Browsing by Author "LHR TP 6076"

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    Effect of TiO2 on the Structural, Mechanical and Optical Properties of Bioactive Glasses
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2020) Muhammad Zahid; CIIT/FA18-RPH-002/LHR; Dr. Junaid Amjad; LHR TP 6076
    The aim of the study presented in this thesis is to prepare bioactive sodium base borophosphate system with varying titanium content and fixed ratio of calcium oxide.This study aims to provide the structural, mechanical and optical analysis of such glasses to have a proper insight in the glass structure for better understanding of structure property correlation. Amorphous materials have open structure, so they can facilitate in the conduction. Samples were characterized by UV-Visible near Infrared (UV-Vis-NIR) spectroscopy. Understanding the novel application of bioactives borophosphate glass system in bone tissue engineering to be used as bone graft material. It is worth important to fabricate material with enhanced chemical durability, mechanical strength, sufficient thermal expension coefficient and bioactivity to further develop these biomedical devices. Present study provides the effect of structural, mechanical and optical properties of borophosphate glasses. Five Boro-phosphate samples with composition 70 B2O3 – 25 Na2O3 – 5 P2O5 – 1 CaO – x TiO2 where x=0 %, 0.1%, 0.3%, 0.5% and 1, weight % were prepared using melt quenching method. From the results of X-ray Diffraction (XRD), it was confirmed that the structure of the samples was amorphous and Na2O2 played an important role in assisting the glass formation. Amorphous materials have open structure, so they can facilitate in the conduction. Samples were characterized by UV-Visible near Infrared (UV-Vis-NIR) spectroscopy. From the results, direct and indirect energy band gaps were calculated. Direct energy band gaps were in the range 3.59 eV - 4.18 eV. Indirect band gaps were in the range 2.92 eV - 3.95 eV. Refractive index was also calculated which was in the range 2.19 - 2.42.