Microwave dielectric properties of the (1-x)La(Nb0.9V0.1)O4-xCaMoO4 (0.05 ≤ x ≤ 0.50) scheelite solid solution ceramics

被引：12
作者：
Ma, Zhili [1 ]
Zhao, Jinxiong [2 ]
Zhou, Di [3 ,4 ]
机构：
[1] State Grid Gansu Elect Power Co, Lanzhou 730030, Gansu, Peoples R China
[2] State Grid Gansu Elect Power Res Inst, Lanzhou 730070, Gansu, Peoples R China
[3] Xi An Jiao Tong Univ, Minist Educ, Key Lab, Elect Mat Res Lab, Xian 710049, Shaanxi, Peoples R China
[4] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Sch Elect & Informat Engn, Xian 710049, Shaanxi, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 789卷
基金：
中国国家自然科学基金;
关键词：
Microwave dielectric; LaNbO4; Low temperature co-fired ceramic (LTCC); PROTON CONDUCTION; CRYSTAL-STRUCTURE; CA; SR; BA; TRANSITIONS; EVOLUTION; NIOBATES; OXIDES; PB;
D O I：
10.1016/j.jallcom.2019.03.057
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The CaMoO4 was added into La(Nb0.9V0.1)O-4 ceramics by solid state reaction method to adjust the temperature coefficient of frequency (TCF) values. The series of (1-x)La(Nb0.9V0.1)O-4-xCaMoO(4) (0.05 <= x <= 0.5) ceramics were sintered at 1060-1180 degrees C and found to possess permittivity (epsilon(r)) = 10.38-17.73, Q x f = 31,820-76,570 GHz (Q = 1/dielectric loss, f = resonant frequency lying between 8.5 and 9 GHz), and TCF = -26.3 similar to +160.7 ppm/degrees C. The structures of ceramic samples changed from monoclinic fergusonite to tetragonal scheelite continuously at x = 0.20 along with the shift of TCF values from positive to negative. The best microwave dielectric properties with epsilon(r) = 15.71, Q x f = 76,310 GHz (at 8.825 GHz), and TCF = - 26.3 ppm/degrees C were obtained in 0.8La(Nb0.9V0.1)O4-0.2CaMoO(4) ceramics sintered at 1160 degrees C and these ceramics might be good candidates for microwave devices. (C) 2019 Elsevier B.V. All rights reserved..
引用
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页码：345 / 350
页数：6
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