Multiple-Quantum and Cross-Polarized 27Al MAS NMR of Mechanically-Treated Mixtures of Kaolinite and Gibbsite

Sharon Elizabeth Ashbrook, Jamie McManus, Kenneth JD MacKenzie, Stephen Wimperis

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Mixtures of the clay mineral kaolinite with gibbsite, when heated, form mullite, a high-temperature ceramic. The Al-27 multiple-quantum magic angle spinning (MQMAS) NMR technique is used to study the local Al environment in mixtures of kaolinite and gibbsite that have been ground together for varying amounts of time. This mechanical treatment forms new chemical species that are amorphous in nature and, therefore, unsuited to analysis by X-ray diffraction. Both novel and established cross-polarization techniques are employed to characterize the starting materials and mixtures, confirm the spatial proximity of H-1 and Al-27 nuclei, and "edit" the two-dimensional Al-27 MQMAS NMR spectra, thereby allowing overlapping peaks corresponding to octahedral Al sites to be studied.

Original languageEnglish
Pages (from-to)6408-6416
Number of pages9
JournalJournal of Physical Chemistry B
Volume104
DOIs
Publication statusPublished - 13 Jul 2000

Keywords

  • ANGLE-SPINNING NMR
  • NUCLEAR-MAGNETIC-RESONANCE
  • HIGH-RESOLUTION NMR
  • QUADRUPOLAR NUCLEI
  • NUTATION NMR
  • MULLITE
  • SPECTRA
  • SOLIDS
  • SPECTROSCOPY
  • PRECURSORS

Fingerprint

Dive into the research topics of 'Multiple-Quantum and Cross-Polarized 27Al MAS NMR of Mechanically-Treated Mixtures of Kaolinite and Gibbsite'. Together they form a unique fingerprint.

Cite this