Crystal structure, infrared spectra and microwave dielectric properties of ultra low-loss Li2Mg4TiO7 ceramics

被引：52

作者：

Bi, J. X. ^{[1
]}

Li, C. C. ^{[1
]}

Zhang, Y. H. ^{[1
]}

Xing, C. F. ^{[1
]}

Yang, C. H. ^{[1
]}

Wu, H. T. ^{[1
]}

机构：

[1] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China

来源：

MATERIALS LETTERS | 2017年 / 196卷

关键词：

Li2Mg4TiO7; Electroceramics; Microwave dielectric properties; FTIR; SINTERING BEHAVIOR; OXIDES;

D O I：

10.1016/j.matlet.2017.03.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low-loss Li2Mg4TiO7 dielectric ceramics were prepared by the conventional solid-state method. The relationship among sintering behavior, phase composition, microstructure and dielectric properties of Li2Mg4TiO7 ceramics was investigated. All the sintered samples exhibited the single phase with rock-salt structure belonging to Fm-3m space group. The higher Q.f values of samples above 1500 degrees C were depending on crystal structure and phase composition. IR reflectivity spectrum indicated that the dielectric constant of Li2Mg4TiO7 was mainly affected by the polar optical phonons. Typically, the ceramics sintered at 1600 degrees C exhibited excellent microwave dielectric properties with epsilon(r) = 13.43, Q.f = 233,600 GHz and tau(f) = -7.24 ppm/degrees C. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：128 / 131

页数：4

共 20 条

[1] New high Q microwave dielectric ceramics with rock salt structures: (1-x)Li2TiO3 + xMgO system (0 ≤ x ≤ 0.5)
Bian, J. J.
Dong, Y. F.
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2010, 30 (02) : 325 - 330
[2] ORDER-DISORDER PHENOMENA IN OXIDES WITH ROCK SALT STRUCTURES - SYSTEM LI2TIO3-MGO
CASTELLANOS, M
WEST, AR
[J]. JOURNAL OF MATERIALS SCIENCE, 1979, 14 (02) : 450 - 454
[3] ANALYSIS AND EVALUATION OF A METHOD OF MEASURING COMPLEX PERMITTIVITY AND PERMEABILITY OF MICROWAVE INSULATORS
COURTNEY, WE
[J]. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1970, MT18 (08) : 476 - &
[4] Novel series of ultra-low loss microwave dielectric ceramics: Li2Mg3BO6 (B = Ti, Sn, Zr)
Fu, Zhifen
Liu, Peng
Ma, Jianli
Zhao, Xiaogang
Zhang, Huaiwu
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2016, 36 (03) : 625 - 629
[5] Synthesis and Microwave Dielectric Properties of Novel Temperature Stable High Q, Li2ATi3O8 (A=Mg, Zn) Ceramics
George, Sumesh
Sebastian, Mailadil Thomas
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2010, 93 (08) : 2164 - 2166
[6] Hakki BW., 1960, IEEE. Trans. MTT, DOI DOI 10.1109/TMTT.1960.1124749
[7] NISHIGAKI S, 1987, AM CERAM SOC BULL, V66, P1405
[8] Characterization on low loss dielectric Li2MgTiO4 ceramics based on chemical bond theory at microwave frequency
Pan, H. L.
Xing, C. F.
Jiang, X. S.
Wu, H. T.
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 688 : 416 - 421
[9] Low temperature sintering and microwave dielectric properties of Li2MgTiO4-based temperature stable ceramics
Pei, Cuijin
Yao, Guoguang
Liu, Peng
Zhou, Jianping
[J]. MATERIALS LETTERS, 2016, 184 : 57 - 59
[10] Submillimetre and infrared response of microwave materials: extrapolation to microwave properties
Petzelt, J
Kamba, S
[J]. MATERIALS CHEMISTRY AND PHYSICS, 2003, 79 (2-3) : 175 - 180

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