Structural, thermal, optical, and photoacoustic study of nanocrystalline Bi{sub 2}Te{sub 3} produced by mechanical alloying

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3520658· OSTI ID:21538016

Souza, S M; Triches, D M; Poffo, C M ^[1]; Lima, J C. de; Grandi, T A ^[2]; Biasi, R S. de ^[3]

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1. Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Campus Universitario Trindade, C.P. 476, Florianopolis, Santa Catarina 88040-900 (Brazil)
2. Departamento de Fisica, Universidade Federal de Santa Catarina, Campus Trindade, C.P. 476, Florianopolis, Santa Catarina 88040-900 (Brazil)
3. Secao de Engenharia Mecanica e de Materiais, Instituto Militar de Engenharia, 22290-270 Rio de Janeiro-RJ (Brazil)

Nanocrystalline Bi{sub 2}Te{sub 3} was produced by mechanical alloying and its properties were investigated by differential scanning calorimetry (DSC) x-ray diffraction (XRD), Raman spectroscopy (RS), and photoacoustic spectroscopy (PAS). Combining the XRD and RS results, the volume fraction of the interfacial component in as-milled and annealed samples was estimated. The PAS results suggest that the contribution of the interfacial component to the thermal diffusivity of nanostructured Bi{sub 2}Te{sub 3} is very significant.

• OSTI ID: 21538016
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 1; Other Information: DOI: 10.1063/1.3520658; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ANNEALING
BINARY ALLOY SYSTEMS
BISMUTH ALLOYS
BISMUTH TELLURIDES
CALORIMETRY
CRYSTAL STRUCTURE
CRYSTALS
NANOSTRUCTURES
OPTICAL PROPERTIES
PHOTOACOUSTIC SPECTROSCOPY
RAMAN SPECTRA
RAMAN SPECTROSCOPY
TELLURIUM ALLOYS
THERMAL DIFFUSIVITY
THERMODYNAMIC PROPERTIES
X-RAY DIFFRACTION
ALLOY SYSTEMS
ALLOYS
BISMUTH COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
HEAT TREATMENTS
LASER SPECTROSCOPY
PHYSICAL PROPERTIES
SCATTERING
SPECTRA
SPECTROSCOPY
TELLURIDES
TELLURIUM COMPOUNDS