The invention discloses a preparation method of an LED remote excitation fluorescent
powder layer. The preparation method is characterized by comprising the following steps that (1), aluminum
oxide suspension is prepared; (2), a bonding agent is prepared; (3), a surfactant is prepared; (4), fluorescent
powder slurry is prepared, specifically, a certain
mass of fluorescent
powder is weighed according to the needed luminescent characteristics, the three solutions prepared in the step (1), the step (2) and the step (3) are added, full and uniform stirring is conducted, and the needed fluorescentpowder
slurry is obtained; (5), the fluorescent powder
slurry is applied and dried, specifically, the fluorescent powder slurry is applied to the inner wall of a lampshade through a selected applyingmethod and then dried, and a fluorescent powder
colloid layer with the uniformly-dispersed fluorescent powder is obtained; and (6), the temporary bonding agent is removed, specifically, the organic temporary bonding agent in the fluorescent powder
colloid layer is removed as needed, and the final needed fluorescent powder layer is obtained. According to the preparation method, the process is simple, the
operability is high, the production efficiency can be improved to a great extent, and the
product property can be improved.