Synthesis and characterization of lead iron tungstate ceramics obtained by two preparation methods

Zhou, L; Vilarinho, P M; Baptista, J L

doi:10.1016/0025-5408(94)90189-9

Title: Synthesis and characterization of lead iron tungstate ceramics obtained by two preparation methods

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Abstract

Lead iron tungstate (Pb(Fe[sub 2/3]W[sub 1/3])O[sub 3]) is difficult to sinter as a single phase perovskite ceramic. Side reactions lead to undesirable second phases damaging the dielectric properties of the sintered material. Understanding these reaction routes is necessary to eliminate them and to improve on the properties of these ceramics. Lead iron tungstate ceramics were sintered from powders prepared by reaction of mixtures of the three oxides, or by reaction of prereacted iron oxide and tungsten oxide with lead oxide, in an attempt to control the formation of the perovskite phase. The reaction sequences, different in both cases, lead to a higher yield of the perovskite phase when the prereacted powders were used, avoiding therefore the presence of undesirable phases. The microstructures and dielectric properties of the sintered ceramics obtained by both methodologies are reported and compared. The prereacted intermediate phase method leads to a more ordered perovskite structure with better dielectric characteristics.

Authors:

Zhou, L; Vilarinho, P M; Baptista, J L ^[1]

Univ. de Aveiro (Portugal). Dept. de Engenharia Ceramica e do Vidro

Publication Date:: Tue Nov 01 00:00:00 EST 1994

OSTI Identifier:: 6953441

Resource Type:: Journal Article

Journal Name:: Materials Research Bulletin; (United States)

Additional Journal Information:: Journal Volume: 29:11; Journal ID: ISSN 0025-5408

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; IRON TUNGSTATES; DIELECTRIC PROPERTIES; MICROSTRUCTURE; SINTERING; LEAD TUNGSTATES; FERROELECTRIC MATERIALS; IRON OXIDES; LEAD OXIDES; PHASE STUDIES; TUNGSTEN OXIDES; CHALCOGENIDES; ELECTRICAL PROPERTIES; FABRICATION; IRON COMPOUNDS; LEAD COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TUNGSTATES; TUNGSTEN COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360204 - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats


                    Zhou, L, Vilarinho, P M, and Baptista, J L. Synthesis and characterization of lead iron tungstate ceramics obtained by two preparation methods.  United States: N. p., 1994. 
        Web.  doi:10.1016/0025-5408(94)90189-9.

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                    Zhou, L, Vilarinho, P M, & Baptista, J L. Synthesis and characterization of lead iron tungstate ceramics obtained by two preparation methods.  United States.  https://doi.org/10.1016/0025-5408(94)90189-9

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                    Zhou, L, Vilarinho, P M, and Baptista, J L. 1994.  
        "Synthesis and characterization of lead iron tungstate ceramics obtained by two preparation methods".  United States.  https://doi.org/10.1016/0025-5408(94)90189-9.

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@article{osti_6953441,

  title        = {Synthesis and characterization of lead iron tungstate ceramics obtained by two preparation methods},

  author       = {Zhou, L and Vilarinho, P M and Baptista, J L},

  abstractNote = {Lead iron tungstate (Pb(Fe[sub 2/3]W[sub 1/3])O[sub 3]) is difficult to sinter as a single phase perovskite ceramic. Side reactions lead to undesirable second phases damaging the dielectric properties of the sintered material. Understanding these reaction routes is necessary to eliminate them and to improve on the properties of these ceramics. Lead iron tungstate ceramics were sintered from powders prepared by reaction of mixtures of the three oxides, or by reaction of prereacted iron oxide and tungsten oxide with lead oxide, in an attempt to control the formation of the perovskite phase. The reaction sequences, different in both cases, lead to a higher yield of the perovskite phase when the prereacted powders were used, avoiding therefore the presence of undesirable phases. The microstructures and dielectric properties of the sintered ceramics obtained by both methodologies are reported and compared. The prereacted intermediate phase method leads to a more ordered perovskite structure with better dielectric characteristics.},

  doi          = {10.1016/0025-5408(94)90189-9},

  url          = {https://www.osti.gov/biblio/6953441},
  journal      = {Materials Research Bulletin; (United States)},

  issn         = {0025-5408},

  number       = ,

  volume       = 29:11,

  place        = {United States},

  year         = {Tue Nov 01 00:00:00 EST 1994},

  month        = {Tue Nov 01 00:00:00 EST 1994}

}

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