Reaction kinetics and formation mechanism of magnesium ferrites

2005 ◽  
Vol 425 (1-2) ◽  
pp. 131-136 ◽  
Author(s):  
Jong-Gyu Paik ◽  
Man-Jong Lee ◽  
Sang-Hoon Hyun
Keyword(s):  
Reaction Kinetics ◽  
Formation Mechanism

Nonisothermal reaction kinetics and preparation of ferroelectric strontium bismuth niobate with a layered perovskite structure

2004 ◽  
Vol 19 (10) ◽  
pp. 2956-2963 ◽  
Author(s):  
Chung-Hsin Lu ◽  
Wei-Tse Hsu ◽  
Jiun-Ting Lee
Keyword(s):  
Reaction Kinetics ◽  
Formation Mechanism ◽  
Integral Method ◽  
Correlation Coefficients ◽  
Differential Method ◽  
Layered Perovskite ◽  
Heating Rates ◽  
Integral Methods ◽  
Diffusion Controlled ◽  
Layered Perovskite Structure

Ferroelectric layered perovskite SrBi2Nb2O9 has been successfully prepared through a new process using BiNbO4 as a precursor. The SrBi2Nb2O9 formation mechanism was investigated using a nonisothermal analysis method at constant heating rates. The weight loss recorded in thermal analysis under different heating rates was analogized to the reaction conversion. A combination of the differential and integral methods was introduced to solve the reaction mechanisms. Analysis using the differential method revealed that two kinds of diffusion-controlled models have higher linear correlation coefficients than other models. Based on the integral method principle, a new integral equation combining the Arrhenius equation and the Lobatto approximation was derived in this study. The established equation significantly simplified the conventional calculation process and improved the accuracy for predicting the reaction models. Analysis using the integral method corroborated that the SrBi2Nb2O9 formation mechanism is governed by Jander's diffusion controlled model, and the activation energy was calculated to be 192.1 kJ/mol. The proposed methods and the derived equations can be further applied to other solid-state-reaction systems to elucidate their reaction kinetics and estimate the related kinetic parameters.

Reaction Kinetics and Formation Mechanism of TiO2 Nanorods in Solution: An Insight into Oriented Attachment

2014 ◽  
Vol 118 (45) ◽  
pp. 26332-26340 ◽  
Author(s):  
Cheng-Si Tsao ◽  
Chih-Min Chuang ◽  
Chun-Yu Chen ◽  
Yu-Ching Huang ◽  
Hou-Chin Cha ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Formation Mechanism ◽  
Tio2 Nanorods ◽  
Oriented Attachment ◽  
Insight Into

Study of C2H5O2 using modulated photolysis: ultra-violet spectrum and self-reaction kinetics in the temperature range 233-363 K

1997 ◽  
Vol 94 ◽  
pp. 484-502
Author(s):  
S Fauvet ◽  
JP Ganne ◽  
J Brion ◽  
D Daumont ◽  
J Malicet ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Ultra Violet ◽  
Temperature Range

SYNTHESIS AND REACTION KINETICS STUDY OF TRI PHENYL PHOSPHITE

2019 ◽  
Vol 2 (2) ◽  
pp. 99-106
Author(s):  
Satish M. Mane ◽  
M. Praharaj Bhatnagar ◽  
M. R. Sawant ◽  
B. N. Thorat
Keyword(s):  
Reaction Kinetics ◽  
Kinetics Study
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