Preparation, characterization and dielectric properties of CaCu3Ti4O12 ceramics
Source abstract
Abstract
Abstract CaCu3Ti4O12 nano-sized powders were successfully prepared by sol–gel technique and calcination at 600–900 °C. The thermal decomposition process, phase structures and morphology of synthesized powders were characterized by IR, DSC-TG, XRD, TEM, respectively. It was found that the main weight-loss and decomposition of precursors occurred below 450 °C and the complex perovskite phase appeared when the calcination temperature was higher than 700 °C. Using above synthesized powders as starting materials, CCTO-based ceramics with excellent dielectric properties (ɛ25 = 5.9 × 104, tan δ = 0.06 at 1.0 kHz) were prepared by sintering at 1125 °C. According to the results, a conduction mechanism was proposed to explain the origin of giant dielectric constant in CCTO system.
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 (24)
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1. Base-metal electrode-multilayer ceramic capacitors: past, present and future perspectives10.1143/JJAP.42.1 ↗
2. Dielectric properties and phase transition behavior of xPMN-(1−x)PZT ceramic systems10.1023/A:1024023823871 ↗
3. Structural and dielectric properties of Ba0.85Sr0.15(Zr0.18Ti0.85)O3 thin films grown by a sol–gel process10.1016/j.ceramint.2003.12.073 ↗
4. Science and technology of high dielectric constant thin films and materials integration for application to high frequency devices10.1023/B:JECR.0000034006.59246.5e ↗
5. Ageing and fatigue of lead titanate and lead zirconate titanate thin ferroelectric films10.1016/j.solidstatesciences.2009.04.031 ↗
6. A high-permittivity SrTiO3-based grain boundary barrier layer capacitor material single-fired under low temperature10.1016/S0167-577X(02)00617-1 ↗
7. Preparation and electrical properties of SrTiO3 ceramics doped with M2O3–PbO–CuO10.1016/j.sse.2004.04.009 ↗
8. Charge transfer in the high dielectric constant materials CaCu3Ti4O12 and CdCu3Ti4O1210.1103/PhysRevB.67.092106 ↗
9. Dielectric relaxations and formation mechanism of giant dielectric constant step in CaCu3Ti4O12 ceramics10.1063/1.2785128 ↗
10. Enhanced dielectric response of GeO2-doped CaCu3Ti4O12 ceramics10.1063/1.3075909 ↗
11. Dielectric materials for sintering in reducing atmospheres10.1016/S0955-2219(01)00082-6 ↗
12. Dielectric permittivity and loss of CaCu3Ti4O12(CCTO) substrates for microwave devices and antennas10.1023/B:JMSE.0000038920.30408.77 ↗
13. The effect of processing on the giant dielectric properties of CaCu3Ti4O1210.1016/j.mseb.2004.11.019 ↗
14. Clues to the giant dielectric constant of CaCu3Ti4O12 in the defect structure of SrCu3Ti4O1210.1021/cm048345u ↗
15. Evidence for power-law frequency dependence of intrinsic dielectric response in the CaCu3Ti4O1210.1103/PhysRevB.70.144101 ↗
16. Extrinsic models for the dielectric response of CaCu3Ti4O1210.1063/1.1595708 ↗
17. Raman scattering and X-ray diffraction studies of polycrystalline CaCu3Ti4O12 under high-pressure10.1103/PhysRevB.70.132103 ↗
18. Nonintrinsic origin of the colossal dielectric constants in CaCu3Ti4O1210.1103/PhysRevB.70.172102 ↗
19. Effects of cation stoichiometry on the dielectric properties of CaCu3Ti4O1210.1016/j.jallcom.2008.06.015 ↗
20. Novel high capacitance materials: BaTiO3:La and CaCu3Ti4O1210.1016/S0955-2219(03)00510-7 ↗
21. Electric and dielectric properties of pure and doped CaCu3Ti4O12 perovskite materials10.1016/j.ssc.2004.07.058 ↗
22. Charge compensation mechanisms in La-doped BaTiO310.1023/A:1011400630449 ↗
23. Defect chemistry of Er-doped BaTiO310.1016/S0167-2738(01)00695-6 ↗
24. Electronic properties of grain boundaries in SrTiO3 and BaTiO3 ceramics10.1016/0167-2738(94)00152-I ↗