The invention discloses a Eu3+doped
tantalite red fluorescent
powder and a preparing method and application therefore. The fluorescent
powder is La2-2xEu2xTa12O33, wherein x is the Eu3+doped chemical metering
score and is larger than or equal to 0.001 and smaller than or equal to 0.20, the high-temperature
solid phase method is adopted,
rare earth ions are added, and the Eu3+doped
tantalite red fluorescent
powder is prepared. The Eu3+doped
tantalite red fluorescent powder can be effectively excited by
near ultraviolet light and
blue light nearby 250 nanometers to 475 nanometers, the emission
wavelength of the Eu3+doped tantalite red fluorescent powder and the emission
wavelength of a near-
ultraviolet LED
chip are quite coincident, and under excitation of the
near ultraviolet light, the fluorescent powder can emit bright
red fluorescence, the emission
wavelength is mainly 612 nanometers, and the
red fluorescence has the quite-wide excitation spectrum and the quite-wide
luminescence spectrum; the obtained
granularity is even, the luminous efficiency is high, the
chemical stability is good,
toxic gas such as
sulfide cannot be generated under
ultraviolet radiation, the environment is friendly, and the Eu3+doped tantalite red fluorescent powder can be applied to
white light LED and the other luminous fields; in the preparing process, compounds with elements required by
synthetic materials are mixed in proportion, the high-temperature
solid phase method is adopted, the technology is simple, the Eu3+doped tantalite red fluorescent powder is free of
pollution,
environmentally friendly and suitable for industrial production.