Glass Formation Area and Structure Study of Dysprosium Lithium Borate System Used for in Vivo Radiation Synovectomy

Abstract:

Glass formation region in the Dy2O3Li2OB2O3 (DyLB) ternary system was determined by normal meltingquenching method. The relationship between composition and structure for the DyLB glasses were investigated by differential thermal analysis (DTA), Fourier transformation infrared spectra (FTIR) and Xray diffractive methods. Preliminary results show that the glass formation region of DyLB ternary system is about (0～31%)Dy2O3·(3%～13%)Li2O·(97%～60%)B2O3 (wt %), and that Dy2O3’s replacement of B2O3 turns part of ［BO3］ in the structure into［BO4］, and Dy2O3 has aggregating effect on glass network unit, resulting in the increase of the bond energy between B2O3 chains / rings. In this region, the increase of Dy2O3 content can enhance the crosslinking density in the structure, thus increasing tg and tc of the glasses.

Key words:Dy2O3Li2OB2O3 glass; differential thermal analysis; infrared spectra; glass property