摘要
通过对叶蜡石20~1 300℃热处理产物进行系统的差热分析、X射线衍射分析和红外光谱分析等的研究,发现叶蜡石加热相变过程具有明显的阶段性.根据主要物相及其变化和组合特征,可以将叶蜡石的加热相变过程分为4个阶段,即叶蜡石阶段(室温~660℃)、偏叶蜡石阶段(660~1 100℃)、不定形SiO2 与莫来石形成阶段(1 100~1 200℃)、莫来石与方石英共存阶段(≥1 300℃).
The characteristics of heating phase transformation of pyrophyllite during 20~1 300℃ are studied by DTA analysis, X-ray diffraction analysis and IR spectra analysis. The results show that the phase transformation of pyrophyllite occurs stage by stage during heating. According to the major phase and their assemblage, four stages can be devided, i.e., the pyrophyllite stage(indoor temperature660℃),pyrophyllite anhydride stage(6601 100℃),amorphous SiO_(2) and mullite crystallite forming stage(1 1001 200℃), and coexistence stage of mullite and cristoblite(≥1 300℃).
出处
《吉林大学学报(地球科学版)》
EI
CAS
CSCD
北大核心
2005年第2期150-154,共5页
Journal of Jilin University:Earth Science Edition
基金
国家留学基金委出国留学基金资助(2003)
关键词
叶蜡石
相变
偏叶蜡石
莫来石
方石英
pyrophyllite
phase transformation
pyrophyllite anhydride
mullite
cristobalite