Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Sintering and properties of lead-free (K,Na,Li)(Nb,Ta,Sb)O-3 ceramics
Year:2007
Research Areas
  • Inorganic chemistry,
  • Ceramics,
  • Magnetic materials
Information
Abstract
Abstract: Two different stoichiometric (K0.44Na0.52Li0.04)(Nb0.86Ta0.Sb-10(0.04))O-3 and non-stoichiometric (K0.38Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04) O-2.97 compositions were prepared by the conventional mixed oxide and carbonate route. Low temperature synthesis process at 700 degrees C for 2 h. and further attrition milling process resulted in agglomerated powder of 500nm of primary particles in the range of 50-70nm. The ceramics sintered at 1125 degrees C showed the highest densification that decreased for higher sintering temperatures. Non-stoichiometric composition densification process was assisted through the presence of a liquid phase that promotes grain growth and the appearance of a secondary ferroelectric phase with tungsten-bronze type structure. The samples showed a relaxor type behaviour that diminished because of the compositional homogeneity improvement of the liquid phase in the non-stoichiometric samples. The higher piezoelectric properties were obtained for the samples with high ferroelectric type dielectric constant versus temperature behaviour. In the non-stoichiometric samples piezoelectric constant d(33) values reach similar to 200pC/N.
International
Si
JCR
Si
Title
J EUR CERAM SOC
ISBN
0955-2219
Impact factor JCR
1,562
Impact info
Volume
27
Journal number
13
From page
4125
To page
4129
Month
SIN MES
Ranking
Participants
  • AUTOR: F RUBIO-MARCOS (ICV.CSIC)
  • Autor: Jose Francisco Fernández Lozano (UPM)
  • Autor: Mª Pilar Ochoa Pérez (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
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)