Structural and physical analysis of borosilicate glasses with Pr3+ ions
Priyanka Goyal, Sudha Pal, Umesh Chandra Bind and Yogesh Kumar Sharma
Volume 2, Issue 2, Page 119-124, Year 2017 | DOI: 10.5185/amp.2017/212
Keywords: Physical properties, absorption spectra, Urbach’s energy, energy and Judd – Ofelt intensity parameters.
Abstract: The present works gives the information about the structural and physical analysis of borosilicate glasses with praseodymium ions. Glass specimen were prepared with the chemical composition (50-x) B2O3 - (10+x) SiO2 – 10Na2O – 20PbO – 10ZnO - 1Pr6O11 (where x= 0, 5, 10, 15, 20, 25, 30, 35, 40) by standard method. The composition of the glass specimens was finalized by EDX. The presence of various stretching and bending vibrations are confirmed with the help of FTIR analysis. The borate network of the present glass samples lies in the wavelength range 500-1600 cm-1 and confirmed by the TEM image. Anti-symmetric stretching vibrations with three non-bridging oxygens of B – O – B groups are present at ~1488 cm-1. XRD were recorded for confirmation of the amorphous nature of the samples. The SEM image confirmed the XRD results. Various physical parameters have been calculated for knowing the structure of present glass with increasing the SiO2 concentration. Oxygen Packing Density (OPD) decreases with increase in SiO2 concentration. Decrease in the value of OPD shows that glass structure is now loosely packed. Absorption spectra of the glass samples were recorded in UV-VIS/NIR region. JO intensity, Racah, Slater-Condon, Lande parameters have been computed. W2 parameter gives information about the glass structure and depends upon the Pr – O bond in the host matrix. Optical energy band gap and Urbach’s energy values were calculated for exploring the electronic band structure. Copyright © 2017 VBRI Press.