Structural and electric–dielectric properties of B2O3–Bi2O3–Fe2O3 oxide glasses

✍ Scribed by M. Shapaan; F.M. Ebrahim

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 482 KB
• Volume: 405
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2010.04.046

✦ Synopsis

In the present study, glasses with composition (80-X) Á B 2 O 3 Á XBi 2 O 3 Á 20Fe 2 O 3 (X ¼ 10, 15 and 20 mol%) have been prepared by the conventional melt quenching technique. The glassy state of the samples is characterized using DTA and X-ray diffraction. The infrared spectra of these glasses are recorded over a continuous spectral range (400-2000 cm À 1 ) as an attempt to study their structure systematically. Systematic variation in density and molar volume in these glasses indicates the effect of Bi 2 O 3 on the glass structure. It is found that the thermal stability decreases with increasing Bi 2 O 3 content. From the electric-dielectric measurements, it is found that s dc , s ac (o) decrease and (y D /2), increases with increasing Bi 2 O 3 content. It is also observed that the dielectric constant, e 1 (o), and the loss factor, tan d, decreases with increasing Bi 2 O 3 content in this glassy system.