The behaviour of the lattice parameters in the Bi-Sn-Zn system

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

Maria Helena Sousa Soares de Oliveira Braga (Autor) FEUP; J. Ferreira (Autor) Outra; Luís Filipe Malheiros de Freitas Ferreira (Autor) FEUP

Revista

Título: Journal of Mining and Metallurgy, Section B: Metallurgy

Vol. 43 Nº 2

Páginas: 151-159

ISSN: 1450-5339

Editora: Institute of Chemistry, Technology and Metallurgy

Indexação

ISI Web of Knowledge - 1 Citação

ISI Web of Science

Scopus - 1 Citação

Classificação Científica

FOS: Ciências exactas e naturais > Física

CORDIS: Ciências Físicas > Física

Outras Informações

ID Authenticus: P-004-DQJ

DOI: 10.2298/JMMB0702151B

Abstract (EN): Lattice parameters, coefficients of thermal expansion and mass density were determined by means of X-ray powder diffraction between 30 and 180 ºC (or 240 ºC - depending on samples' composition). Rietveld refinement was performed in order to obtain phases' lattice parameters at each temperature. The Panalytical X´Pert Pro MPD was used for room temperature X-ray diffraction experiments (RTXRD) with bulk samples. The aim was to identify the phases that were present in the sample, as well as, their lattice parameters. For some samples, powder high temperature X-ray diffraction measurements (HT-XRD) were also performed, under a vacuum of 10-5 mbar or an argon atmosphere. It was found that the lattice parameters of (Bi), (Sn) and (Zn) don't change with the composition, at room temperature, as expected since all samples belong to the three phase region. It was also concluded that (Bi) behaves like an isometric crystalline solid on the contrary of (Zn) that has different expansion coefficients for different crystallographic directions a (= b) and c.

Idioma: Inglês

Tipo (Avaliação Docente): Científica