A temperature stable (Ba1-xCex)(Ti1-x/2Mgx/2)O3 lead-free ceramic for X4D capacitors

被引：13
作者：
Han, Dandan [1 ,2 ]
Wang, Changhao [2 ]
Lu, Dayong [2 ]
Hussain, Fayaz [3 ]
Wang, Dawei [4 ]
Meng, Fanling [1 ]
机构：
[1] Jilin Univ, Key Lab Automobile Mat, Minist Educ, Coll Mat Sci & Engn, Changchun 130012, Peoples R China
[2] Jilin Inst Chem Technol, Key Lab Special Funct Mat Jilin Prov Univ, Jilin 132022, Jilin, Peoples R China
[3] NED Univ Engn & Technol, Dept Mat Engn, Main Univ Rd, Karachi 75270, Pakistan
[4] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 821卷
关键词：
BaTiO3; Dielectric property; Capacitors; X4D; Vacancies; DIFFUSE PHASE-TRANSITION; DOPED BARIUM-TITANATE; DIELECTRIC-PROPERTIES; BATIO3; CERAMICS; BEHAVIOR; MICROSTRUCTURE; SUBSTITUTION; PERFORMANCE; DEFECTS; SITE;
D O I：
10.1016/j.jallcom.2019.153480
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：
A novel dielectric ceramic {(Ba1-xCex)(Ti1-x/2Mgx/2)O-3, x = 0.06, BCTM6} with excellent temperature stability (-55 to 65 degrees C, TCC <= +/- 3.3%, epsilon(RT)' similar to 2242, tan delta < 0.023) was developed for X4D capacitors. Phase structure was found to transfer from tetragonal to cubic phase with increasing x and the solubility limitation of Ce/Mg was determined to be 0.10 by X-ray diffraction (XRD) for ((Ba1-xCex)(Ti1-x/2Mgx/2)O-3. The formation of 2Ce(Ba)center dot - Mg-Ti" dipoles was believed to be responsible for the elimination of oxygen vacancies, leading to the low dielectric loss of BCTM6. An electron paramagnetic resonance (EPR) signal at g similar to 1.98 suggested the ionization of Ba vacancies in (Ba1-xCex)(Ti1-x/2Mgx/2)O-3(BMTC), indicative of the amphoteric behavior of Mg2+. (C) 2019 Elsevier B.V. All rights reserved.
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页数：6
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