Preparation and Thermal Decomposition Kinetics of Stable PZT Sol

被引：0

作者：

Chen Z. ^{[1
]}

Chen Q. ^{[1
]}

Chen X. ^{[2
]}

Liao Z. ^{[1
]}

机构：

[1] Faculty of Material and Energy, Guangdong University of Technology, Guangzhou

[2] Foshan Zilm Technology Co., Ltd, Foshan, 528000, Guangdong

来源：

Liao, Zhengfu (liaozhengfu@126.com) | 1600年 / Chinese Ceramic Society卷 / 48期

关键词：

Perovskite structure; Sol-gel method; Stability; Thermal decomposition kinetics;

D O I：

10.14062/j.issn.0454-5648.20190752

中图分类号：

学科分类号：

摘要：

A [Pb(Zr0.53Ti0.47)O3](PZT) sol was prepared by Sol-gel method, and the stability of PZT sol was tracked and characterized for 120 days. Through the pH value evolving with time test, it was found that the pH value was kept in the range of 4.81 to 5.52. The analysis showed that particle size distribution ranged from 1.3 to 17.1 nm, and Zeta potential ranged from -10.23 to -17.57 mV, which indicates the prepared PZT sol had good storage stability. By means of thermogravimetry-differential scanning calorimetry, thermogravimetric infrared analysis, X-ray diffraction and X-ray energy spectrum analysis, it is found that the thermal decomposition process of PZT sol can be divided into three stages; According to transmission electron microscopy (TEM) and selected area electron diffraction (SAED) analysis, it can be seen that the exposed crystal face groups of the heat-treated products are (110) and (101). Finally, the thermal decomposition mechanism and kinetics of PZT sol were studied by thermogravimetry-derivative thermogravimetry method, combined with Flynn-Wall-Ozawa method, Achar method and Satava method, the results show that: the activation energy in the first stage Eα=58.24 kJ•mol-1, following the first-order Mample single-line rule; the activation energy in the second stage Eα=171.46 kJ•mol-1, following three-dimensional diffusion (Jander); and the activation energy in the third stage Eα=319.56 kJ•mol-1, following the phase boundary reaction shrinkage cylinder rule. © 2020, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：1437 / 1445

页数：8

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