Abstract: The present invention relates to a process for preparing rare earth trichromatic phosphor, comprising the following steps: (1) providing precursors for at least one composition formula selected from the group consisting of CaBPO5:xEu:yTb, CaAlrB1-rPO5:xEu:yTb and Ca2B5O9Cl:xEu:yTb, wherein x=0.02–0.05 (mole ratio), y=0.001–0.01 (mole ratio) and r=0.5–0.8; (2) grinding and mixing the precursors; and (3) calcining the product obtained in step (2) at 800–1000° C. for 3–5 hours. According to the present process, only one matrix material and two rare earth reactive ions (Eu3+ and Tb3+) are required to synthesize rare earth trichromatic phosphor. That is to say, no reducing reagent is needed; and absence of reducing agent(s) reduces environmental pollution.

Abstract: The present invention relates to a process for preparing rare earth trichromatic phosphor, comprising the following steps: (1) providing a matrix material doping with both europium (Eu) and terbium (Tb); (2) grinding and mixing the said matrix material; and (3) making the product obtained in step (2) to react at 800-1000° C for 3-5 hours. According to the present process, only one matrix material and two rare earth reactive ions (Eu3+, Tb3+) are desired to synthesize rare earth trichromatic phosphor. That is to say, no reducing reagent is needed and thus no pollution is brought.