Title of article
Oxidation kinetic study of copper(I) in ferroelectric ceramic [PbTiO3-PbZrO3-PbCuNbO3 + 0.5 mol%MnO2] system by high resolution thermogravimetric analysis
Author/Authors
E Torres Garc??a، نويسنده , , A Pel?iz Barranco، نويسنده , , C V?zquez، نويسنده , , F Calder?n Pi?ar، نويسنده , , O Pérez Mart??nez، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2001
Pages
6
From page
39
To page
44
Abstract
The Cu+ oxidation reaction study in the PbZr0.50Ti0.44(Cu1/4Nb3/4)0.06O3+0.5 mol%MnO2 ferroelectric ceramic was carried out using high-resolution themogravimetry (Hi-Res TGA) and the kinetic analysis was made by using the traditional criterion of the mathematical fitting of f(α) functions and the isoconversion method. A D2 diffusion mechanism with a variable activation energy value in the range 75–103 kJ/mol was obtained and the results were interpreted in two ways: an inter-crystallite oxygen diffusion and a copper(I) oxidation process.
Keywords
Kinetic oxidation , Ferroelectric system , Isoconversion method , High-resolution TGA , Thermal analysis
Journal title
Thermochimica Acta
Serial Year
2001
Journal title
Thermochimica Acta
Record number
1195090
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