XRD analysis shows that barium in the Pt Ba Al|O 1000 samples mainly exists as BaAl 2O 4 besides a trace of BaCO 3 phase.

• XRD结果表明 ,载体 Ba- Al- O经过 10 0 0℃焙烧后 ,Ba主要以 Ba Al2 O4形式存在 ,所含 Ba CO3较少 ;