Quantitative Aspects of 27Al MAS NMR of Calcium Aluminoferrites

✍ Scribed by Jørgen Skibsted; Hans J. Jakobsen; Christopher Hall

• Book ID: 104375412
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 458 KB
• Volume: 7
• Category: Article
• ISSN: 1065-7355
• DOI: 10.1016/s1065-7355(97)00017-5

✦ Synopsis

27

Al MAS NMR spectra of synthetic calcium aluminoferrites, Ca 2 Al x Fe 2Ϫx O 5 with x ϭ 0.93, 1, 1.33, reveal only a few percent of the expected intensity for the 27 Al central transition, indicating that the calcium aluminoferrite phase in Portland cements can barely be observed by 27 Al MAS NMR. This result supports the use of 27 Al MAS NMR for quantitative analysis of the tricalcium aluminate phase in Portland cements.