BaBiO_3/SrFe_(0.9)Sn_(0.1)O_(3–δ)厚膜NTCR的电性能研究  

Study on electric properties of BaBiO_3-doped SrFe_(0.9)Sn_(0.1)O_(3–δ)thick film NTC thermistors

作　　者：袁昌来[1] 李擘[1] 巫秀芳[1] 黄静月[1] 刘心宇[1] 

机构地区：[1]桂林电子科技大学广西信息材料重点实验室,广西桂林541004

出　　处：《电子元件与材料》2010年第12期5-7,共3页Electronic Components And Materials

基　　金：国家级大学生创新性实验计划资助项目(No.081059516);广西信息材料重点实验室研究基金资助项目(No.0710908-07-Z)

摘　　要：以SrFe0.9Sn0.1O3–δ为电阻相,BaBiO3为烧结助剂,在氧化铝基板上涂刷成膜,并采用固相法制备了NTC厚膜热敏电阻（NTCR）。借助XRD、SEM、阻温特性测试仪,研究了添加不同量BaBiO3样品的相组成、微观结构以及电性能。结果表明：所得NTC厚膜电阻呈明显的NTC热敏特性,且主要组成物相为钙钛矿结构的SrFe0.9Sn0.1O3–δ;厚膜表面颗粒均匀细小,尺寸在2~3μm范围内;随着BaBiO3含量的增加,其室温电阻R25从初始的4 000 k？降至372 k？,对应的B25/85值从4 378 K逐渐降低为3 113 K。The NTC thick film thermistors based on SrFe0.9Sn0.1O3–δ with different added amount of BaBiO3,were prepared by brushing on alumina substrate and then fabricated by solid-state method.Their phase composition,microstructure and electrical properties were investigated by X-ray diffraction,scanning electron microscope and resistance-temperature character tester.The results indicate that obtained thick film thermistor shows sharp NTC characteristics,and the main phase of them is composed of perovskite-type SrFe0.9Sn0.1O3–δ.The surface of thick film thermistors is homogeneously distributed by small-size grains in the range of 2～3 μm.In addition,with the increase of BaBiO3 content,their value of R25 decreases from initial 4 000 kΩ to 372 kΩ and B25/85 value gradually drops from 4 378 K to 3 113 K.

关 键 词：NTC厚膜热敏电阻 SrFe0.9Sn0.1O3–δ BaBiO3 电性能 

分 类 号：TN37[电子电信—物理电子学]