Thermal, Structural, and Morphological Investigations of Modified Bismuth Silicate Glass-Ceramics

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• 作者：Ahmed H. Hammad ; A. M. Abdelghany ; Hatem A. ElBatal
• 关键词：Thermal expansion ; Electron microscopy ; FTIR spectroscopy ; Glass ; ceramics ; Bismuth silicate ; X ; ray diffraction
• 刊名：Silicon
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：9
• 期：2
• 页码：239-248
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Inorganic Chemistry; Materials Science, general; Optics, Lasers, Photonics, Optical Devices; Environmental Chemistry;
• 出版者：Springer Netherlands
• ISSN：1876-9918
• 卷排序：9

文摘

Glass-ceramics were prepared based on the basic glass composition in mole fraction 0.65 Bi₂O₃ -0.35 SiO₂ with replacements of 0.05 SiO₂ by equivalent of one of the oxides: MoO₃, WO₃, SrO, BaO or CdO. The glass transition temperature of the parent glass is 465 ∘C which is observed to decrease when doped with Mo, W, Sr, Ba, or Cd oxides. A eulytite phase is formed through controlled crystallization of the parent glass-ceramic and the samples doped with Mo or W, while a Bi₂O₂SiO₃ phase is detected for the samples doped with Sr and Cd. Orthorhombic bismuth silicate crystals were observed only in the sample doped with Ba. SEM images show that all samples have elongated particles with few rectangular or spherical crystals. BiO₆ and BiO₃ units are assumed to be formed in all samples within the characteristic IR silicate absorption bands.