Improvement of the phase diagram for the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system

Venet, M; Zabotto, F L; Eiras, J A; Garcia, D

doi:10.1063/1.3152588

Title: Improvement of the phase diagram for the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system

Full Record
Other Related Research

Abstract

Characteristics of phase transitions of lead barium niobate compositions around the morphotropic phase boundary were investigated. Using structural characterizations, it was found that the morphotropic phase boundary extends toward a wide composition range, in which both tetragonal (4mm) and orthorhombic (m2m) tungsten bronze phases coexist. In addition, on heating, two phase transitions were observed for all the studied compositions. First, the fraction with m2m symmetry phase transforms into the 4mm symmetry one and, second, the 4mm symmetry phase, which represents the whole material, transforms into the paraelectric phase (4/mmm symmetry). The phase transition temperatures were determined from dielectric characterizations. These results helped to improve the phase diagram of the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system around the morphotropic phase boundary region.

Authors:

Venet, M; Zabotto, F L; Eiras, J A; Garcia, D ^[1]

Department of Physics, Ferroelectric Ceramics Group, Federal University of Sao Carlos, Sao Carlos, Sao Paulo 13565905 (Brazil)

Publication Date:: Mon Jun 15 00:00:00 EDT 2009

OSTI Identifier:: 21352262

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 105; Journal Issue: 12; Other Information: DOI: 10.1063/1.3152588; (c) 2009 American Institute of Physics; Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; BARIUM COMPOUNDS; CERAMICS; FERROELECTRIC MATERIALS; HEATING; LEAD COMPOUNDS; NIOBATES; ORTHORHOMBIC LATTICES; PERMITTIVITY; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; PIEZOELECTRICITY; POLARIZATION; SINTERING; TEXTURE; TRANSITION TEMPERATURE; TUNGSTEN BRONZE; ALKALINE EARTH METAL COMPOUNDS; ALLOYS; COPPER ALLOYS; COPPER BASE ALLOYS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIAGRAMS; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ELECTRICAL PROPERTIES; ELECTRICITY; FABRICATION; INFORMATION; MATERIALS; NIOBIUM COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; TUNGSTEN ALLOYS

Citation Formats


                    Venet, M, Zabotto, F L, Eiras, J A, and Garcia, D. Improvement of the phase diagram for the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system.  United States: N. p., 2009. 
        Web.  doi:10.1063/1.3152588.

Copy to clipboard


                    Venet, M, Zabotto, F L, Eiras, J A, & Garcia, D. Improvement of the phase diagram for the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system.  United States.  https://doi.org/10.1063/1.3152588

Copy to clipboard


                    Venet, M, Zabotto, F L, Eiras, J A, and Garcia, D. 2009.  
        "Improvement of the phase diagram for the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system".  United States.  https://doi.org/10.1063/1.3152588.

Copy to clipboard


                    
@article{osti_21352262,

  title        = {Improvement of the phase diagram for the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system},

  author       = {Venet, M and Zabotto, F L and Eiras, J A and Garcia, D},

  abstractNote = {Characteristics of phase transitions of lead barium niobate compositions around the morphotropic phase boundary were investigated. Using structural characterizations, it was found that the morphotropic phase boundary extends toward a wide composition range, in which both tetragonal (4mm) and orthorhombic (m2m) tungsten bronze phases coexist. In addition, on heating, two phase transitions were observed for all the studied compositions. First, the fraction with m2m symmetry phase transforms into the 4mm symmetry one and, second, the 4mm symmetry phase, which represents the whole material, transforms into the paraelectric phase (4/mmm symmetry). The phase transition temperatures were determined from dielectric characterizations. These results helped to improve the phase diagram of the pseudobinary PbNb{sub 2}O{sub 6}-BaNb{sub 2}O{sub 6} system around the morphotropic phase boundary region.},

  doi          = {10.1063/1.3152588},

  url          = {https://www.osti.gov/biblio/21352262},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 12,

  volume       = 105,

  place        = {United States},

  year         = {Mon Jun 15 00:00:00 EDT 2009},

  month        = {Mon Jun 15 00:00:00 EDT 2009}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1063/1.3152588

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Microstructure-property relations in tungsten bronze lead barium niobate, Pb sub 1 minus sub x Ba sub x Nb sub 2 O sub 6

Journal Article Randall, C; Guo, R; Bhalla, A; ... - Journal of Materials Research; (United States)

Transmission electron microscopy (TEM) has been used to explore details of the structural phase transitions and corresponding microstructural features in the solid solution of Pb{sub 1{minus}{ital x}}Ba{sub {ital x}}Nb{sub 2}O{sub 6}(PBN) tungsten bronze ferroelectrics at compositions embracing the morphotropic phase boundary between orthorhombic and tetragonal ferroelectric phases. In addition to the ferroelectric domain structures that were consistent with the expected symmetries, incommensurate ferroelastic phases were observed. The onset'' and lock-in'' transition temperatures are a function of the Pb/Ba ratio, and for lead-rich compositions it appears that the incommensurate distortion may occur above the ferroelectric Curie temperature in the paraelectric phase.
https://doi.org/10.1557/JMR.1991.1720
Dielectric properties of PbNb{sub 2}O{sub 6} ferroelectric ceramics at cryogenic temperatures

Journal Article Guerra, J; Venet, M; Garcia, D; ... - Applied Physics Letters

Complex dielectric permittivity measurements in PbNb{sub 2}O{sub 6} ceramics were performed in a frequency and temperature range of 1 kHz-1 MHz and from 15 to 900 K, respectively. The results revealed two dielectric anomalies showing typical characteristics of relaxor ferroelectric materials at cryogenic temperatures. Comparison with other tetragonal tungsten bronze (TTB) structure-type materials suggests the existence of successive phase transitions, which until now were not reported. The observed low temperature dielectric behaviors seem to be due to intrinsic physical characteristics related to the TTB structure.
https://doi.org/10.1063/1.2769765
Effect of particle size and strain on phase stability of (Li{sub 0.06} Na{sub 0.94}) NbO{sub 3}

Journal Article Shinde, A.; Krishna, P. - Journal of Applied Physics

Alkaline niobates are most suitable and excellent candidates for lead free piezoceramics, as they exhibit morphotropic phase boundary and have ultra-large piezoresponse similar to them. We provide direct experimental evidence of ferroelectric to paraelectric phase transition in (Li{sub 0.06} Na{sub 0.94})NbO{sub 3} with reduction of particle size using a combination of x-ray and neutron powder diffraction techniques at room temperature. Detailed Rietveld analyses of x-ray data show variation of particle sizes from micrometer to nanometer for sintered, calcined, and ball milled powders. The ferroelectric orthorhombic phase for micron sized powder (∼1.17 μm) is found to transform to paraelectric phase bymore »« less
https://doi.org/10.1063/1.4875481
Study on diffuse antiferroelectric-paraelectric phase transition in pseudobinary Pb(Fe/sub 1/2/Nb/sub 1/2/)O/sub 3/-xPb(Mg/sub 1/2/W/sub 1/2/)O/sub 3/ solid solution

Journal Article Choo, W; Lee, M - J. Appl. Phys.; (United States)

An antiferroelectric-paraelectric diffuse phase transition in pseudobinary (1-x)Pb(Fe/sub 1/2/Nb/sub 1/2/)O/sub 3/-xPb(Mg/sub 1/2/W/sub 1/2/)O/sub 3/ solid solution for 0.60< or =x< or =1.00 is investigated by its dielectric property and calorimetric measurements. The dielectric constant shows a diffuse phase transition behavior for 0.60 < or =x< or =0.88, but shows a sharp phase transition behavior for 0.90< or =x< or =1.00. The apparent dielectric transition temperature increases with increasing external frequency for 0.60< or =x< or =0.88, but remains constant with respect to the change in external frequency for 0.90< or =x< or =1.00. Dielectric curves as a function of temperaturemore »« less
https://doi.org/10.1063/1.330102
Phase transitions in quasi-one-dimensional selenide BaNbSe{sub 3} and superconductivity in BaNb{sub 2}Se{sub 5}

Journal Article Ohtani, T; Honji, S; Takano, M - Journal of Solid State Chemistry

Samples with various compositions around BaNbSe{sub 3} were prepared. X-ray analysis revealed that the compound is stable at the composition of BaNb{sub 0.80}Se{sub 3}, which formally requires Nb{sup 5+} ions (d{sup 0}). The single-phase region extends to the composition BaNb{sub 0.95}Se{sub 3}. A semiconductor-to-metal transition was observed at {approximately}140 K in BaNb{sub 0.95}Se{sub 3}. Seebeck measurements showed that the dominant carriers were electrons, which are considered to originate from Nb{sup 4+} ions d{sup 1} coexisting with Nb{sup 5+} ions. On the basis of detailed phase study, the transition was revealed to be intrinsic to BaNb{sub 0.95}Se{sub 3} with a slightmore »« less
https://doi.org/10.1006/jssc.1997.7443

Similar Records