Microstructure evolution and dielectric properties of K3Li 2Nb5O15 and BaTiO3 composites

Chang Dae Oh; Young Woo Heo; Joon Hyung Lee; Jeong Joo Kim; Sang Hee Cho; Hee Young Lee

doi:10.1080/10584580601085487

Microstructure evolution and dielectric properties of K₃Li ₂Nb₅O₁₅ and BaTiO₃ composites

Chang Dae Oh, Young Woo Heo, Joon Hyung Lee, Jeong Joo Kim, Sang Hee Cho, Hee Young Lee

Research output: Contribution to journal › Article › peer-review

Abstract

Investigations of composite materials with two different crystal structured ferroelectric ceramics were carried out. In this study, phase development, sintering behavior and dielectric characteristics of the composites of tungsten bronze structured ferroelectric K₃Li₂Nb₃O ₁₅ (KLN) and perovskite structured BaTiO₃ (BT) were examined as a function of molar ratio x in (1 - x) K₃Li ₂Nb₅O_15-xBaTiO₃. A wide range of solid solution of BT in KLN was observed and the lattice constants of KLN decreased with BT contents. However, the solubility of KLN in BT was very narrow. X-ray analysis revealed that both KLN and BT phases coexisted in the samples from x = 0.4 to x = 0.8. Therefore, two dielectric relaxation peaks were observed in the samples with x = 0.4-0.8, each of which is originated from KLN and BT phase, respectively. The solid solution between KLN and BT decreased the Tc of both KLN and BT to lower temperature.

Original language	English
Pages (from-to)	77-84
Number of pages	8
Journal	Integrated Ferroelectrics
Volume	87
Issue number	1
DOIs	https://doi.org/10.1080/10584580601085487
State	Published - 2007

Keywords

BaTiO (BT)
Composites
Ferroelectrics
KLiNbO (KLN)
Perovskite structure
Tungsten bronze structure

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10.1080/10584580601085487

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title = "Microstructure evolution and dielectric properties of K3Li 2Nb5O15 and BaTiO3 composites",

abstract = "Investigations of composite materials with two different crystal structured ferroelectric ceramics were carried out. In this study, phase development, sintering behavior and dielectric characteristics of the composites of tungsten bronze structured ferroelectric K3Li2Nb3O 15 (KLN) and perovskite structured BaTiO3 (BT) were examined as a function of molar ratio x in (1 - x) K3Li 2Nb5O15-xBaTiO3. A wide range of solid solution of BT in KLN was observed and the lattice constants of KLN decreased with BT contents. However, the solubility of KLN in BT was very narrow. X-ray analysis revealed that both KLN and BT phases coexisted in the samples from x = 0.4 to x = 0.8. Therefore, two dielectric relaxation peaks were observed in the samples with x = 0.4-0.8, each of which is originated from KLN and BT phase, respectively. The solid solution between KLN and BT decreased the Tc of both KLN and BT to lower temperature.",

keywords = "BaTiO (BT), Composites, Ferroelectrics, KLiNbO (KLN), Perovskite structure, Tungsten bronze structure",

author = "Oh, {Chang Dae} and Heo, {Young Woo} and Lee, {Joon Hyung} and Kim, {Jeong Joo} and Cho, {Sang Hee} and Lee, {Hee Young}",

year = "2007",

doi = "10.1080/10584580601085487",

language = "English",

volume = "87",

pages = "77--84",

journal = "Integrated Ferroelectrics",

issn = "1058-4587",

publisher = "Taylor and Francis Ltd.",

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TY - JOUR

T1 - Microstructure evolution and dielectric properties of K3Li 2Nb5O15 and BaTiO3 composites

AU - Oh, Chang Dae

AU - Heo, Young Woo

AU - Lee, Joon Hyung

AU - Kim, Jeong Joo

AU - Cho, Sang Hee

AU - Lee, Hee Young

PY - 2007

Y1 - 2007

N2 - Investigations of composite materials with two different crystal structured ferroelectric ceramics were carried out. In this study, phase development, sintering behavior and dielectric characteristics of the composites of tungsten bronze structured ferroelectric K3Li2Nb3O 15 (KLN) and perovskite structured BaTiO3 (BT) were examined as a function of molar ratio x in (1 - x) K3Li 2Nb5O15-xBaTiO3. A wide range of solid solution of BT in KLN was observed and the lattice constants of KLN decreased with BT contents. However, the solubility of KLN in BT was very narrow. X-ray analysis revealed that both KLN and BT phases coexisted in the samples from x = 0.4 to x = 0.8. Therefore, two dielectric relaxation peaks were observed in the samples with x = 0.4-0.8, each of which is originated from KLN and BT phase, respectively. The solid solution between KLN and BT decreased the Tc of both KLN and BT to lower temperature.

AB - Investigations of composite materials with two different crystal structured ferroelectric ceramics were carried out. In this study, phase development, sintering behavior and dielectric characteristics of the composites of tungsten bronze structured ferroelectric K3Li2Nb3O 15 (KLN) and perovskite structured BaTiO3 (BT) were examined as a function of molar ratio x in (1 - x) K3Li 2Nb5O15-xBaTiO3. A wide range of solid solution of BT in KLN was observed and the lattice constants of KLN decreased with BT contents. However, the solubility of KLN in BT was very narrow. X-ray analysis revealed that both KLN and BT phases coexisted in the samples from x = 0.4 to x = 0.8. Therefore, two dielectric relaxation peaks were observed in the samples with x = 0.4-0.8, each of which is originated from KLN and BT phase, respectively. The solid solution between KLN and BT decreased the Tc of both KLN and BT to lower temperature.

KW - BaTiO (BT)

KW - Composites

KW - Ferroelectrics

KW - KLiNbO (KLN)

KW - Perovskite structure

KW - Tungsten bronze structure

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U2 - 10.1080/10584580601085487

DO - 10.1080/10584580601085487

M3 - Article

AN - SCOPUS:71149092714

SN - 1058-4587

VL - 87

SP - 77

EP - 84

JO - Integrated Ferroelectrics

JF - Integrated Ferroelectrics

IS - 1

ER -

Microstructure evolution and dielectric properties of K₃Li ₂Nb₅O₁₅ and BaTiO₃ composites

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