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

• Type: Article in International Scientific Journal
• Date: 2007

Authors

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

Journal

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

Vol. 43 No. 2

Pages: 151-159

ISSN: 1450-5339

Publisher: Institute of Chemistry, Technology and Metallurgy

Indexing

ISI Web of Knowledge - 1 Citation

ISI Web of Science

Scopus - 1 Citation

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Physics

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific