Affordable Access

Publisher Website

Characterization of Al–Ti phases in cycled TiF3-enhanced Na2LiAlH6

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
416
Identifiers
DOI: 10.1016/j.jallcom.2005.08.053
Keywords
  • Powder X-Ray Diffraction
  • Synchrotron Radiation
  • Metal Hydrides
  • Crystal Structure
  • Alanates

Abstract

Abstract TiF 3-enhanced Na 2LiAlH 6 was investigated after dehydrogenation–hydrogenation cycles by synchrotron X-ray diffraction. There was no sign of Ti after ball-milling with TiF 3, but two types of Al–Ti phases were observed in the cycled samples. In a sample after measuring five pressure–composition isotherms in the temperature range from 170 to 250 °C, a fcc phase with a = 3.987 Å was observed. This phase is considered to be Al 3Ti with the L1 2 structure. Samples after one or four cycles at selected temperatures between 170 and 250 °C showed diffraction from another fcc phase with a ≈ 4.03 Å. This indicates formation of an Al 1− y Ti y solid-solution phase with y ≈ 0.15 similar to previously reported for cycled NaAlH 4 with Ti additives.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Adjustment of the decomposition path for Na2LiAlH6...

on International Journal of Hydro... Jan 01, 2011

Pressure–composition isotherms and thermodynamic p...

on Journal of Alloys and Compound... Jan 01, 2005

Enhanced hydrogen storage performance of LiAlH4–Mg...

on International Journal of Hydro... Jan 01, 2011

Synthesis of Na3AlH6and Na2LiAlH6by mechanical all...

on Journal of Alloys and Compound... Jan 01, 1999
More articles like this..