Structural and thermal behavior of proclay kaolinite using high energy ball milling process

Rabah Hamzaoui, Fadhilah Muslim, Sofiane Guessasma, Abdelkrim Bennabi, Jacques Guillin

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

Planetary ball mill is used to process kaolinite clay powder under a commercial name of proclay kaolinite. Influence of milling time on structure and thermal behavior of proclay kaolinite are presented and discussed. X-ray powder diffraction shows that peak intensities, at kaolinite characteristic positions, decrease gradually and decay after 3. hours of milling. Amorphous structure of kaolinite forms with a nanocrystalline quartz. The mean crystallite size of nanocrystalline quartz is found to decrease from D. = 30. ±. 2. nm for unmilled powder to D. = 7. ±. 1.5. nm after 9. hours of processing. For the same time shift, thermal analysis shows that specific heat capacity of unmilled powder increases from 0.93. J/g.K to 1.65. J/g.K for milled powder.

Original languageEnglish
Pages (from-to)228-237
Number of pages10
JournalPowder Technology
Volume271
DOIs
Publication statusPublished - 1 Feb 2015

Keywords

  • Ball milling
  • Proclay kaolinite
  • Structure
  • Thermal behavior

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