MnO2-modified 0.98(K0.5Na0.5)NbO 3-0.02LaFeO3 ceramics with low dielectric loss for high temperature ceramics capacitors applications

Hualei Cheng; Wancheng Zhou; Hongliang Du; Fa Luo; Dongmei Zhu; Boxi Xu

doi:10.1016/j.ceramint.2013.08.095

MnO₂-modified 0.98(K_0.5Na_0.5)NbO ₃-0.02LaFeO₃ ceramics with low dielectric loss for high temperature ceramics capacitors applications

Hualei Cheng, Wancheng Zhou, Hongliang Du, Fa Luo, Dongmei Zhu, Boxi Xu

School of Materials Sience and Engineering

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

8 Scopus citations

Abstract

The MnO₂-doped 0.98(K_0.5Na_0.5)NbO ₃-0.02LaFeO₃ [0.98KNN-0.02LF-x] lead-free ceramics were prepared by the conventional solid-state sintering method. The effects of MnO₂ doping on the phase structure, microstructure, and electrical properties of the ceramics were investigated. The results reveal that MnO ₂ is an excellent sintering aid for the 0.98KNN-0.02LF-x ceramics to improve the densification and decrease the sintering temperature. Additionally, the MnO₂ doping significantly increases the dielectric permittivity and decreases the dielectric loss of the 0.98KNN-0.02LF ceramics. The 0.98KNN-0.02LF-1.5 mol% ceramics show excellent high temperature dielectric properties: the dielectric permittivity ε_r is approximately 2000 and dielectric loss tgδ is smaller than 3% at a broad temperature range from 100 to 400 C.

Original language	English
Pages (from-to)	5019-5023
Number of pages	5
Journal	Ceramics International
Volume	40
Issue number	3
DOIs	https://doi.org/10.1016/j.ceramint.2013.08.095
State	Published - Apr 2014

Keywords

(KNa)NbO
C. Dielectric properties
Microstructure
MnO

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10.1016/j.ceramint.2013.08.095

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title = "MnO2-modified 0.98(K0.5Na0.5)NbO 3-0.02LaFeO3 ceramics with low dielectric loss for high temperature ceramics capacitors applications",

abstract = "The MnO2-doped 0.98(K0.5Na0.5)NbO 3-0.02LaFeO3 [0.98KNN-0.02LF-x] lead-free ceramics were prepared by the conventional solid-state sintering method. The effects of MnO2 doping on the phase structure, microstructure, and electrical properties of the ceramics were investigated. The results reveal that MnO 2 is an excellent sintering aid for the 0.98KNN-0.02LF-x ceramics to improve the densification and decrease the sintering temperature. Additionally, the MnO2 doping significantly increases the dielectric permittivity and decreases the dielectric loss of the 0.98KNN-0.02LF ceramics. The 0.98KNN-0.02LF-1.5 mol% ceramics show excellent high temperature dielectric properties: the dielectric permittivity εr is approximately 2000 and dielectric loss tgδ is smaller than 3% at a broad temperature range from 100 to 400 C.",

keywords = "(KNa)NbO, C. Dielectric properties, Microstructure, MnO",

author = "Hualei Cheng and Wancheng Zhou and Hongliang Du and Fa Luo and Dongmei Zhu and Boxi Xu",

year = "2014",

month = apr,

doi = "10.1016/j.ceramint.2013.08.095",

language = "英语",

volume = "40",

pages = "5019--5023",

journal = "Ceramics International",

issn = "0272-8842",

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TY - JOUR

T1 - MnO2-modified 0.98(K0.5Na0.5)NbO 3-0.02LaFeO3 ceramics with low dielectric loss for high temperature ceramics capacitors applications

AU - Cheng, Hualei

AU - Zhou, Wancheng

AU - Du, Hongliang

AU - Luo, Fa

AU - Zhu, Dongmei

AU - Xu, Boxi

PY - 2014/4

Y1 - 2014/4

N2 - The MnO2-doped 0.98(K0.5Na0.5)NbO 3-0.02LaFeO3 [0.98KNN-0.02LF-x] lead-free ceramics were prepared by the conventional solid-state sintering method. The effects of MnO2 doping on the phase structure, microstructure, and electrical properties of the ceramics were investigated. The results reveal that MnO 2 is an excellent sintering aid for the 0.98KNN-0.02LF-x ceramics to improve the densification and decrease the sintering temperature. Additionally, the MnO2 doping significantly increases the dielectric permittivity and decreases the dielectric loss of the 0.98KNN-0.02LF ceramics. The 0.98KNN-0.02LF-1.5 mol% ceramics show excellent high temperature dielectric properties: the dielectric permittivity εr is approximately 2000 and dielectric loss tgδ is smaller than 3% at a broad temperature range from 100 to 400 C.

AB - The MnO2-doped 0.98(K0.5Na0.5)NbO 3-0.02LaFeO3 [0.98KNN-0.02LF-x] lead-free ceramics were prepared by the conventional solid-state sintering method. The effects of MnO2 doping on the phase structure, microstructure, and electrical properties of the ceramics were investigated. The results reveal that MnO 2 is an excellent sintering aid for the 0.98KNN-0.02LF-x ceramics to improve the densification and decrease the sintering temperature. Additionally, the MnO2 doping significantly increases the dielectric permittivity and decreases the dielectric loss of the 0.98KNN-0.02LF ceramics. The 0.98KNN-0.02LF-1.5 mol% ceramics show excellent high temperature dielectric properties: the dielectric permittivity εr is approximately 2000 and dielectric loss tgδ is smaller than 3% at a broad temperature range from 100 to 400 C.

KW - (KNa)NbO

KW - C. Dielectric properties

KW - Microstructure

KW - MnO

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U2 - 10.1016/j.ceramint.2013.08.095

DO - 10.1016/j.ceramint.2013.08.095

M3 - 文章

AN - SCOPUS:84891372116

SN - 0272-8842

VL - 40

SP - 5019

EP - 5023

JO - Ceramics International

JF - Ceramics International

IS - 3

ER -

MnO₂-modified 0.98(K_0.5Na_0.5)NbO ₃-0.02LaFeO₃ ceramics with low dielectric loss for high temperature ceramics capacitors applications

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Keywords

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