摘要
本文应用^(51)V核磁共振研究了Na_2O·B_2O_3·V_2O_5玻璃的结构,结果表明: 1)R<0.5+K时,随着R的增加,依次形成NaV_3O_8、NaVO_3和NaVO_3-B结构。 2)R=0.5+K时,全部的V_2O_5转化为NaVO_3和NaVO_3-B结构。 3)R>0.5+K时,由于硼酸盐中非桥氧数的增加,NaVO_3-B结构逐步消失,并推测NaVO_3-B结构中的B原子为四配位结构。
The structure of Na2O-B2O3-V2O5 glasses is studied by the 51V NMR technique. The results show that,
1) as R<0.5+K, the NaV3O4, NaVO3 and NaVO3-B units are formed successively with the increasing of R.
2) as R=0.5 + K, all the V2O, units are transformed into NaVO3 and NaVO3-B units.
3) as R >0.5 + K, the number of NaVO3-B units decreases accordingly as the increasing of nonbridge-oxygen atoms in borate units, and it can be guessed that the boron atoms in NaVO3-B are 4-coordinated.
出处
《波谱学杂志》
CAS
CSCD
1990年第3期345-348,共4页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金
