کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
676083 887749 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A kinetic and mechanistic study of thermal decomposition of strontium titanyl oxalate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
A kinetic and mechanistic study of thermal decomposition of strontium titanyl oxalate
چکیده انگلیسی

Thermal decomposition of anhydrous strontium titanyl oxalate proceeds through a series of complex reactions to form strontium metatitanate at high temperature. Among them the decomposition of oxalate is the first major thermal event. A kinetic study of oxalate decomposition in the temperature range 553–593 K has been carried out by cooled gas pressure measurement in vacuum. Results fitted the Zhuravlev equation for almost the entire α-range (0.05–0.92) indicating the occurrence of a diffusion-controlled, three-dimensional rate process. The activation energy has been calculated to be 164 ± 10 kJ mol−1. Results from elemental analysis, TGA, IR and SEM studies of undecomposed and partially decomposed samples have been used to supplement kinetic observations in formulating the mechanism for oxalate decomposition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 441, Issue 1, 1 February 2006, Pages 84–88
نویسندگان
, , ,