphere, submicro-scale, fluorescence, energy transfer