Preparation method of aluminate blue fluorescent powder for three-color light-emitting diode

The invention discloses a preparation method of aluminate blue fluorescent powder for the three-color light-emitting diode (LED). The technology has the following main steps: 1) utilizing the hydrothermal reaction method to synthetize a semi-finished product BaMgAl10O17:Eu ; and 2) annealing the semi-finished product in reduction atmosphere to improve crystallization and reduce the semi-finished product to BaMgAl10O17:Eu . The raw materials used in the method contain Al(NO3)3.9H2O, Ba(NO3)2, Mg(NO3)2.6H2O and Eu2O3 and also contain CO(NH2)2 and PEG2000; and the prepared blue fluorescentpowder using aluminate as matrix can be well excited by the near ultraviolet to give out efficient blue light. In addition, the technology provided by the invention is simple, the synthesis temperature of the product can be greatly reduced and the synthesized fluorescent powder has regular shape, uniform particles, high luminous efficiency and potential application prospect.