New high permittivity tetragonal tungsten bronze dielectrics Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe

McCabe, Emma E

doi:10.1016/j.jssc.2009.11.032

Title: New high permittivity tetragonal tungsten bronze dielectrics Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe

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Abstract

The new phases Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe were prepared by solid state reaction at 1100 deg. C. They have the tetragonal tungsten bronze structure, space group P4/mbm, at room temperature. The two octahedral sites show partial order of M and Nb with preferential occupancy of the smaller B(1) sites by M. Both phases have high permittivities 90+-15 over the range 10-320 K. Ba{sub 2}LaFeNb{sub 4}O{sub 15} is highly insulating with bulk conductivity <<10{sup -8} ohm{sup -1} cm{sup -1} at 25 deg. C and tan delta<<0.001 over the range 100-320 K and at 10{sup 5} Hz. Solid solutions between these new phases and the compositionally and structurally related relaxor ferroelectric Ba{sub 2}LaTi{sub 2}Nb{sub 3}O{sub 15} show gradual loss of ferroelectric behaviour attributed to replacement of polarisable Ti{sup 4+} by a mixture of (Mn, Fe){sup 3+} and Nb{sup 5+}. - Graphical Abstract: Tetragonal tungsten bronze structure of Ba{sub 2}La(Mn, Fe)Nb{sub 4}O{sub 15} from two different viewpoints.

Authors:

McCabe, Emma E ^[1]

Department of Engineering Materials, University of Sheffield, Mappin Street, Sheffield, S1 3JD (United Kingdom)

Publication Date:: Mon Mar 15 00:00:00 EDT 2010

OSTI Identifier:: 21372530

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry

Additional Journal Information:: Journal Volume: 183; Journal Issue: 3; Other Information: DOI: 10.1016/j.jssc.2009.11.032; PII: S0022-4596(09)00561-1; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; BARIUM COMPOUNDS; FERROELECTRIC MATERIALS; IRON COMPOUNDS; LANTHANUM COMPOUNDS; MANGANESE COMPOUNDS; NIOBIUM COMPOUNDS; NIOBIUM IONS; OXIDES; PERMITTIVITY; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TETRAGONAL LATTICES; TITANIUM IONS; TUNGSTEN BRONZE; ALKALINE EARTH METAL COMPOUNDS; ALLOYS; CHALCOGENIDES; CHARGED PARTICLES; COPPER ALLOYS; COPPER BASE ALLOYS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ELECTRICAL PROPERTIES; IONS; MATERIALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; REFRACTORY METAL COMPOUNDS; TEMPERATURE RANGE; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; TUNGSTEN ALLOYS

Citation Formats


                    McCabe, Emma E, and West, Anthony R., E-mail: A.R.West@sheffield.ac.u. New high permittivity tetragonal tungsten bronze dielectrics Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe.  United States: N. p., 2010. 
        Web.  doi:10.1016/j.jssc.2009.11.032.

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                    McCabe, Emma E, & West, Anthony R., E-mail: A.R.West@sheffield.ac.u. New high permittivity tetragonal tungsten bronze dielectrics Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe.  United States.  https://doi.org/10.1016/j.jssc.2009.11.032

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                    McCabe, Emma E, and West, Anthony R., E-mail: A.R.West@sheffield.ac.u. 2010.  
        "New high permittivity tetragonal tungsten bronze dielectrics Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe".  United States.  https://doi.org/10.1016/j.jssc.2009.11.032.

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@article{osti_21372530,

  title        = {New high permittivity tetragonal tungsten bronze dielectrics Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe},

  author       = {McCabe, Emma E and West, Anthony R., E-mail: A.R.West@sheffield.ac.u},

  abstractNote = {The new phases Ba{sub 2}LaMNb{sub 4}O{sub 15}: M=Mn, Fe were prepared by solid state reaction at 1100 deg. C. They have the tetragonal tungsten bronze structure, space group P4/mbm, at room temperature. The two octahedral sites show partial order of M and Nb with preferential occupancy of the smaller B(1) sites by M. Both phases have high permittivities 90+-15 over the range 10-320 K. Ba{sub 2}LaFeNb{sub 4}O{sub 15} is highly insulating with bulk conductivity <<10{sup -8} ohm{sup -1} cm{sup -1} at 25 deg. C and tan delta<<0.001 over the range 100-320 K and at 10{sup 5} Hz. Solid solutions between these new phases and the compositionally and structurally related relaxor ferroelectric Ba{sub 2}LaTi{sub 2}Nb{sub 3}O{sub 15} show gradual loss of ferroelectric behaviour attributed to replacement of polarisable Ti{sup 4+} by a mixture of (Mn, Fe){sup 3+} and Nb{sup 5+}. - Graphical Abstract: Tetragonal tungsten bronze structure of Ba{sub 2}La(Mn, Fe)Nb{sub 4}O{sub 15} from two different viewpoints.},

  doi          = {10.1016/j.jssc.2009.11.032},

  url          = {https://www.osti.gov/biblio/21372530},
  journal      = {Journal of Solid State Chemistry},

  issn         = {0022-4596},

  number       = 3,

  volume       = 183,

  place        = {United States},

  year         = {Mon Mar 15 00:00:00 EDT 2010},

  month        = {Mon Mar 15 00:00:00 EDT 2010}

}

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