系统研究了不同半径的稀土离子La3+、Ho3+、Yb3+分别掺杂的BaTiO3陶瓷的相组成、显微结构与介电性能的关系.实验表明,随着稀土离子La3+、Ho3+、Yb3+半径递减,稀土在BaTiO3中的固溶度降低,当稀土掺杂量超出固溶度时,BaTiO3陶瓷中生成焦绿石相.小离子半径的Yb3+掺杂有利于提高居里温度,改善容量温度特性,使瓷料满足EIA X8R规范要求.SEM研究表明,焦绿石第二相会抑制陶瓷晶粒生长,形成稳定的壳-芯结构,从而获得高介电常数和平缓的电容量温度曲线.
参考文献
| [1] | Satoh M;Tanaka H .High dielectric-constant dielectric ceramic composition,and its fabrication process[P].US 5990029,1999. |
| [2] | Jung Y S;Na E S;Paik U et al.Study on the phase transition and characteristics of rare earth elements doped BaTiO3[J].Materials Research Bulletin,2002,37:1633. |
| [3] | Sato S;Terada Y;Fujikawa Y .Manufacture method of dielectric ceramic composition[P].US 6544916,2003. |
| [4] | Young Hoon Song;Young Ho Han .Effects of Rare-Earth Oxides on Temperature Stability of Acceptor-Doped BaTiO_3[J].Japanese journal of applied physics,2005(8):6143-6147. |
| [5] | Kishi H;Okino Y;Honda M .The effect of MgO and rareearth oxide on formation behavior of core-shell structure in BaTiO3[J].Japanese Journal of Applied Physics,1997,36(09):5954. |
| [6] | Hwang JH.;Han YH.;Choi SK. .Dielectric properties of BaTiO3 codoped with Er2O3 and MgO[J].Japanese journal of applied physics,2001(8):4952-4955. |
| [7] | Kishi H;Kohzu N;Iguchi Y .Study of occupational sites and dielectric properties of Ho-Mg and Ho-Mn substituted BaTiO3[J].Japanese Journal of Applied Physics,2000,39(09):5533. |
| [8] | Tsur Y.;Scrymgeour I.;Randall CA.;Hitomi A. .Site occupancy of rare-earth cations in BaTiO3[J].Japanese journal of applied physics,2001(1):255-258. |
| [9] | Mizuno Y.;Kohzu N.;Chazono H.;Kishi H.;Okino Y. .Influence of the microstructure evolution on electrical properties of multilayer capacitor with Ni electrode[J].Japanese journal of applied physics,1998(9B):5227-5231. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%