Effect of ZrO₂ on dielectric, optical and structural properties of yttrium calcium borosilicate glasses

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• 作者：Savidh Khan ; G. Kaur ; K. Singh ; ^{kusingh@thapar.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Borosilicate glasses ; Optical band gap ; Optical basicity ; Dielectric properties
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：722-727
• 全文大小：922 K

文摘

In the present investigation, 30SiO₂−30B₂O₃−10Y₂O₃-(30-x)CaO-xZrO₂ (x=2.5, 5,7.5, 10) system has been synthesized by melt-quench technique. The as quenched samples are characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, UV–visible spectroscopy and impedance analyzer. Modification in local glassy units by ZrO₂ instead of CaO leads to change optical and dielectric properties. As ZrO₂ content increases optical band gap decreases from 3.84 eV (x=2.5) to 3.74 eV (x=10). The transmittance of infrared radiation increases with increasing ZrO₂ content. The dielectric loss (Tan δ) of all the samples is less than 2% up to 500 °C at 1 MHz. The lowest dielectric constant (~12) is observed for x=7.5 with excellent temperature and frequency stability.