Optical Band Gap, Oxidation Polarizability, Optical Basicity and Electronegativity Measurements of Silicate Glasses Using Ellipsometer and Abbe Refractometer

• 作者: Zahid Hussain
• 来源期刊: 玻璃与陶瓷期刊(英文)
• 学科: 工学
• 关键词: Glass Optical Properties Thermal Properties Physical Properties ELLIPSOMETRY
• 年，卷（期）: 2021,（1）
• 页码范围: 1-33
• 页数: 33页
• 分类号: TQ1

摘要

<div style="text-align:justify;"> The values of refractive index (<i>n</i>) for silicate glasses (silica, soda lime and borosilicate 7059) are decreased from 1.5119 to 1.5111, 1.5086 to 1.5065 and 1.5296 to 1.5281, respectively;and the optical band gap (<i>E_g</i>) is increased from 9.8 to 9.81 eV, 9.845 to 9.88 eV and 9.56 to 9.58 eV, respectively over the temperature range 295 - 473 K using ellipsometer at wavelength 632.8 nm. While <i>n</i> is decreased from 1.5276 to 1.5274, 1.5074 to 1.5070 and from 1.5283 to 1.5281, respectively;and <i>E_g</i> is increased from 9.59 to 9.592 eV, 9.862 to 9.870 eV, and 9.574 to 9.58 eV, respectively over the temperature range 297 - 322 K using Abbe refractometer at wavelength 589.3 nm. The values of oxide ion polarizability [<i>α</i>_o2- <span "="">(<i>n</i>) and</span> <i>α</i>_o2-<span "=""></span><span "="">(<i>E_g</i>)] regarding silica, soda lime and borosilicate 7059 glasses are decreased from 1.3427 to 1.3408, 1.6014 to 1.5941, 1.4329 to 1.4193, respectively over the temperature range 295 - 473 K using ellipsometer;and are decreased from 1.3786 to 1.3764, 1.5991 to 1.5969, 1.4297 to 1.4191, respectively over the temperature range 297 - 322 K using Abbe refractometer. Similarly, the values of optical basicity [<i>A</i></span> <span "="">(<i>n</i>) and <i>A</i></span> <span "="">(<i>E_g</i>)] of silica, soda lime, and borosilicate 7059 glasses are decreased from 0.4272 to 0.4245, 0.6271 to 0.6224, 0.5045 to 0.4933, respectively over the temperature range 295 - 473 K using ellipsometer;and are decreased from 0.4586 to 0.4567, 0.6256 to 0.6242, 0.5018 to 0.4930, respectively over the temperature range 297 - 322 K using Abbe refractometer. <b>Further,</b> we have found that for silica, soda lime and borosilicate 7059, the values of electronegativity (<i>ξ_1av</i>)</span><span minion="" pro="" capt","serif";"=""> QUOTE </span><span cambria="" math","serif";font-style:italic;"=""></span><span cambria="