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Remarkably enhanced dielectric stability and energy storage properties in BNT–BST relaxor ceramics by A-site defect engineering for pulsed power applications

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Journal of Advanced ceramics 2022年第2期11卷 283-294页

作者： Zhipeng LI Dong-Xu LI Zong-Yang SHEN Xiaojun ZENG Fusheng SONG Wenqin LUO Xingcai WANG Zhumei WANG Yueming LI Energy Storage and Conversion ceramic Materials Engineering Laboratory of Jiangxi Province China National Light Industry Key Laboratory of Functional Ceramic MaterialsSchool of Materials Science and EngineeringJingdezhen Ceramic UniversityJingdezhen 333403China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Chengdu Hongke Electronic Technology Co. Ltd.Chengdu 610000China

Lead-free bulk ceramics for advanced pulsed power capacitors show relatively low recoverable energy storage density(Wrec)especially at low electric field condition.To address this challenge,we propose an A-site defect engineering to optimize the electric polarization behavior by disrupting the orderly arrangement of A-site ions,in which Ba_(0.105)Na_(0.325)Sr_(0.245−1.5x)□_(0.5x)Bi_(0.325)+xTiO_(3)(BNS_(0.245−1.5x)□_(0.5x)B_(0.325+x)T,x=0,0.02,0.04,0.06,and 0.08)lead-free ceramics are selected as the representative.The BNS_(0.245−1.5x)□_(0.5x)B_(0.325+x)T ceramics are prepared by using pressureless solid-state sintering and achieve large W_(rec)(1.8 J/cm^(3))at a low electric field(@110 kV/cm)when x=0.06.The value of 1.8 J/cm3 is super high as compared to all other W_(rec) in lead-free bulk ceramics under a relatively low electric field(ceramics.The excellent performances can be attributed to the A-site defect engineering,which can reduce remnant polarization(P_(r))and improve the thermal evolution of polar nanoregions(PNRs).This work confirms that the BNS_(0.245−1.5x)□_(0.5x)B_(0.325+x)T(x=0.06)ceramics are desirable for advanced pulsed power capacitors,and will push the development of a series of Bi0.5Na0.5TiO3(BNT)-based ceramics with high W_(rec) and high-temperature stability.

关键词： relaxor ferroelectrics energy storage ceramics ceramic capacitor Bi_(0.5)Na_(0.5)TiO_(3)(BNT) defect engine

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Influence of Composition on Properties of Medium Temperature Sintering (Ba,Sr)TiO_3 Series capacitor ceramics

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Journal of Rare Earths 2006年第6期24卷 777-781页

作者：黄新友赵晨陈志刚高春华 School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

The influence of the composition （Yb2O3, MgO, CeO2, Li2CO3） on the dielectric properties of medium temperature sintering （Ba, Sr）TiO3 （BST） series capacitor ceramics was investigated by means of conventional technology process and orthogonal design experiments. The major secondary influencing factors and the influencing tendency of various factor＇s levels for the dielectric properties of BST ceramics were obtained. The optimum formula for maximum dielectric constant （ε） and for minimum dielectric loss （tanδ） was obtained under the experimental conditions. The BST ceramics with optimum comprehensive properties was obtained by means of orthogonal design experiments, with the sintering temperature at 1200 ℃, the dielectric constant 5239, the dielectric loss 0.0097, withstand electric voltage over 6 MV·m^-1, capacitance temperature changing ence of various components on the providing the basis for preparation rate （△C/C） - 75.67%, and suited for Y5V character. The mechanism of the infludielectric properties of medium temperature sintering BST ceramics was studied, thus of multilayer capacitor ceramics and single-chip capacitor ceramics.

关键词： medium temperature sintering Yb2O3 ceramic capacitor barium and strontium titanate ceramics rare earths

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Glass modified barium strontium titanate ceramics for energy storage capacitor at elevated temperatures

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Journal of Materiomics 2019年第4期5卷 641-648页

作者： Zong-Yang Shen Yu Wang Yanxue Tang Yuanying Yu Wen-Qin Luo Xingcai Wang Yueming Li Zhumei Wang Fusheng Song Energy Storage and Conversion ceramic Materials Engineering Laboratory of Jiangxi Province China National Light Industry Key Laboratory of Functional Ceramic MaterialsSchool of Materials Science and EngineeringJingdezhen Ceramic InstituteJingdezhen333403China Key Laboratory of Optoelectronic Material and Device Shanghai Normal UniversityShanghai200234China Chengdu Hongming UESTC Electronic New Materials Co. Ltd.Chengdu610100China

A glass with composition of B_(2)O_(3)-Bi_(2)O_(3)-SiO_(2)-CaO-BaO-Al_(2)O_(3)-ZrO_(2)(BBSZ)modified Ba_(x)Sr_(1-x)TiO_(3)(BST,x=0.3 and 0.4)ceramics were prepared by a conventional solid state reaction method abided by a formula of BST+y%BBSZ(y=0,2,4,7,and 10,in mass).The effect of BBSZ glass content on the structure,dielectric properties and energy storage characteristics of the ceramics was investigated.The dielectric constant reduced but the endurable electrical strength enhanced due to the BBSZ glass addition in BST ceramics.In particular,the dielectric loss of the ceramics at elevated temperature(e.g.200℃)can be strongly suppressed from tanδ>20%to tanδceramics,an optimized energy storage density(γ=0.63 J/cm^(3))and efficiency(η=91.6%)under an applied electric field of 160 kV/cm was obtained at room temperature.Meanwhile,the temperature dependent polarization-electric field(P-E)hysteresis loops were measured to evaluate the energy storage characteristics of the ceramics potential for high voltage capacitor application at elevated temperatures.

关键词： Barium strontium titanate Glass modification Energy storage ceramic capacitor

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Dielectric Properties and Structure of Yb_2O_3-Doped (Ba,Sr)TiO_3 ceramics

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Journal of Rare Earths 2007年第S1期25卷 515-518页

作者：黄新友陈志刚高春华赵晨 School of Materials Science and Engineering Jiangsu University

The effect of Yb2O3 doping amount on the dielectric properties of (Ba, Sr)TiO3 (BST) series capacitor ceramics prepared using solid state reaction method were studied. With the increasing of Yb2O3 doping amount, the dielectric constant(ε) of materials increased, the dielectric loss(tanδ) of materials decreased to minimum when w(Yb2O3) was 0.9%. The BST ceramics with high ε(10000), low tanδ(0.0213) and high DC breakdown voltage(7.2 kV·mm-1) were obtained. The influence of Yb2O3 doping amount on the structure of BST ceramics was studied by means of X-ray diffraction(XRD) and scanning electron microscope. The influencing mechanism of Yb2O3 on the dielectric properties of BST ceramics was studied. The results showed that Yb2O3 doping influenced the properties and structure of BST ceramics by means of forming defect solid solution, but did not influence crystal grain size,the crystal phase was single perovskite structure, did not influence XRD data of BST and did not improve capacitance temperature property greatly, but increase dielectric constant greatly. These results provided the basis for Yb2O3-doped BST series capacitor ceramics.

关键词： ytterbium trioxide ceramic capacitor barium and strontium titanate rare earths

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Dielectric Properties of Dy2O3-Doped （Ba,Sr）TiO3 ceramics

Dielectric Properties of Dy2O3-Doped （Ba,Sr）TiO3 Ceramics

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2004 International Conference on Rare Earth ceramics and Glass

作者：黄新友高春华陈祥冲郑夏莲黄国军刘会平 School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

＜正＞ 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.

关键词： dysprosium trioxide ceramic capacitor barium and strontium titanate rare earths

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