采用溶胶凝胶法制备了掺杂不同量Dy2O3(掺杂摩尔分数分别为:0.001,0.002,0.003,0.005,0.007)的BaTiO3陶瓷,并对其介电性能的变化进行了研究.结果表明:Dy2O3掺杂使BaTiO3陶瓷的电阻率明显降低,当添加量为0.005mol时,电阻率最小,为4.19×108Ω·m.Dy2O3掺杂使BaTiO3陶瓷的介电性能在不同掺杂量和不同频率下发生了明显变化,掺杂量为0.001mol、0.002mol时,BaTiO3陶瓷的介电特性和频率特性得到明显改善,在频率为1000Hz时介电性能相对较好.Dy2O3掺杂使BaTiO3陶瓷的介电温谱有所展宽,且Curie温度有所降低,交流电导随着温度的升高而增大,并在Curie点附近达到最高.
参考文献
| [1] | 张道礼,曹明贺,周东祥,欧阳世翕.微波场中BaTiO3陶瓷的烧结及施、受主掺杂对晶粒生长的影响[J].功能材料,2000(05):528-530. |
| [2] | Huybrechts B.;Takata M.;Ishizaki K. .THE POSITIVE TEMPERATURE COEFFICIENT OF RESISTIVITY IN BARIUM TITANATE [Review][J].Journal of Materials Science,1995(10):2463-2474. |
| [3] | Detlev F.K. Hennings;B. Seriyati Schreinemacher;Herbert Schreinemacher .Solid-State Preparation of BaTiO_3-Based Dielectrics, Using Ultrafine Raw Materials[J].Journal of the American Ceramic Society,2001(12):2777-2782. |
| [4] | Wei J Z;Zhang L Y;Yao X .Melting Properties of Bi2O3-ZnO- Nb2O5-Based Dielectric Ceramics[J].Journal of the American Ceramic Society,1999,82(09):2551. |
| [5] | Chen C Y;Tuan W H .Mechanical and Dielectric Properties of BaTiO3/Ag Composites[J].Journal of Materials Science Letters,1999,18:353. |
| [6] | 郝素娥,韦永德,王进福,韦华.Nd2O3添加量对BaTiO3陶瓷介电性能的影响[J].无机化学学报,2002(10):1042-1044. |
| [7] | 郝素娥,韦永德,韦华.溶胶凝胶法制备Nd2O3改性钛酸钡陶瓷的研究[J].无机化学学报,2002(06):623-626. |
| [8] | Shannigrahi S R;Choudhary R N;Acharya P H .Effects of Pr Doping on Structural and Dielectric Properties of Sol-Gel Prepared PZT(60/40) Ceramics[J].Journal of Materials Science Letters,1999,18:345. |
| [9] | Mazdiyasni K S;Brown LM .Microstructure and Electrical Properties of Sc2O3-doped, Rare-earth Oxide Doped, and Undoped BaTiO3[J].Journal of the American Ceramic Society,1971,54(11):539. |
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