Low-temperature phase transformation in NaBH4 under pressure

• The pressure-temperature structural phase diagram of NaBH4 has been mapped by thermal conductivitymeasurements below room temperature and up to 2 GPa. The critical transition temperature for the transformationfrom the low-temperature tetragonal structure to the room temperature cubic one increases from near190 K at zero pressure to about 235 K at 2 GPa. The thermal conductivity data are consistent with theorder-disorder character of the transition.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Hydride

hydrogen storage

NaBH4

high pressure

phase diagram

phase transition

orientational ordering transition

thermal conductivity

tetragonal

cubic

order-disorder

Condensed matter physics

Kondenserade materiens fysik

Publikations- och innehållstyp

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