采用气相法对PbTiO3陶瓷扩渗Nd元素,经Nd扩渗,PbTiO3陶瓷的电性能发生了十分显著的变化.通过正交实验,确定了最佳扩渗条件,当Nd的浓度为1.5%(w), 扩渗时间为4h,扩渗温度为860℃时,PbTiO3陶瓷的导电性最好,其室温电阻率从2.0×1010Ω*m下降为10.5Ω*m.经Nd扩渗的PbTiO3陶瓷的晶粒电阻随着温度的变化,呈现PTC效应,而晶界电阻随着温度的升高,呈急剧连续降低状态,总电阻的变化规律与晶界电阻的变化相一致,但PTC效应已不存在,有向导电体过渡的趋势.
参考文献
| [1] | Cohen E .Origin of ferroelectricity in perovskite oxides[J].Nature,1992,358(09):136-138. |
| [2] | SUN Ping;Xu Chaonan;Akiyama Morito .Controlled oxygen partial pressure sintering of(Pb,La)(Zr,Ti) O3 ceramics[J].Journal of the American Ceramic Society,1999,82(06):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;Hende M S et al.Structure of the mixed oxides La0.6Pb0.4Mn1-yTiyO3(0 |
| [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] | Shimooka H;Kuwabara M .Preparation of dense BaTiO3 ceramics from sol-gel-derived-monolithic gels[J].Journal of the American Ceramic Society,1995,78(10):2849-2852. |
| [10] | 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. |
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