| Original Articles |
|
|
|
|
Nonlinear Electrical Behaviour of the TiO2.Y2O3.Nb2O5 System |
| LI Chang-Peng;WANG Jin-Feng;WANG Yong-Jun;SU Wen-Bin;CHEN Hong-Cun;ZHUANG De-Xin |
| Department of Physics, Shandong University, Jinan 250100 |
|
| Cite this article: |
|
LI Chang-Peng, WANG Jin-Feng, WANG Yong-Jun et al 2001 Chin. Phys. Lett. 18 674-676 |
|
|
|
|
Abstract The nonlinear properties and the dielectric properties of a new TiO2-based varistor system, TiO2.Y2O3.Nb2O5, have been investigated. The (Nb, Y)-doped TiO2 ceramics have nonlinear coefficients of α =5-8 and a lower breakdown electrical field of 6-12V.mm-1, in which the varistor of (99.3mol%)TiO2.(0.6mol%)Y2O3.(0.1mol%)Nb2O5 composite sintered at 1400°C has a nonlinear coefficient of α =7.8 and a maximum breakdown electrical field of 12 V.mm-1 at 1 mA.cm-2. Also, the relative dielectric constants of the composite reach more than 85000, which is almost unchanged within the temperature range from -20 to 280°C and the frequency range of 0.5 K-2 MHz. Due to these properties the (Nb, Y)-doped TiO2 varistors has varistor capacitance bifunctional components, which are quite useful in the situation that the voltage protection and high frequency noise absorption are meanwhile required.
|
| Keywords:
74.40.Lq
72.80.Jc
|
|
|
Published: 01 May 2001
|
|
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
