[4] Univ Jena, Otto Schott Inst, D-07743 Jena, Germany
来源:
PHYSICS AND CHEMISTRY OF GLASSES
|
2000年
/
41卷
/
06期
关键词:
D O I:
暂无
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A neutron diffraction investigation of glasses in the Bi2O3-B2O3 system has been performed as a function of composition which confirms an earlier infrared study suggesting that BO4 tetrahedra are present throughout the glass formation range. The B-O bond length distribution is asymmetric and the fraction of fourfold coordinated boron atoms x(4), does not vary greatly (0.38 -0.48+/-0.07) over the range 31-67 mol% Bi2O3. There are indications that superstructural units may be present even at high Bi2O3 contents.