The invention relates to fluorescent
powder using
silicon-aluminum base
nitrogen oxides as base materials and a preparation method thereof, which belong to the field of
nitrogen oxide preparation and luminescent materials thereof. The fluorescent
powder has the composition of M<6-a-c>X<2a>Al<4-b>SiNO<12-b>:cR or M<6-a-c>X<2a>Al<4-b>SiNO<12-b>:(2c / 3)R, wherein a crystalline phase represented by M<6-a-c>X<2a>Al<4-b>SiNO<12-b> is used as a major ingredient, and R is used as an optical activity element, wherein M represents any one
ion or the combination of any two ions in Ca<2+>, Sr<2+>, Ba<2+> and Zn<2+>, X represents any one
ion or the combination of any two ions in Li<+>, Na<+> and K<+>, R is any one
ion or the combination of any two ions in Ce, Eu, Bi, Mn, Sn, Tb, Tl, Pb and Sm, a is greater than or equal to 0 and is smaller than or equal to 2, b is greater than or equal to 2 and is smaller than or equal to 3, and c is greater than or equal to 0.001 and is smaller than or equal to 0.2. The fluorescent
powder of the invention has good fluorescent performance in the visible
light wave band range. When being excited by
ultraviolet light, the fluorescent powder has higher luminescent intensity and wider luminescent spectrum. The fluorescent powder can be used for luminescent
layers of power type
semiconductor illumination devices.