◇2质量计算(注：相对原子量 O=15.9994, Bi=208.9804, Eu=151.9640)
（1）掺Eu=1%
0.99Bi2O3 + 0.01Eu2O3 = (Bi0.99Eu0.01)2O3
   x         y          15g     
465.9590             464.8187    
(15/464.8187)/(x/465.9590) = 100/99   x = 14.8864g  y = 15-x = 0.1136g

(2) 掺Eu=5%
0.95Bi2O3 + 0.05Eu2O3 = (Bi0.95Eu0.05)2O3
x         y            15g       
465.9590              460.2574    
(15/460.2574)/(x/465.9590) = 100/95   x = 14.4265g  y = 15-x = 0.5735g

(3) 掺Eu=10%
0.90Bi2O3 + 0.1Eu2O3 = (Bi0.90Eu0.1)2O3
x          y          15g        
  465.9262          454.5557      
(15/454.5557)/(x/465.9590) = 100/90   x = 13.8387g  y = 15-x = 1.1613g

(4) 掺Eu=15%
0.85Bi2O3 + 0.15Eu2O3 = (Bi0.85Eu0.15)2O3 铕掺杂氧化铋的红色荧光材料的合成与发光性能研究(6):http://www.youerw.com/cailiao/lunwen_7960.html