Structural investigations of vanadyl doped Nb2O5•K2O•B2O3 glasses

被引：2
|
作者：
Anshu [1 ]
Sanghi, S. [1 ]
Agarwal, A. [1 ]
Lather, M. [1 ]
Bhatnagar, V. [2 ]
Khasa, S. [1 ,3 ]
机构：
[1] Maharshi Dayanand Univ, Dept Phys, Govt Coll Women, Rohtak 124001, Haryana, India
[2] Sch Appl Sci & Human, Ansal Inst Technol, Gurgaon, Haryana, India
[3] Govt Coll Women, Dept Phys, Rohtak 124001, Haryana, India
来源：
INTERNATIONAL SEMINAR ON SCIENCE AND TECHNOLOGY OF GLASS MATERIALS (ISSTGM 2009) | 2009年 / 2卷
关键词：
D O I：
10.1088/1757-899X/2/1/012054
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Pottasium nioborate glasses of composition xNb(2)O(5)center dot(30-x)K2O center dot 69B(2)O(3) containing 1 mol % of V2O5 were prepared by melt quench technique (1473K, 1h). The electron paramagnetic resonance spectra of VO2+ in these glasses have been recorded in X- band (v approximate to 9.14 GHz) at room temperature (RT). The spin Hamiltonian parameters, dipolar hyperfine coupling parameters, P and Fermi contact interaction parameter, K have been calculated. It is found that V4+ ions in these glasses exist as VO2+ in octahedral coordination with a tetragonal distortion. The tetragonality of V4+O6 complex decreases with increasing Nb2O5:K2O ratio and also there is an expansion of 3d(XY) orbit of unpaired electron in the vanadium ion. The study of IR transmission spectra over a range 400- 4000 cm(-1) depicts the presence of both BO3 and BO4 structural units and Nb5+ ions are incorporated into the glass network as NbO6 octahedra, substituting BO4 groups.
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页数：4
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