Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Phase transitions in PbTixHf1-xO3 determined by thermal analysis and impedance spectroscopy
Year:2009
Research Areas
  • Ceramics,
  • Magnetic materials
Information
Abstract
Abstract: The objective of this study is to determine the influence of partial substitutions of Ti4+ by isovalent Hf4+ in the perovskite-type crystalline structure of PbTiO3. Different samples over the whole composition range (0 a parts per thousand currency sign xa parts per thousand currency sign1) in the PbTi1-xHfxO3 family have been prepared. Phase transitions have been determined by thermal analysis (differential scanning calorimeter: DSC) and complex impedance spectroscopy (IS) over a wide temperature range. As a consequence of the cation replacement the changes that take place in the different phase transition temperature are reported. By both techniques, thermal analysis and electrical characterization, it is shown that for all compositions prepared there is only one phase transition in a temperature range between 230 and 460 A degrees C. With these results and the previously known crystalline structure of pure PbTiO3 and PbHfO3 perovskites, the phase diagram of the PbTi1-xHfxO3 family is presented including a morphotropic phase transition at x similar to 0.5.
International
No
JCR
No
Title
Journal of thermal analysis and calorimetry
ISBN
1388-6150
Impact factor JCR
0
Impact info
Volume
98
10.1007/s10973-009-0111-7
Journal number
3
From page
793
To page
799
Month
DICIEMBRE
Ranking
Participants
  • Participante: Roberto E Alonso (Natl Univ La Plata, Fac Ciencias Exactas)
  • Autor: Jose de Frutos Vaquerizo (UPM)
  • Participante: Alberto Lopez Garcia (Natl Univ La Plata, Fac Ciencias Exactas)
  • Autor: Miguel Ángel De La Rubia López (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Propiedades ópticas, eléctricas y magnéticas de materiales y sus aplicaciones (POEMMA)
  • Departamento: Física Aplicada a las Tecnologías de la Información
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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