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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.44 [2006] >
IJPAP Vol.44(05) [May 2006] >
| Title: | Effect of divalent metal oxides on absorption spectra of some sodium borate glasses containing mixed nickel and iron oxides |
| Authors: | Batal, FH El
Fayad, AM
Rahman, SA El |
| Keywords: | Absorption spectra
Sodium borate glasses
Divalent metal oxides |
| Issue Date: | May-2006 |
| Publisher: | CSIR |
| IPC Code: | C03C4/12 |
| Abstract: | Absorption spectra of nickel and iron ions in some sodium
borate glasses containing magnesia, cadmium oxide, zinc oxide, lime, strontium
oxide or barium oxide were carried out to study the structure of these glasses
and the effect of divalent metal oxides on the glass structure. Nickel usually
exists in glass as divalent nickel ions in two different forms, octahedral (NiO6)
and tetrahedral (NiO4), while iron usually exists in glass as
ferrous and ferric states in two different forms, octahedral and tetrahedral
according to the glass composition. The states of the transition metal ions in
the glasses depend on several factors such as: (i) the polarizability of the
oxygen ligands surrounding the transition metal ion; (ii) the mobility of the
alkali ions and their field strengths and (iii) the opportunity of forming
network units such as MO4 for some of the divalent metal oxides. |
| Page(s): | 367-374 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.44(05) [May 2006]
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