Paper Title:
The Impact of Heat Treatment on Pyrophyllite Structure and Acid-Soluble Properties
  Abstract

This paper studied the influence of heat treatment on the pyrophyllite structure and acid-soluble properties of alumina. Qualitative tests had been performed in studying pyrophyllite crystal at different temperatures by XRD, TG-DTA, FT-IR and quantitative analysis of Al2O3. The quantitative titration method studied the dissolve characteristics of the different heat treatment samples in different acid conditions, and then a numerical simulation was done. The results showed that at temperatures below 480 °C, the pyrophyllite did not change the basic structure. 480~700 °C dehydroxylation reaction occurred, and the structure water of pyrophyllite is removed, and then turned into partial pyrophyllite. Dissolution experiments showed that after thermal activation the behavior of alumina in acid the dissolution was different, which was affected by hydrochloric acid concentration, heat activation temperature and acid leaching time. When the calcinations temperature was 700 °C, the dissolution amount of alumina was largest. These works could provide some theoretical basis for further application of pyrophyllite research.

  Info
Periodical
Chapter
Chapter 2: Material Science and Manufacturing Technology
Edited by
Helen Zhang and David Jin
Pages
326-329
DOI
10.4028/www.scientific.net/AMR.366.326
Citation
J. J. Wu, H. F. Chen, S. J. Zhao, B. Li, "The Impact of Heat Treatment on Pyrophyllite Structure and Acid-Soluble Properties", Advanced Materials Research, Vol. 366, pp. 326-329, 2012
Online since
October 2011
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Price
$32.00
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