Low-temperature phase transformation in NaBH4 under pressure

Low-temperature phase transformation in NaBH4 under pressure

The pressure-temperature structural phase diagram of NaBH4 has been mapped by thermal conductivity measurements below room temperature and up to 2 GPa. The critical transition temperature for the transformation from the low-temperature tetragonal structure to the room temperature cubic one increases...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Vol. 73; no. 9; p. 092102
Main Authors: Sundqvist, Bertil, Andersson, Ove
Format: Journal Article
Language:English
Published: 2006
Subjects:
Condensed matter physics
cubic
Fysik
high pressure
Hydride
hydrogen storage
Kondenserade materiens fysik
NaBH4
NATURAL SCIENCES
NATURVETENSKAP
order-disorder
orientational ordering transition
phase diagram
phase transition
Physics
tetragonal
thermal conductivity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The pressure-temperature structural phase diagram of NaBH4 has been mapped by thermal conductivity measurements below room temperature and up to 2 GPa. The critical transition temperature for the transformation from the low-temperature tetragonal structure to the room temperature cubic one increases from near 190 K at zero pressure to about 235 K at 2 GPa. The thermal conductivity data are consistent with the order-disorder character of the transition.
ISSN:1098-0121
DOI:10.1103/PhysRevB.73.092102