Effect of Nb2O5 content on dielectric characteristics of tungsten-bronze-structured KLN ceramics

Shu Lun Xu; Joon Hyung Lee; Jeong Joo Kim; Hee Young Lee; Sang Hee Cho

doi:10.1016/S0921-5107(02)00488-9

Effect of Nb₂O₅ content on dielectric characteristics of tungsten-bronze-structured KLN ceramics

Shu Lun Xu, Joon Hyung Lee, Jeong Joo Kim, Hee Young Lee, Sang Hee Cho

Research output: Contribution to journal › Conference article › peer-review

11 Scopus citations

Abstract

The effect of excess Nb₂O₅ on the dielectric characteristics of tungsten-bronze-structured polycrystalline K₃Li₂Nb₅O₁₅ (KLN) ceramics was studied. During sintering, the evaporation of K and Li was inevitable, which caused an effective increase of Nb content in the crystal. Even though the initial composition was below the boundary, where the crystal structure of KLN changed from tetragonal to orthorhombic, the composition passed over the boundary due to evaporation. The composition shift took away the dielectric relaxation near the phase transformation temperature. Ti addition was effective in suppressing the evaporation of K and Li and revived the phase transformation. The evaporation of cations was explained from the viewpoint of lattice stability.

Original language	English
Pages (from-to)	483-486
Number of pages	4
Journal	Materials Science and Engineering: B
Volume	99
Issue number	1-3
DOIs	https://doi.org/10.1016/S0921-5107(02)00488-9
State	Published - 25 May 2003
Event	Advanced Electronic-ceramic Materials. Proceedings of the 8th IUMRS-ICEM 2002 - Xi'an, China Duration: 10 Jun 2002 → 14 Jun 2002

Keywords

Permittivity
Phase transitions
Thermal evaporation
Tungsten bronzes

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10.1016/S0921-5107(02)00488-9

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title = "Effect of Nb2O5 content on dielectric characteristics of tungsten-bronze-structured KLN ceramics",

abstract = "The effect of excess Nb2O5 on the dielectric characteristics of tungsten-bronze-structured polycrystalline K3Li2Nb5O15 (KLN) ceramics was studied. During sintering, the evaporation of K and Li was inevitable, which caused an effective increase of Nb content in the crystal. Even though the initial composition was below the boundary, where the crystal structure of KLN changed from tetragonal to orthorhombic, the composition passed over the boundary due to evaporation. The composition shift took away the dielectric relaxation near the phase transformation temperature. Ti addition was effective in suppressing the evaporation of K and Li and revived the phase transformation. The evaporation of cations was explained from the viewpoint of lattice stability.",

keywords = "Permittivity, Phase transitions, Thermal evaporation, Tungsten bronzes",

author = "Xu, {Shu Lun} and Lee, {Joon Hyung} and Kim, {Jeong Joo} and Lee, {Hee Young} and Cho, {Sang Hee}",

year = "2003",

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doi = "10.1016/S0921-5107(02)00488-9",

language = "English",

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journal = "Materials Science and Engineering: B",

issn = "0921-5107",

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number = "1-3",

note = "Advanced Electronic-ceramic Materials. Proceedings of the 8th IUMRS-ICEM 2002 ; Conference date: 10-06-2002 Through 14-06-2002",

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TY - JOUR

T1 - Effect of Nb2O5 content on dielectric characteristics of tungsten-bronze-structured KLN ceramics

AU - Xu, Shu Lun

AU - Lee, Joon Hyung

AU - Kim, Jeong Joo

AU - Lee, Hee Young

AU - Cho, Sang Hee

PY - 2003/5/25

Y1 - 2003/5/25

N2 - The effect of excess Nb2O5 on the dielectric characteristics of tungsten-bronze-structured polycrystalline K3Li2Nb5O15 (KLN) ceramics was studied. During sintering, the evaporation of K and Li was inevitable, which caused an effective increase of Nb content in the crystal. Even though the initial composition was below the boundary, where the crystal structure of KLN changed from tetragonal to orthorhombic, the composition passed over the boundary due to evaporation. The composition shift took away the dielectric relaxation near the phase transformation temperature. Ti addition was effective in suppressing the evaporation of K and Li and revived the phase transformation. The evaporation of cations was explained from the viewpoint of lattice stability.

AB - The effect of excess Nb2O5 on the dielectric characteristics of tungsten-bronze-structured polycrystalline K3Li2Nb5O15 (KLN) ceramics was studied. During sintering, the evaporation of K and Li was inevitable, which caused an effective increase of Nb content in the crystal. Even though the initial composition was below the boundary, where the crystal structure of KLN changed from tetragonal to orthorhombic, the composition passed over the boundary due to evaporation. The composition shift took away the dielectric relaxation near the phase transformation temperature. Ti addition was effective in suppressing the evaporation of K and Li and revived the phase transformation. The evaporation of cations was explained from the viewpoint of lattice stability.

KW - Permittivity

KW - Phase transitions

KW - Thermal evaporation

KW - Tungsten bronzes

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U2 - 10.1016/S0921-5107(02)00488-9

DO - 10.1016/S0921-5107(02)00488-9

M3 - Conference article

AN - SCOPUS:0038348684

SN - 0921-5107

VL - 99

SP - 483

EP - 486

JO - Materials Science and Engineering: B

JF - Materials Science and Engineering: B

IS - 1-3

T2 - Advanced Electronic-ceramic Materials. Proceedings of the 8th IUMRS-ICEM 2002

Y2 - 10 June 2002 through 14 June 2002

ER -

Effect of Nb₂O₅ content on dielectric characteristics of tungsten-bronze-structured KLN ceramics

Abstract

Keywords

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