| SrBiFeO基NTC陶瓷的制备及其电性能研究 |
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| 引用本文： | 马家峰,刘心宇,石雨,袁昌来. SrBiFeO基NTC陶瓷的制备及其电性能研究[J]. 电子元件与材料, 2010, 29(1). DOI: 10.3969/j.issn.1001-2028.2010.01.005 |
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| 作者姓名： | 马家峰 刘心宇 石雨 袁昌来 |
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| 作者单位： | 桂林电子科技大学,广西信息材料重点实验室,广西,桂林,541004;桂林电子科技大学,广西信息材料重点实验室,广西,桂林,541004;中南大学,材料学院,湖南,长沙,410083 |
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| 基金项目： | 广西研究生教育创新计划资助项目(No.2008105950805M437) |
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| 摘 要： | 以Bi2O3、Fe2O3和SrCO3为主要原料,采用传统固相法制备出具有NTC特性的SrBiFeO(SBF)陶瓷。研究了该陶瓷的物相结构、断面形貌及电性能。结果表明:试样由BiFeO3、SrFeO3-x和三方晶系的Sr2.25Bi6.75O12.38相组成,试样的室温电阻率ρ25随Fe2O3掺杂量的增加呈现先减小后增大的趋势,而B25/85值却呈现单调递增趋势,陶瓷试样SBF30即:n(Bi2O3):n(SrCO3):n(Fe2O3)=50:70:15时具有较好的NTC特性,ρ25为1.192×103Ω.cm,B25/85值为3 604 K。
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| 关 键 词： | BiFeO_3 SrFeO_(3-x) Sr_(2.25)Bi_(6.75)O_(12.38) NTC效应 |
Research on the preparation and electrical properties of SrBiFeO based NTC ceramics |
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| MA Jiafeng,LIU Xinyu,SHI Yu,YUAN Changlai. Research on the preparation and electrical properties of SrBiFeO based NTC ceramics[J]. Electronic Components & Materials, 2010, 29(1). DOI: 10.3969/j.issn.1001-2028.2010.01.005 |
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| Authors: | MA Jiafeng LIU Xinyu SHI Yu YUAN Changlai |
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| Affiliation: | 1.Guangxi Key Laboratory of Information Material;Guilin University of Electronic Technology;Guilin 541004;Guangxi Zhuangzu Zizhiqu;China;2.College of Material;Central South University;Changsha 410083;China |
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| Abstract: | Using Bi_2O_3,Fe_2O_3 and SrCO_3 as main raw materials,SrBiFeO (SBF) ceramics with NTC characteristics were prepared by the conventional solid state method.The phase structure,cross-sectional morphologies and electrical properties of the ceramics were all investigated.The results show that the sample phase composition consists of BiFeO_3,SrFeO_(3-x) and trigonal system of Sr_(2.25)Bi_(6.75)O_(12.38).And with the increase of Fe_2O_3-doping amount,the resistivity ρ_(25) of the sample first decreases,and then increases again,but B_(25/85) value of the sample monotonously increases.The ceramic sample SBF30 i.e.n(Bi_2O_3) :n(SrCO_3) :n(Fe_2O_3) = 50:70:15 with good NTC characteristics is obtained and its ρ_(25) is 1.192×10~3 Ω·cm and B_(25/85) value is 3 604 K. |
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| Keywords: | BiFeO3 SrFeO3-x Sr2.25Bi6.75O12.38 NTC effect |
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