Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1480886 | Journal of Non-Crystalline Solids | 2014 | 4 Pages |
•Diffusion of copper ions in silicate glasses by means of ion exchange affects the morphology of the matrix.•After hydrogenation, the glass is less polymerized around the atomic copper and copper oxide than around the copper ions.•The local rearrangement can lead to a short-range ordering into different phases e.g. the mixed sodium–copper silicates.
The presence of copper in an optically transparent soda-lime silicate glass was investigated after an ion exchange with copper ions and hydrogenation of the exchanged samples. The valence of copper in the chemically treated samples has been estimated by optical absorption. Raman spectroscopy and transmission electron microscopy were used to study the effect of the dopant upon the microstructure of the produced materials. It has been stated that copper enters the glass matrix in the form of mono- and divalent ions. The Jahn/Teller effect has been suggested as responsible for some of the detected phenomena. Transmission electron microscopy observations evidenced the formation of Cu2O particles already in as-exchanged specimens. After hydrogenation the copper oxide particles appear as separate pellets or narrow strips around the colloidal copper particles. Raman spectra reveal numerous modifications of the SiO4 vibrational units throughout changes of the spectral position of the bending and stretching bands located at about 500 and 1000 cm− 1, respectively.