RELATIONSHIP BETWEEN LUMINESCENCE AND MATRICES IN THE SYSTEM AL2O3-B2O3-CE2O3

The system Al2O3-B2O3-Ce2O3, with Al/B ratio varying from 4.5 to 2 and Ce/(Al + B) = 0.02, has been prepared at the temperature from 1 200 t o 1 400 degrees C. Relationship between luminescence and matrices in t he system Al2O3-B2O3-Ce2O3 was investigated. It was found that some ch anges of the matrices occurred with Al/B ratio varying from 4.5 to 2. These results lead to a great change in luminescence properties, indic ating variation of Ce-surroundings of crystal field. With the decrease of the ratio from 3 to 2, the excitation and emission peaks shift to shorter wavelengths. it was also found that a new type of rare earth l uminescent materials was obtained with appropriate Al/B ratio.