Abstract: We explored the synthesis methods of Ba₃BPO₇ by the high temperature solid reaction method; single phase of Ba₃BPO₇ was obtained with 3:1
molar ratio of BaCO₃ and BPO₄, 3:1:1molar ratio of BaCO₃, NH₄H₂PO₄ and H₃BO₃, 2:1:1 molar ratio of BaCO₃, BaHPO₄ and H₃BO₃, respectively. The hydrolyzation and thermal
stability properties of Ba3BPO7 were investigated. The results show that Ba₃BPO₇ can react with water and form the final
products of Ba₃(PO₄)₂, Ba₅(PO₄)₃OH and Ba(OH)₂; TG-DTA shows that it melts congruently and its melting point is about
1353℃. The X-ray excited luminescent properties of Ba₃BPO₇ with rare earth activated were also investigated. The results show that
there is energy transfer between the host and rare earth ions.

Key words: alkaline earth borophosphate, hydrolyzation, X-ray excited luminescent properties