Improved dielectric, nonlinear and magnetic properties of cobalt-doped CaCu3Ti4O12 ceramics

Wang, Jing; Lu, Zhenya; Deng, Tengfei; Zhong, Caifu; Chen, Zhiwu

doi:10.1016/j.jeurceramsoc.2018.04.015

Cited by 60 publications

(21 citation statements)

References 31 publications

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“…The doping of CCTO by Cobalt was studied by Mu et al, [56] Kafi et al [57] and Wang et al [58] Mu et al [56] prepared CaCu 3 Ti 1À x Co x O 12 (x = 0, 0.2, 0.4) ceramics by a conventional solid state reaction. Both X-ray diffraction and energy dispersive X-ray spectroscopy confirmed 3.14 × 10 3 0.161 [42] Spark Plasma Sintering CaCO 3 , TiO 2 , CuO 900°C/5 min 10 5 - [46] Thermobaric Treatment (TBT) CaCO 3 , TiO 2 , CuO CS: 1100°C/24 h TBT:1000°C/10 min (9 GPa) 10 3~1 0 [50] [54] the presence of Cu and Co rich phase at grain boundaries of Co-doped ceramics ( Figure 26).…”

Section: Doping Of Ccto By One Elementmentioning

confidence: 99%

“…Wang et al [58] showed that the doping of CCTO by 5 % of Co improved the dielectric properties and gave dielectric constant ɛ' � 7.4 × 10 4 and dielectric loss tanδ � 0.034 at room temperature and 1 KHz. The authors explained that the Cobalt replaces the Copper ion in the CCTO structure ( Figure 27).…”

Section: Doping Of Ccto By One Elementmentioning

confidence: 99%

“…[121] CaCu 3 Ti 4 O 12 is a bulk material with a antiferromagnetic behavior below Neel temperature (T N = 25 K) studied with neutron diffraction and susceptibility measurements, [122] due to spins (S = 1/2) aligned antiferromagnetically on the A sites Cu 2 + [56] In order to enhance CCTO magnetic properties and to produce multiferroic material stable at room temperature, many investigations were performed by doping CCTO. [56,122,123] Wang et al [58] doped CCTO ceramics using Cobalt (Co) by solid-state method. They showed from hysteresis loops, a weak ferromagnetism due to the superexchange interaction along [118]…”

Section: Magnetic Propertiesmentioning

confidence: 99%

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From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

et al. 2019

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Investigations focusing on electrical energy storage capacitors especially the dielectric ceramic capacitors for high energy storage density are attracting more and more attention in the recent years. Ceramic capacitors possess a faster charge‐discharge rate and improved mechanical and thermal properties compared with other energy storage devices such as batteries. The challenge is to obtain ceramic capacitors with outstanding mechanical, thermal and storage properties over large temperature and frequencies ranges. ABO 3 as a type of perovskites showed a strong piezoelectric, dielectric, pyroelectric, and electro‐optic properties useful as energy storage and environmental devices. CaCu 3 Ti 4 O 12 (CCTO) perovskite with cubic lattice (Im3 symmetry) was discovered to have a colossal dielectric constant (10 4 ) that is stable over a wide range of frequencies (10 Hz–1 MHz) and temperature independence (100–300 K). The origin of this high dielectric constant is not fully established, specially because it is the same for single crystal and thin films. In this review, the history of CCTO will be introduced. The synthesis and the sintering approaches, the dopant elements used as well as the applications of CCTO will be reported. In addition to dielectrical properties useful to energy storage devices; CCTO could serve as photocatalytic materials with a very good performance in visible light.

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Section: Doping Of Ccto By One Elementmentioning

confidence: 99%

Section: Doping Of Ccto By One Elementmentioning

confidence: 99%

Section: Magnetic Propertiesmentioning

confidence: 99%

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From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

et al. 2019

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“…The literature has shown some results obtained using different dopants. Wang et al [17] using 5 mol % of Co (CaCu 2.95 Co 0.05 Ti 4 O 12 ) obtained   5.22 and E b = 300.46 V/cm [17]. When using 20 mol % of Ni (CaCu 2.8 Ni 0.2 Ti 4 O 12 ), they found   5.47, E b = 101.7 V/cm [18].…”

Section: Introductionmentioning

confidence: 97%

“…Regarding CCTO, many studies have already investigated the improvement of electrical properties using dopants [17][18][19][20], the origin of the colossal permittivity [8,21,22] from different points of view and the results were published including single crystals [9,21,23], thin films [24][25][26] and polycrystalline samples [9,11,27,28].…”

Section: Introductionmentioning

confidence: 99%