| 铌硅锰非均匀形核表面淀积掺杂PTC陶瓷 |
| |
| 引用本文： | 盘耀东,庄志强,刘勇. 铌硅锰非均匀形核表面淀积掺杂PTC陶瓷[J]. 电子元件与材料, 2007, 26(5): 7-10 |
| |
| 作者姓名： | 盘耀东 庄志强 刘勇 |
| |
| 作者单位： | 华南理工大学材料科学与工程学院,广东,广州,510640;华南理工大学材料科学与工程学院,广东,广州,510640;华南理工大学材料科学与工程学院,广东,广州,510640 |
| |
| 摘 要： | 采用非均匀形核表面淀积法,在水热钛酸钡纳米晶粉体表面包覆Nb、Si、Mn,实现了Nb、Si、Mn与钛酸钡(BT)粉体的均匀混合。研究了掺杂量和烧结制度对PTC陶瓷性能的影响。结果表明,通过表面包覆工艺进行Nb掺杂的BT,在1 220℃已半导化,在1 250℃烧结的x(Nb)为0.18%的BT陶瓷,其ρ25为4.3?.cm,β为1.7。通过控制冷却速率,可以改变陶瓷的升阻比(β)。1 260℃烧结的Nb、Si、Mn掺杂BT陶瓷的ρ25为8.5Ω.cm、β比单纯Nb掺杂提高至4.9。
|
| 关 键 词： | 电子技术 铌硅锰 非均匀形核 表面淀积 PTC陶瓷 |
| 文章编号： | 1001-2028（2007）05-0007-04 |
| 修稿时间： | 2006-12-22 |
Barium titanate based PTC ceramics doped by Nb-Si-Mn heterogeneous nucleation surface deposition method |
| |
| PAN Yao-dong,ZHUANG Zhi-qiang,LIU Yong. Barium titanate based PTC ceramics doped by Nb-Si-Mn heterogeneous nucleation surface deposition method[J]. Electronic Components & Materials, 2007, 26(5): 7-10 |
| |
| Authors: | PAN Yao-dong ZHUANG Zhi-qiang LIU Yong |
| |
| Abstract: | Niobium oxalate,manganese nitrate and n-ethyl silicate were coated on hydrothermally-synthesized barium titanate powders by a heterogeneous nucleation surface deposition method,leading to the homogeneous mixing of Nb2O5,MnO2,SiO2 and BT powders.Effects of doped amount and sintering conditions on the properties of the PTC ceramics were studied.Obtained results show that with a surface coating method Nb-doped BT ceramic sintered at 1 220 ℃ becomes a semiconductor,ρ25 of 0.18 % Nb-doped BT ceramic is as low as 4.3 Ω.cm and the jump range of ceramics can be changed by the control of cooling rate during sinter.ρ25 of Nb-Mn-Si-doped BT ceramics sintered at 1 260 ℃ is 84.5 Ω·cm and the jump range is increased from 1.7 to 4.9. |
| |
| Keywords: | electron technology Nb-Si-Mn heterogeneous nucleation surface deposition PTC ceramics |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
