Dielectric properties and relaxor behavior of La-doped Ba0.5Sr0.5TiO3 ceramics sintered in nitrogen atmosphere

被引：3

作者：

Ding, Quan ^{[1
]}

Hao, Hua ^{[1
,2
]}

Wang, Fang ^{[1
]}

Li, Kangchuang ^{[1
]}

Yao, Zhonghua ^{[1
]}

Cao, Minghe ^{[1
]}

Liu, Hanxing ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Int Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Foshan Xianhu Lab Adv Energy Sci & Technol Guangdo, Foshan 528200, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2023年 / 34卷 / 18期

关键词：

PINNED DEFECT-DIPOLES; COLOSSAL PERMITTIVITY; SRTIO3; CERAMICS; GIANT PERMITTIVITY; RELAXATION; CHEMISTRY; GD; LI;

D O I：

10.1007/s10854-023-10733-y

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Ba(0.5-1.5x)Sr0.5LaxTiO3(x = 0.005,0.01,0.015,0.02) ceramics were manufactured in N-2 atmosphere by solid state reaction method. All ceramic samples present a cubic perovskite phase. The relative dielectric constant of the sample can reach 115,648 at 1000 Hz and 25 & DEG;C when x = 0.01, with a dielectric loss of less than 0.04 and a relatively high dielectric temperature stability in a region of 25-250 & DEG;C. The same sample experiences a decline in dielectric constant when it is annealed in air. In addition, there is an increase in its dielectric loss, with two sets of dielectric loss peaks. According to the systematic analysis, both the thermal motion of the oxygen vacancy and its defective dipole are responsible for the relaxation behavior. This may serve as a reference for the future study of the dielectric properties of modified materials.

引用

页数：9

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