Characterization of alpha <->beta PbF2 phase transition by several techniques

Citation
Kf. Portella et al., Characterization of alpha <->beta PbF2 phase transition by several techniques, J MATER SCI, 35(13), 2000, pp. 3263-3268
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE
ISSN journal
0022-2461 → ACNP
Volume
35
Issue
13
Year of publication
2000
Pages
3263 - 3268
Database
ISI
SICI code
0022-2461(200007)35:13<3263:COA<PP>2.0.ZU;2-F
Abstract
X-ray Diffraction (XRD), Dynamic-Mechanical Analysis (DMA), Impedance Spect roscopy (IS), and Scanning Electron Microscopy (SEM) have been used to the study of alpha --> beta phase transition in PbF2 pellets pressed uniaxially in the 37 MPa-480 MPa range. A mixture of beta and alpha phases is detecte d and the alpha-phase content at room temperature is found to be dependent on the applied load. The dilation results on DMA, the phase identification by XRD, the ionic conductivity results by IS analysis and the SEM micrograp hs of beta-PbF2 pellets show evidences for the increase in alpha-phase cont ent at the expense of the beta-phase. SEM analysis provided further evidenc e for specimen sintering under heating at approximately 498 K. (C) 2000 Klu wer Academic Publishers.