Kinetics of non-isothermal crystallization of Bi3Sr2Ca2Cu3−xSnxO10+δ glass–ceramics

✍ Scribed by H. Koralay; S. Cavdar; M.A. Aksan

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 364 KB
• Volume: 405
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2010.09.006

✦ Synopsis

Kinetics of crystallization in Bi 3 Sr 2 Ca 2 Cu 3 À x Sn x O 10 + d (x ¼0.05, 0.10 and 0.15) glass was studied by the non-isothermal method using differential thermal analysis (DTA). In this order, the DTA curves have been registered with different heating rates (5, 10, 15 and 20 1C min À 1 ) up to 900 1C. The glass transition temperature, crystallization temperature and nature of crystalline phases formed were determined. From the variation of DTA peak maximum temperature with heating rate, the activation energies of crystallization were calculated to be 337, 344 and 367 kJ mol À 1 for x ¼0.05, 0.10 and 0.15, respectively, by using the Kissinger method. The values of the Avrami exponent (n) were 2.34, 2.76 and 3.84 for x ¼ 0.05, 0.1 and 0.15, respectively. The glass transition temperature varies from 451.2 to 475.0 1C depending on the composition of the glass.