Dielectric Properties of Dy2O3 -Doped ( Ba, Sr) TiO3 Ceramics
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第3期
论文作者：LIU Huiping Huang Guojun Zheng Xialian HUANG Xinyou GAO Chunhua Chen Xiangchong
Key words：dysprosium trioxide; ceramic capacitor; barium and strontium titanate; rare earths;
Abstract: The effects of Dy2O3 doping on the dielectric properties of (Ba, Sr)TiO3 series capacitor ceramics prepared using solid-state reaction method were studied. With the increasing of Dy2O3 additive , the dielectric constant (ε) of materials increases to a maximum when w(Dy2O3 ) is about 0.5% ,while the dielectric loss(tanδ) decreases. The BST ceramics with highε ( = 5245 ), low tanδ ( = 0. 0026 ) and high DC breakdown voltage ( = 5.5 mV ·m-1 ) were obtained. The influencing mechanism of Dy2O3 on the dielectric properties of (Ba, Sr)TiO3 ceramics was studied, thus providing the basis for preparation of capacitor ceramics.
LIU Huiping1，Huang Guojun1，Zheng Xialian1，HUANG Xinyou1，GAO Chunhua1，Chen Xiangchong1
(1.School of Materials Science and Engineering ,Jiangsu University,Zhenjiang 212013, China)
Abstract:The effects of Dy2O3 doping on the dielectric properties of (Ba, Sr)TiO3 series capacitor ceramics prepared using solid-state reaction method were studied. With the increasing of Dy2O3 additive , the dielectric constant (ε) of materials increases to a maximum when w(Dy2O3 ) is about 0.5% ,while the dielectric loss(tanδ) decreases. The BST ceramics with highε ( = 5245 ), low tanδ ( = 0. 0026 ) and high DC breakdown voltage ( = 5.5 mV ·m-1 ) were obtained. The influencing mechanism of Dy2O3 on the dielectric properties of (Ba, Sr)TiO3 ceramics was studied, thus providing the basis for preparation of capacitor ceramics.
Key words:dysprosium trioxide; ceramic capacitor; barium and strontium titanate; rare earths;
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