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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number = "3",

}

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

UR - https://www.scopus.com/pages/publications/84891372116

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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