期刊文献+

苏州高岭石的热变过程研究 被引量:10

A STUDY ON THE THERMAL TRANSFORMATION OF SUZHOU KAOLINITE
在线阅读 下载PDF
导出
摘要 运用X射线衍射、红外光谱及固体高分辨核磁共振等手段,研究了苏州高岭石560~1600℃热变产物,结果显示:①高岭石.偏高岭石.莫来石的转变系列存在结构上的连续性,其转变经历了脱羟阶段(约400~600℃),偏高岭石阶段(600~800℃),相分离阶段(800~1100℃),莫来石阶段(1100~1600℃);②莫来石形成过程没有出现AlO3的大量分凝,但存在SiO2分凝;③偏高岭石.莫来石转变过程的中间相为Al-Si尖晶石和准莫来石;④引起1000℃放热反应的主要因素是SiO2的大量分凝,其次是准莫来石等过渡相的形成。 A combined approach of XRD, IR, DTA and ^29Si and ^27Al magic angle spin nuclear magnetic resonance (M.AS NMR) was used to analyze the thermal transformation products of the Suzhou kaolinite at the temperatures from 560- 1600℃. From the study we can draw the following conclusions: (1) the co-existence of three Al coordinations ( Ⅳ, Ⅴ, Ⅵ coordinated Al ) were detected in metakaolinite after kaolinite dehyclroxylation and Al^v became the major coordinated form; (2) the exothermie reaction near 1000 ℃ led to the formation of quasi-mullite; and (3) the mullite occurred at about 1100℃.
出处 《矿物学报》 CAS CSCD 北大核心 2007年第3期255-261,共7页 Acta Mineralogica Sinica
关键词 高岭石 偏高岭石 莫来石 谱学研究 kaolinite thermal transformation NMR Suzhou
  • 相关文献

参考文献12

  • 1Brindley G W, Nakahira M.The kaolinite- mullite reaction series[J]. Journal of the American Ceramic Society, 1959, 42(7) : 311-324
  • 2He H-P, Guo J-G, et al. Si-29 and Al-27 MAS NMR study of the thermal transformations of kaolinite from North China[ J]. Clay Minerals, 2003, 38(4) : 551-559.
  • 3Lambert J F, et al. Revisiting kaolinite dehydroxylation: A ^29Si & ^27Al MAS NMR study[J]. J Am Chem Soc, 1989, 111(10): 3522-3532.
  • 4Meinhold R H, et al. Thermal reactions of kaolinite studied by solid state ^27Al and ^29Si NMR[J]. J Mater Sco Letter, 1985, 4: 163-166.
  • 5Merwin L W, et al. ^29Si and ^27Al MAS NMR spectroscopy of Mullite[J]. Phys Chem Minerals, 1991, 18: 47-52.
  • 6Percival H J, et al. Interpretation of the Kaolinite-Mullite Sequence from Infrared Absorption Speetra[J]. J Am Ceram Soc, 1974, 57(2) : 57-61
  • 7Rocha J, Klinowski J. ^29Si and ^27Al magic-angle-spinning NMR studies of the thermal transformation of kaolinite[J]. Physics and Chemistry of Minerals,1990, 17(2): 179-186
  • 8Sanz J, et al. ^27Al and ^29Si MAS NMR study of kaolinite-mullite transformation[J]. J Am Geram Soc, 1988, 71: 418-421.
  • 9Ban T, Okada K. Analysis of local cation arrangement on muUite using ^29Si magic-angel spinning magnetic resonance spectra[J]. J Am Ceram Soc, 1993, 76(10): 2491-2496.
  • 10Watanabe T, et al. ^29 Si- and ^27 Al MAS/NMR study of the thermal transformations of kaolinite[ J ]. Clay Minerals, 1987,22 (1) : 37 -48.

二级参考文献3

  • 1郭九皋,科学通报,1991年,36卷,17期,1467页
  • 2Sanz J,J Am Ceram Soc,1988年,71卷,418页
  • 3Meinhold R H,J Mater Sci Lett,1985年,4卷,163页

共引文献45

同被引文献100

引证文献10

二级引证文献25

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部