Please wait a minute...
ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2003, Vol. 4 Issue (3): 363-368    DOI: 10.1631/jzus.2003.0363
Chemical and Biotechnology     
Study on the thermal decomposition kinetics of nano-sized calcium carbonate
LI Dai-xi, SHI Hong-yun, DENG Jie, XU Yuan-zhi
Chemistry Department, Guizhou University, Guizhou 550025, China; Chemistry Department, Zhejiang University, Hangzhou 310027, China
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

Abstract  This study of the thermal decomposition kinetics of various average diameter nano-particles of calcium carbonate by means of TG-DTA(thermogravimetry and differential thermal analysis) showed that the thermal decomposition kinetic mechanisms of the same crystal type of calcium carbonate samples do not vary with decreasing of their average diameters; their pseudo-active energy Ea; and that the top-temperature of decomposition Tp decreases gently in the scope of micron-sized diameter, but decreases sharply when the average diameter decreases from micron region to nanometer region. The extraordinary properties of nano-particles were explored by comparing the varying regularity of the mechanisms and kinetic parameters of the solid-phase reactions as well as their structural characterization with the variation of average diameters of particles. These show that the aggregation, surface effect as well as internal aberrance and stress of the nano-particles are the main reason causing both Ea and Tp to decline sharply with the decrease of the average diameter of nano-particles.

Key words： Nano-particle      Aggregation      Non-isothermal kinetics      Surface effect      Phase interface reaction     
Received: 08 October 2002     
CLC:  O614.23  
  O643.12  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
LI Dai-xi
SHI Hong-yun
DENG Jie
XU Yuan-zhi
Cite this article:

LI Dai-xi, SHI Hong-yun, DENG Jie, XU Yuan-zhi. Study on the thermal decomposition kinetics of nano-sized calcium carbonate. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(3): 363-368.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2003.0363     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2003/V4/I3/363

[1] Kun Yang, Zi-li Yi, Qing-feng Jing, Dao-hui Lin. Dispersion and aggregation of single-walled carbon nanotubes in aqueous solutions of anionic surfactants[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(8): 624-633.
[2] GUO Hui, WANG Yun-peng, WANG Zhi-guang, ZHOU Jing-li. Improving network service performance and reliability via links trunking technologies[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(6 ): 11-.