Crystallization kinetics of amorphous Pb (Fe2/3W1/3) O3

✍ Scribed by Nam-Kyoung Kim; D. A. Payne

• Book ID: 104737763
• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 594 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00356007

✦ Synopsis

Kinetic data analyses on the crystallization behaviour of amorphous lead iron tungstate (PFW) were carried out. A low value of the glass transition/melting point ratio (0.52) and a high value of the frequency factor (2 x 1037s -I) of the first crystallization exotherm may indicate a high degree of metastability of the prepared PFW in the amorphous state. The Avrami exponent was determined to be ~ 3.0, which suggests a bulk nucleation. The activation energy for crystallization was averaged to be 520 kJ mol 1 for the first exotherm. The validity of the estimated values of the Avrami exponent and the activation energy were confirmed by comparing with an independently obtained product of the two parameters.