Improved dielectric breakdown strength of Dy doped (Ba0.97Ca0.03)(Ti0.98Mg0.02)O-3 ceramics with nanosized grains
Improved dielectric breakdown strength of Dy doped (Ba0.97Ca0.03)(Ti0.98Mg0.02)O-3 ceramics with nanosized grains
复制标题
纳米晶粒掺镝 (Ba0.97Ca0.03)(Ti0.98Mg0.02)O-3 陶瓷的介电击穿强度提高
DOI：
10.1002/pssa.201700149
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发表时间：
2017
影响因子：
2
通讯作者：
Li Yongxiang
中科院分区：
文献类型：
--
作者：
Yang Zhichao;Gu Yan;Zhang Faqiang;Liu Zhifu;Li Yongxiang
通过固相反应方法合成了具有纳米尺寸颗粒的(Ba0.97−xCa0.03Dyx)(Ti0.98Mg0.02)O3(BCTDM-nano)(x= 0,0.005,0.01,0.02,0.03)陶瓷。研究了Dy3+取代对晶格和电学性能的影响。 X射线衍射和拉曼散射分析表明，Dy3+离子可以调节Ca2+和Mg2+的掺杂位置，影响BaTiO3基体的四方性和缺陷。对于x=≥0.01的样品，最大介电常数增加至2500。在x= 0.01时获得了239 kV cm−1的高介电击穿强度。 Dy 掺杂的电荷补偿产生的高晶界电阻有利于提高介电击穿强度。
The (Ba0.97−xCa0.03Dyx)(Ti0.98Mg0.02)O3(BCTDM‐nano) (x= 0, 0.005, 0.01, 0.02, 0.03) ceramics with nanosized grains were synthesized through a solid‐state reaction method. The influence of Dy3+substitution on the lattice and electrical properties were investigated. The X‐ray diffraction and Raman scattering analyses demonstrate that the Dy3+ions could modulate the doping position of Ca2+and Mg2+and affect the tetragonality and defects in BaTiO3matrix. The maximum dielectric constant was increased up to 2500 for the sample withx= 0.01. A high dielectric breakdown strength of 239 kV cm−1was obtained atx= 0.01. The high grain boundary resistance resulted from a charge compensation by Dy doping benefits the improved dielectric breakdown strength.