Synthesis of CaCu3Ti4O12 ceramic via a sol-gel method

Jin, Shan; Xia, Haiping; Zhang, Yuepin; Guo, Jingdong; Xu, Jing

doi:10.1016/j.matlet.2006.07.041

Cited by 70 publications

(36 citation statements)

References 8 publications

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“…RS is a spectroscopic technique used to observe vibrational, rotational, and other low-frequency modes in a system 7 . Figure 3 shows the Raman spectra for BaTiO 3 (A1(TO), E(TO)) and 717 cm -1 (A1(LO), E(LO)). Similar bands were observed in BaTiO 3 based ceramics by Suchanicz et al 13 and Pokorny et al…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…BT is widely used in the manufacture of piezoelectric devices, electrooptical elements, ceramic capacitors, and resistors due to its high dielectric constant and semiconducting properties when they are modified using aliovalent or isovalent dopants 2 . The high dielectric constant allows smaller capacitive components, thus offering an opportunity to reduce the size of electronic devices 3,4 . The understanding of how these particular crystalline structures evolve from the tetragonal perovskite structure might provide a way to engineer more compounds with hexagonal structure.…”

Section: Introductionmentioning

confidence: 99%

“…The inclusion of Gd into the pseudo-cubic host lattice of BT is rarely found in the literature. The main goal of this work was the investigation of structural evolution and electrical properties of BaTiO 3 …”

Section: Introductionmentioning

confidence: 99%

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Structural Evolution and Electrical Properties of BaTiO3 Doped with Gd3+

et al. 2017

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BaTiO 3 doped with Gd 3+ (Ba 1-x Gd x Ti 1-x/4 O 3 ) was synthesized using the solid-state reaction method with x = 0. 001, 0.003, 0.005, 0.01, 0.05, 0.1, 0.15, 0.20, 0.25, 0.30, and 0.35 Gd 3+ (wt. %). The powders were decarbonated at 900 °C and sintered at 1400 °C for 8 hours. The tetragonality of the synthesized Gd 3+ -doped BaTiO 3 particles was analyzed. XRD patterns and Raman spectra revealed that the crystal phase of the obtained particles was predominately tetragonal BaTiO 3 ; the intensity of the Raman bands at 205 cm , and 304 cm −1 decreased when Gd 3+ was increased. A secondary phase (Gd 2 Ti 2 O 7 ) was found when the Gd 3+ content was higher than 0.15 wt. %. The capacitance of the sintering pellets was measured at 1 kHz; these values were used to calculate the relative permittivity, the maximum permittivity values were recorded for the samples with x = 0.001, 0.005, and 0.1.

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Section: Raman Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural Evolution and Electrical Properties of BaTiO3 Doped with Gd3+

et al. 2017

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“…At present, a possible explanation that an internal barrier layer capacitance (IBLC) model between the insulating grain boundaries and semiconducting grains, is widely accepted by the researchers. High dielectric constant values may be variously attributed to [6][7][8] A variety of methods [10][11][12][13] has been reported by several researchers to prepare this giant dielectric material. Among these the most adopted and traditional solid state reaction method lacks in terms of homogeneity of precursor materials.…”

Section: Introductionmentioning

confidence: 99%

An Overview on Recent Developments in the Synthesis, Characterization and Properties of High Dielectric Constant Calcium Copper Titanate Nano-Particles

Mandal¹

2014

NSTOA

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“…High dielectric constants allow smaller capacitive components, offering the opportunity to decrease the size of electronic devices. Thus, it is mostly used to make multilayer ceramic capacitor (MLCC) materials in microelectronic industry [4,5]. Various studies are performed to investigate the prepared methods of CaCu 3 Ti 4 O 12 powders [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Oleic acid assisted synthesis of CaCu3Ti4O12 powders and ceramics by sol–gel process

Wang

Zhang

Zhou

2014

J Mater Sci: Mater Electron

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The CaCu 3 Ti 4 O 12 (CCTO) powders were prepared via a sol-gel method using oleic acid (OA) as surfactant. The obtained samples were characterized by thermogravimetric/differential scanning calorimeter Fourier transform-infrared spectroscopy, X-ray diffraction (XRD) and scanning electron microscope, the relative density and the dielectric properties of the ceramics were also investigated. The XRD patterns confirm the formation of CCTO crystal phase and no new peaks appeared whether the dispersant was added or not. The dispersibility of the CCTO powders is improved by adding OA as surfactant. The CCTO prepared without surfactant contains particles of various sizes ranging from 200 to 250 nm whereas the CCTO prepared with OA shows uniform particle size about 120-150 nm. The CCTO ceramics prepared with OA has higher dielectric constant (199484) and lower dielectric loss (0.0977) at 25°C (10 kHz).

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Synthesis of CaCu3Ti4O12 ceramic via a sol-gel method

Cited by 70 publications

References 8 publications

Structural Evolution and Electrical Properties of BaTiO3 Doped with Gd3+

Structural Evolution and Electrical Properties of BaTiO3 Doped with Gd3+

An Overview on Recent Developments in the Synthesis, Characterization and Properties of High Dielectric Constant Calcium Copper Titanate Nano-Particles

Oleic acid assisted synthesis of CaCu3Ti4O12 powders and ceramics by sol–gel process

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