The invention discloses a main emission peak changeable and adjustable fluorescent material and a preparation method thereof and relates to a light-emitting
diode (LED) illuminating / displaying fluorescent material and a preparation method thereof. The fluorescent material is an alkaline earth
oxygen fluorine silicon aluminum
acid salt fluorescent material. The chemical general formula is Mx-zY6-x-y-zAl11-xLxO25.5-0.5kFk: yCe3+, zMn2+, wherein Ce3+ and Mn2+ are
luminescence center ions, the x is larger than or equal to 0 and smaller than or equal to 1.5, the y is larger than or equal to 0.01 and smaller than or equal to 0.16, the z is larger than or equal to 0 and smaller than or equal to 0.2, the k is larger than 0 and smaller than or equal to 0.01, M is Mg2+ or Ba2+, L is Si4+ or Zr4+, according to the chemical general formula, MgO, MgF2, Al2O3, AlF3, SiO2, ZrO2, BaF2, BaCO3, MnCO3 and CeO2 are mixed in a closed container to obtain a mixture, and the mixture is subjected to heat preservation in a reduction furnace of 1620 DEG C at H2
atmosphere, cooling, crushing, grading and sieving to obtain the alkaline earth
oxygen fluorine silicon aluminum
acid salt fluorescent material. According to the fluorescent material and the preparation method thereof, the main emission peak of green, yellow and orange is changeable and adjustable, the fluorescent material is used for
white light LED illuminating / displaying, under the excitation of
blue light LED, high luminous efficiency can be achieved, and the
wavelength is in a range from 530nm to 585nm.