采用气相法对 PbTiO3陶瓷扩渗 Gd元素,经扫描电镜和 X射线能谱分析,证实 Gd元素已渗入到 PbTiO3陶瓷中,并使 PbTiO3陶瓷的导电性能和介电性能发生了十分显著的变化.经Gd扩渗,PbTiO3陶瓷的室温电阻率从 2.0× 1010Ω@ m下降为 0.25Ω@ m,已趋近导体.随着温度升高,晶粒电阻和晶界电阻逐渐降低,导电性更强. Gd扩渗使 PbTiO3陶瓷的介电常数较纯PbTiO3陶瓷明显增大.
参考文献
| [1] | Cohen E .Origin of Ferroelectricity in Perovskite Oxides[J].Nature,1992,358(09):136-138. |
| [2] | Ping Sun;Chao-Nan Xu;Morito Akiyama;Tadahiko Watanabe .Controlled oxygen partial pressure sintering of (Pb,La)(Zr,Ti)O{sub}3 ceramics[J].Journal of the American Ceramic Society,1999(6):1447-1450. |
| [3] | Fu Hong-gang;Qiang Lian-sheng;Xu Chong-quan .The Structure and Size-effect of Calcium Modified Lead Titanate Nanocrystal, Pb_0.85 Ca_0.15TiO_3[J].Chemical Research in Chinese Universities,1999(2):158-162. |
| [4] | 王成建;肖鸣山;张承琚 等.Nd2O3改性 PbTiO3陶瓷性能的研究[J].中国稀土学报,1997,15(02):126-129. |
| [5] | Nalini G;Sahana M;Hegde M S et al.Structure of the mixed oxides La06Pb04Mn1-yTiyO3(0 refinements[J].Materials Research Bulletin,2001,36:307-314. |
| [6] | Nachimuthu P;Jagannathan R .Judd-Ofelt Paramaters,Hypersensitivity,and Emission Characteristics of Ln3+(Nd3+,Ho3+,and Er3+) Ions Doped in PbO-PbF2 Glasses[J].Journal of the American Ceramic Society,1999,82(02):387. |
| [7] | Jianxin, Shi;Yongde, Wei. .Investigation on intercalated graphite with metals by the method of chemical bond parameter function[J].The journal of physics and chemistry of solids,1999(3):363-366. |
| [8] | 韦永德,马楠,侯仰龙.RE-Al-Zr-C-N多元渗的XPS研究[J].中国稀土学报,2001(02):154-157. |
| [9] | 唐小锋,唐子龙,周志刚.BaTiO3基PTCR陶瓷的复阻抗谱研究[J].无机材料学报,2000(06):1037-1042. |
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%