采用固相反应法制备了(1-χ)BaTO3-χBi0.5K0.5TiO33(BT-BKT,χ=0,0.1和0.2),对陶瓷样品进行X射线衍射、扫描电镜、介电常数-温度及电阻率-温度测试分析,研究了掺杂BKT对该系统陶瓷相组成、显微结构和电性能的影响.结果表明:BaTi3,陶瓷的晶格参数c轴值随着BKT含量的增加基本不变,而a轴值有所减小.BT-BKT陶瓷的居里温度(Tc)随着BKT的加入向高温移动,当χ=0.1和0.2时,Tc分别提高至170℃和185℃左右;但室温电阻率随着BKT含量的增加明显增大.
参考文献
| [1] | Heywang W .Resistivity Anomaly in Doped Barium Titanate[J].Journal of the American Ceramic Society,1964,47(10):484-490. |
| [2] | Jonker G H .Some Aspects of Semiconducting Barium Titanate[J].Solid-State Electronics,1964,7:895-903. |
| [3] | Takeda H;Aoto W;Shiosaki T .BaTiO3-(Bi1/2Na1/2)TiO3 Solid-solution Semicondueting Ceramics with Tc130℃[J].Applied Physics Letters,2005,87(10):102104. |
| [4] | 韦继锋;蒲永平;毛玉琴 .Nb掺杂BaTiO3-Bi0.5K0 5TiO3陶瓷系统PTCR性能的研究[J].人工晶体学报,2010,39(增刊):145-148. |
| [5] | 蒲永平,王瑾菲,赵新,杨公安,陈小龙,吴胜红.高居里点（1-x）Ba_（0.998）La_（0.002）TiO_3+xBi_4Ti_3O_（12）系统陶瓷微观结构及温度特性的研究[J].人工晶体学报,2009(05):1119-1122. |
| [6] | Huo WR;Qu YF .Effects of Bi1/2Na1/2TiO3 on the Curie temperature and the PTC effects of BaTiO3-based positive temperature coefficient ceramics[J].Sensors and Actuators, A. Physical,2006(2):265-269. |
| [7] | Senlin Leng;Guorong Li;Liaoying Zheng .Synthesis of Y-Doped BaTiO_3-(Bi_(1/2)K_(1/2))TiO_3 Lead-Free Positive Temperature Coefficient of Resistivity Ceramics and Their PTC Effects[J].Journal of the American Ceramic Society,2009(11):2772-2775. |
| [8] | T. Shimada;K. Touji;Y. Katsuyama .Lead free PTCR ceramics and its electrical properties[J].Journal of the European Ceramic Society,2007(13/15):3877-3882. |
| [9] | Wei J F;Pu Y P;Mao Y Q et al.Effect of the Reoxidafion on Positive Temperature Coefficient Behavior of BaTiO3-Bi0.5Na0 5TiO3[J].Journal of the American Ceramic Society,2010,93(06):1527-1529. |
| [10] | Ho I C;Fu S L .Effect of Reoxidation on the Grain-boundary Acceptor-sate Density of Reduced BaTiO3 Ceramics[J].Journal of the American Ceramic Society,1992,75(03):728-730. |
| [11] | 郝俊杰,李龙土,王晓慧,桂治轮.无铅压电陶瓷材料研究现状[J].硅酸盐学报,2004(02):189-195. |
| [12] | Takeda H;Shimada T;Katsuyama Y et al.Fabrication and Operation Limit of Lead-free PTCR Ceramics Using BaTiO3-(Bi1/2 Na1/2)TiO3System[J].Journal of Electroceramics,2009,22(1-3):263-269. |
| [13] | Chiang Y M;Takagi T .Comment on "Interfacial Segregation in Perovskitos:I-IV"[J].Ceramic Society,1992,75(07):2017-2019. |
| [14] | Ping-Hua Xiang;Hiroaki Takeda;Tadashi Shiosaki .High T_(c) lead-free BaTiO_(3)-(Bi_(1/2)Na_(1/2))TiO_(3) positive temperature coefficient of resistivity ceramics with electrically heterogeneous structure[J].Applied physics letters,2007(16):162904-1-162904-3-0. |
| [15] | Hans Theo Langhammer;Darko Makovec;Yongping Pu .Grain boundary reoxidation of donor-doped barium titanate ceramics[J].Journal of the European Ceramic Society,2006(14):2899-2907. |
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