Production of Ba(Zn1/3Nb2/3)O3 ceramic by coprecipitation

Pure, nanosized, single phase Ba(Zn1/3Nb2/3)O3 microwave dielectric ceramic powders were prepared by a simple coprecipitation technique. Barium, zinc and niobium ions were precipitated as hydroxides under basic conditions using aqueous sodium hydroxide solution and single phase Ba(Zn1/3Nb2/3)O3 cera...

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Bibliographic Details
Published inMaterials characterization Vol. 63; pp. 63 - 69
Main Authors MERGEN, A, SERT, D
Format Journal Article
LanguageEnglish
Published New York, NY Elsevier 2012
Subjects
Ceramic powders
Ceramics
Coprecipitation
Cross-disciplinary physics: materials science; rheology
Dielectric loss
Exact sciences and technology
High density
Materials science
Nanomaterials
Nanostructure
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Roasting
Solidification
Zinc
Perovskite
Barium zinc niobate
Dielectric materials
Perovskite ceramics
Dielectric properties
Ceramics
Coprecipitation
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Summary:Pure, nanosized, single phase Ba(Zn1/3Nb2/3)O3 microwave dielectric ceramic powders were prepared by a simple coprecipitation technique. Barium, zinc and niobium ions were precipitated as hydroxides under basic conditions using aqueous sodium hydroxide solution and single phase Ba(Zn1/3Nb2/3)O3 ceramic was produced at 800 C. TEM revealed an average particle size of around 100 nm for the calcined powders. The samples sintered at 1250 C for 4 h had a relatively high density and fine grain sizes. The dielectric constant of ceramics varied between 37.5 and 39.8 and the dielectric losses were < 4 x 10 exp(-3) in the frequency range 1 kHz-2 MHz between 20 and 200 C.
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ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2011.08.005