以稀土氧化物Eu2O3为添加剂,采用固相反应法制备了不同掺杂比例(x=0、0.2％、0.5％、1％(质量分数))的CaCu3Ti4O12(CATO)陶瓷样品.采用X射线衍射仪(XRD)和扫描电镜(SEM)对掺杂样品的微观形貌变化进行测量分析；利用一直流高压电源测试样品的J-E非线性特征；利用Anglent4294型精密阻抗分析仪测试样品的电介性能.掺杂后样品的晶格结构并未发生明显的改变,但是平均晶粒尺寸减小,晶界处富Cu相消失；纯CCTO的XRD图谱中出现了富Cu相,掺杂样品的图谱中并未出现上述杂相；Eu2O3掺杂提高了样品内部的肖特基势垒高度,增加了势垒阻挡层的数目,使得样品的压敏电压和非线性系数明显提高,材料的压敏电阻性明显改善,电介-频率稳定性增强.
参考文献
| [1] | Subramanian MA.;Duan N.;Reisner BA.;Sleight AW.;Li D. .High dielectric constant in ACu(3)Ti(4)O(12) and ACu(3)Ti(3)FeO(12) phases[J].International Journal of Quantum Chemistry,2000(2):323-325. |
| [2] | Ramirez AP.;Gardel M.;Blumberg G.;Li D.;Vogt T. Shapiro SM.;Subramanian MA. .Giant dielectric constant response in a copper-titanate[J].Solid State Communications,2000(5):217-220. |
| [3] | Homes C C;Vogt T et al.Optical response of high-dielectric-constant perovskite-related oxide[J].Science,2001,293(5530):673. |
| [4] | Zhao Y L;Pana G W;Ren Q B et al.High dielectric constant in CaCu3 Ti4O12 thin film prepared by pulsed[J].THIN SOLID FILMS,2003,445(01):7. |
| [5] | Sung-Yoon Chung;Il-Doo Kim;Suk-Joong L.Kang .Strong nonlinear current-voltage behaviour in perovskite-derivative calcium copper titanate[J].Nature materials,2004(11):774-778. |
| [6] | V.P.B. Marques;P.R. Bueno;A.Z. Simoes;M. Cilense;J.A. Varela;E. Longo;E.R. Leite .Nature of potential barrier in (Ca_(1/4), Cu_(3/4)) TiO_3 polycrystalline perovskite[J].Solid State Communications,2006(1):1-4. |
| [7] | 徐洋,钟朝位,张树人.CaCu3Ti4O12高介电材料的研究进展[J].材料导报,2007(05):25-28. |
| [8] | Moussa M S;Kennedy B J .Structural studies of the distorted perovskite Ca0,25 Cu0.75 TiO3[J].Materials Research Bulletin,2001,36(13-14):2525. |
| [9] | WANG Jin-Feng,CHEN Hong-cun,ZHANG Xing-Hua,ZHANG De-jun,ZHONG WEI-LIE.Nonlinear Electrical Behaviour of the TiO2.Sb2O3 System[J].中国物理快报(英文版),2000(07):530-531. |
| [10] | Prakash BS;Varma KBR .Effect of sintering conditions on the dielectric properties of CaCu3Ti4O12 and La2/3Cu3Ti4O12 ceramics: A comparative study[J].Physica, B. Condensed Matter,2006(1/2):312-319. |
| [11] | Marques V P B;Ries A;Sim(o)es A Z et al.Evolution of CaCu3Ti4O12 varistor properties during heat treatment in vacuum[J].Ceramics International,2007,33(07):1187. |
| [12] | Pianaro S A;Bueno P R;Olivi P et al.Effect of Bi2C3 addition on SnO2 @ CoO @ Nb2O5 varistor system[J].Journal of Materials Science Letters,1997,16(06):634. |
| [13] | Wang Jinfeng;Chen Hongcun;Su Wenin et al.(Gd,Co,Ta)-doped SnO2 varistor ceramics[J].Journal of Electroceramics,2005,14(02):133. |
| [14] | M.A. Subramanian;A.W. Sleight .ACu_3Ti_4O_(12) and ACu_3Ru_4O_(12) perovskites: high dielectric constants and valence degeneracy[J].Solid state sciences,2002(3):347-351. |
| [15] | 周小莉,杜丕一,韩高荣,翁文剑.不同A位元素（La、Y、Ca）的ACu3Ti4O12陶瓷介电性能研究[J].浙江大学学报（工学版）,2006(08):1446-1449,1476. |
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