Tuning the nonlinear current-voltage behavior of CaCu3Ti4O12 ceramics by spark plasma sintering
Source abstract
Abstract
Abstract CaCu3Ti4O12 ceramics have been prepared by the spark plasma sintering method. Our results indicate that facile fabrication process control can lead to an obvious microstructure change, and thus modulate the nonlinear current-voltage properties such as the breakdown electric field Eb (0.33–9.28 kV/cm) and nonlinear coefficient α (2.4–21.5). The SPS ceramics sintered at 900 °C for 5 min possess the largest Eb and α values, which are much higher than those of previous pure CaCu3Ti4O12 ceramics without dopants. It is suggested that the synergistic effects of enhanced barrier height, large activation energy at grain boundaries, and the evolution of microstructure lead to the superior J-E performance in present samples. These results reveal that the CaCu3Ti4O12 material has a promising prospect in the application as a varistor.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Dielectric properties of ceramics · Ferroelectric and Piezoelectric Materials · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. High dielectric constant in ACu3Ti4O12 and ACu3Ti3FeO12 phases10.1006/jssc.2000.8703 ↗
2. Optical response of high-dielectric-constant perovskite-related oxide10.1126/science.1061655 ↗
3. Strong nonlinear current-voltage behaviour in perovskite-derivative calcium copper titanate10.1038/nmat1238 ↗
4. High dielectric and nonlinear electrical behaviors in TiO2-rich CaCu3Ti4O12 ceramics10.1063/1.2198479 ↗
5. Dielectric and nonlinear current-voltage characteristics of rare-earth doped CaCu3Ti4O12 ceramics10.1063/1.3658258 ↗
6. Role of oxygen on the phase stability and microstructure evolution of CaCu3Ti4O12 ceramics10.1016/j.jeurceramsoc.2016.07.039 ↗
7. Giant barrier layer capacitance effects in CaCu3Ti4O12 ceramics10.1002/1521-4095(20020916)14:18<1321::AID-ADMA1321>3.0.CO;2-P ↗
8. Defect structure of the high-dielectric-constant perovskite CaCu3Ti4O1210.1103/PhysRevB.71.014118 ↗
9. Initial cation stoichiometry and current-voltage behavior in Sc-doped calcium copper titanate10.1063/1.2179110 ↗
10. Evolution of CaCu3Ti4O12 varistor properties during heat treatment in vacuum10.1016/j.ceramint.2006.04.003 ↗
11. Dielectric and varistor behavior of CaCu3Ti4O12-MgTiO3 composite ceramics10.1111/j.1551-2916.2011.04533.x ↗
12. Selectivity of doping ions to effectively improve dielectric and non-ohmic properties of CaCu3Ti4O12 ceramics10.1016/j.ceramint.2013.03.086 ↗
13. Dielectric properties and current-voltage nonlinear behavior of Ca1-xSrxCu3Ti4O12 ceramics10.1016/j.jallcom.2009.03.190 ↗
14. Dielectric and nonlinear electrical behaviors of La-doped CaCu3Ti4O12 ceramics10.1063/1.3194311 ↗
15. Effect of vanadium doping on the dielectric and nonlinear current-voltage characteristics of CaCu3Ti4O12 ceramic10.1016/j.jallcom.2010.07.094 ↗
16. Electric and dielectric behaviors of Y-doped calcium copper titanate10.1111/j.1551-2916.2010.04022.x ↗
17. Tunable current-voltage characteristics in polycrystalline calcium copper titanate10.1063/1.2777184 ↗
18. Giant dielectric constant in CaCu3Ti4O12 nanoceramics10.1063/1.4811154 ↗
19. Grain size effect on the giant dielectric constant of CaCu3Ti4O12 nanoceramics prepared by mechanosynthesis and spark plasma sintering10.1063/1.4871979 ↗
20. Structure, properties, and impedance spectroscopy of CaCu3Ti4O12 ceramics prepared by sol-gel process10.1111/j.1551-2916.2007.02096.x ↗
21. Evidence of the internal domains for inducing the anomalously high dielectric constant of CaCu3Ti4O1210.1021/cm051180k ↗
22. Origin of giant dielectric response in nonferroelectric CaCu3Ti4O12: inhomogeneous conduction nature probed by atomic force microscopy10.1021/cm0710507 ↗
23. Very high-performance dielectric properties of Ca1-3x/2YbxCu3Ti4O12 ceramics10.1016/j.jallcom.2014.05.143 ↗
24. CaCu3Ti4O12: one-step internal barrier layer capacitor10.1063/1.1463211 ↗
25. Origin(s) of the apparent high permittivity in CaCu3Ti4O12 ceramics: clarification on the contributions from internal barrier layer capacitor and sample-electrode contact effects10.1063/1.3253743 ↗
26. Effect of copper-rich secondary phase at the grain boundaries on the varistor properties of CaCu3Ti4O12 ceramics10.1111/j.1551-2916.2008.02674.x ↗
27. Varistor ceramics10.1111/j.1151-2916.1999.tb01793.x ↗
28. Giant dielectric and low voltage varistor behaviors of Ba-doped Bi1/2Na1/2Cu3Ti4O12 ceramics
29. Effect of oxygen sintering atmosphere on the electrical behavior of CCTO Ceramics10.1016/j.jeurceramsoc.2011.11.039 ↗
30. Effects of sintering temperature on the internal barrier layer capacitor (IBLC) structure in CaCu3Ti4O12 (CCTO) ceramics10.1016/j.jeurceramsoc.2012.03.040 ↗
31. Evolution of the intergranular phase during sintering of CaCu3Ti4O12 ceramics10.1016/j.jeurceramsoc.2009.08.024 ↗
32. Effect of sintering conditions on microstructure and dielectric properties of CaCu3Ti4O12 (CCTO) ceramics10.1007/s10832-015-9982-0 ↗