Influence of Nb2O5 content on dielectric characteristics of ferroelectric SBN ceramics

Myoung Sup Kim; Shin Il Kang; Joon Hyung Lee; Jeong Joo Kim; Hee Young Lee; Sang Hee Cho

doi:10.1080/713718278

Influence of Nb₂O₅ content on dielectric characteristics of ferroelectric SBN ceramics

Myoung Sup Kim, Shin Il Kang, Joon Hyung Lee, Jeong Joo Kim, Hee Young Lee, Sang Hee Cho

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Abstract

The dielectric characteristics of tungsten bronze structured ferroelectric Sr_0.3Ba_0.7Nb₂O₆ (SBN30) and Sr _0.7Ba_0.3Nb₂O₆ (SBN70) ceramics are analyzed with respect to the content of Nb₂O₅. When excess Nb₂O₅ is added in SBN30 and SBN70, Ba₃Nb ₁₀O₂₈ was produced as a second phase. Because of its low melting temperature, a liquid phase was formed during sintering, which accelerated densification. Whereas in Nb₂O₅ deficient samples, Ba₅Nb₄O₁₅ and Sr₂Nb ₂O₇ phases were produced in SBN30 and SBN70, respectively. When Ba-rieh second phase is produced, it shifts the Sr/Ba ratio of the matrix to Sr-rich, while Sr-rich second phase makes the matrix Ba-rich. The maximum dielectric constant and the Curie temperature variation were discussed based on the formation of the second phases.

Original language	English
Pages (from-to)	245-257
Number of pages	13
Journal	Integrated Ferroelectrics
Volume	47
DOIs	https://doi.org/10.1080/713718278
State	Published - 2002

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title = "Influence of Nb2O5 content on dielectric characteristics of ferroelectric SBN ceramics",

abstract = "The dielectric characteristics of tungsten bronze structured ferroelectric Sr0.3Ba0.7Nb2O6 (SBN30) and Sr 0.7Ba0.3Nb2O6 (SBN70) ceramics are analyzed with respect to the content of Nb2O5. When excess Nb2O5 is added in SBN30 and SBN70, Ba3Nb 10O28 was produced as a second phase. Because of its low melting temperature, a liquid phase was formed during sintering, which accelerated densification. Whereas in Nb2O5 deficient samples, Ba5Nb4O15 and Sr2Nb 2O7 phases were produced in SBN30 and SBN70, respectively. When Ba-rieh second phase is produced, it shifts the Sr/Ba ratio of the matrix to Sr-rich, while Sr-rich second phase makes the matrix Ba-rich. The maximum dielectric constant and the Curie temperature variation were discussed based on the formation of the second phases.",

author = "Kim, {Myoung Sup} and Kang, {Shin Il} and Lee, {Joon Hyung} and Kim, {Jeong Joo} and Lee, {Hee Young} and Cho, {Sang Hee}",

year = "2002",

doi = "10.1080/713718278",

language = "English",

volume = "47",

pages = "245--257",

journal = "Integrated Ferroelectrics",

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publisher = "Taylor and Francis Ltd.",

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TY - JOUR

T1 - Influence of Nb2O5 content on dielectric characteristics of ferroelectric SBN ceramics

AU - Kim, Myoung Sup

AU - Kang, Shin Il

AU - Lee, Joon Hyung

AU - Kim, Jeong Joo

AU - Lee, Hee Young

AU - Cho, Sang Hee

PY - 2002

Y1 - 2002

N2 - The dielectric characteristics of tungsten bronze structured ferroelectric Sr0.3Ba0.7Nb2O6 (SBN30) and Sr 0.7Ba0.3Nb2O6 (SBN70) ceramics are analyzed with respect to the content of Nb2O5. When excess Nb2O5 is added in SBN30 and SBN70, Ba3Nb 10O28 was produced as a second phase. Because of its low melting temperature, a liquid phase was formed during sintering, which accelerated densification. Whereas in Nb2O5 deficient samples, Ba5Nb4O15 and Sr2Nb 2O7 phases were produced in SBN30 and SBN70, respectively. When Ba-rieh second phase is produced, it shifts the Sr/Ba ratio of the matrix to Sr-rich, while Sr-rich second phase makes the matrix Ba-rich. The maximum dielectric constant and the Curie temperature variation were discussed based on the formation of the second phases.

AB - The dielectric characteristics of tungsten bronze structured ferroelectric Sr0.3Ba0.7Nb2O6 (SBN30) and Sr 0.7Ba0.3Nb2O6 (SBN70) ceramics are analyzed with respect to the content of Nb2O5. When excess Nb2O5 is added in SBN30 and SBN70, Ba3Nb 10O28 was produced as a second phase. Because of its low melting temperature, a liquid phase was formed during sintering, which accelerated densification. Whereas in Nb2O5 deficient samples, Ba5Nb4O15 and Sr2Nb 2O7 phases were produced in SBN30 and SBN70, respectively. When Ba-rieh second phase is produced, it shifts the Sr/Ba ratio of the matrix to Sr-rich, while Sr-rich second phase makes the matrix Ba-rich. The maximum dielectric constant and the Curie temperature variation were discussed based on the formation of the second phases.

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U2 - 10.1080/713718278

DO - 10.1080/713718278

M3 - Article

AN - SCOPUS:33749235363

SN - 1058-4587

VL - 47

SP - 245

EP - 257

JO - Integrated Ferroelectrics

JF - Integrated Ferroelectrics

ER -

Influence of Nb₂O₅ content on dielectric characteristics of ferroelectric SBN ceramics

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