Non-isothermal decomposition kinetics of nano-Mg(OH)<sub>2</sub> using thermal gravimetric analysis

LI Ge; LI Zenghe; MA Hongwen; CHEN Dengli

doi:10.3969/j.issn.0438-1157.2014.02.030

您当前的位置：

首页 >

文章列表页 >

Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis

更新时间：2025-12-10

- Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis
- CIESC Journal Issue 2, Pages: 576-582(2014)
- 作者机构：
  
  1. 北京化工大学理学院,北京,100029
  2. 中国地质大学矿物材料国家专业实验室,北京,100083
  3. 中国石油辽阳石化亿方工业公司,辽宁,辽阳,111003
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.02.030
  CLC： Q028.8
- Online First：05 February 2014，
  
  Published：05 February 2014
- 稿件说明：
移动端阅览
LI Ge, LI Zenghe, MA Hongwen, et al. Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis[J]. CIESC Journal, 2014, (2): 576-582. DOI: 10.3969/j.issn.0438-1157.2014.02.030.
DOI：

LI Ge, LI Zenghe, MA Hongwen, et al. Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis[J]. CIESC Journal, 2014, (2): 576-582. DOI: 10.3969/j.issn.0438-1157.2014.02.030. DOI：

摘要

以白云石为原料，盐酸酸溶后得到CaCl2-MgCl2滤液，采用氨水直接沉淀法制备出符合HG/T 3607—2000Ⅰ型标准的六方片状的纳米氢氧化镁。六方片厚度为25～30 nm，直径为0.3～0.4 mm。利用热重分析法对纳米氢氧化镁在不同升温速率下的热分解动力学进行研究，以期深入了解纳米氢氧化镁热分解制备纳米氧化镁粉体过程的物理化学本质。采用Kissinger法和Ozawa法计算出氢氧化镁热分解反应活化能分别为115.47 kJ·mol-1和126.04 kJ·mol-1。对热重分析数据进行处理和拟合，判断纳米氢氧化镁粉体热分解反应机理函数为Avrami-Erofeev（n=1.5）的随机成核和随后生长机理。指前因子为3.077×1010 s-1。纳米氢氧化镁经煅烧制备得到的氧化镁纳米球的直径为80～100 nm。

Abstract

Hexagonal nano-magnesium hydroxide with thickness of 25—30 nm and diameter of 0.3—0.4 μm was synthesized via acid immersion and ammonia precipitation from dolomites. Its quality met the standards of typeⅠ in HG/ T 3607—2000. The thermal decomposition kinetics of Mg(OH)2 was investigated by using thermal gravimetric analysis at different heating rates for deep understanding of physical chemistry in this process. The activation energies of decomposition estimated by the Kissinger and Ozawa methods were 115.47 kJ·mol-1 and 126.04 kJ·mol-1 respectively. Decomposition reaction of magnesium hydroxide was controlled by Avrami-Erofeev function (n=1.5). Pre-exponential was 3.077×1010 s-1. Nano-magnesium oxide with average diameter of 80—100 nm was prepared after calcination of magnesium hydroxide.

关键词

Keywords

references

Views

451

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Thermal decomposition model for solution of 40% dicumyl peroxide

Thermal decomposition kinetics of humic acid

Thermal decomposition and isothermal kinetic model of bis-2, 4-dichlorobenzoyl peroxide

Thermo-oxidative degradation characteristics of TPT backsheet from end-of-life photovoltaic modules

Molecular dynamics simulation study on hydrogen permeation performance and aging mechanism of PA6 inner liner material for type Ⅳ hydrogen storage cylinders

Related Author

DONG Ze

CHEN Liping

CHEN Wanghua

MA Yingying

CHENG Liang

ZHANG Baolin

XU Li

HOU Cuihong

Related Institution

School of Chemical Engineering, Nanjing University of Science & Technology

Solvay(China) Co., Ltd.

School of Chemical Engineering and Energy, Zhengzhou University

Department of Safety Engineering, Nanjing University of Science and Technology

State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University

⁰

Non-isothermal decomposition kinetics of nano-Mg(OH)2 using thermal gravimetric analysis

DOI：10.3969/j.issn.0438-1157.2014.02.030

摘要

Abstract

关键词

Keywords

references

Non-isothermal decomposition kinetics of nano-Mg(OH)₂ using thermal gravimetric analysis