Structural-optical spectroscopic investigation of new Ni2+bearing fluoro-aluminoborate glasses

被引:4
作者
Abul-Nasr, Kareem T. [1 ]
Samir, A. [2 ]
Hassan, Moukhtar A. [3 ]
Amin, Hesham Y. [4 ,5 ,6 ]
机构
[1] Port Said Univ, Fac Sci, Phys Dept, Port Said 42521, Egypt
[2] Benha Univ, Fac Engn, Basic Sci Dept, Cairo 11629, Egypt
[3] Al Azhar Univ, Fac Sci, Phys Dept, Cairo 11884, Egypt
[4] Midocean Univ, Res & Studies Ctr, Moroni 6063, Comoros
[5] Hangzhou City Univ, Sch Informat & Elect Engn, Hangzhou 310015, Peoples R China
[6] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China
关键词
Aluminum fluoride; Ligand field effects; Glass color; Optics realm; Ni2+ions; LIGAND-FIELD; NICKEL ION; PHOSPHATE; IDENTIFICATION; TRANSITIONS;
D O I
10.1016/j.optmat.2024.115078
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ni2+ bearing fluoro-aluminoborate glass composition [(AlF3)x - (B2O3)0.63-x - (NiO)0.2 - (Na2O)0.35] was prepared via the melt -quenching method. The structure of glass was confirmed by X -Ray diffraction patterns, density, molar volume and infrared spectroscopy. The oxygen and fluorine bonds with the other constituent cations are the backbone of network. Additionally, the ligand field transitions of nickel ions were assigned for octahedral and tetrahedral forms. Unexpectedly, the addition of fluorine, mixed with oxygen, increased the splitting energy of 3d -orbitals of Ni2+ ions. This unexpected behavior is back to the influence of the high field intensity of aluminum cations at the expense of boron cations. The splitting energy of 3d -orbitals (10Dq) increased, while interelectronic repulsion parameters (B and C) decreased. The chemical bonding nature was evaluated. The color variation of samples from dark brown to light brown was explained. Furthermore, the optical band gap decreased owing to the high delocalization of electrons.
引用
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页数:10
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