New materials through a variety of sintering methods

Jaworska, L.; Cyboroń, Jolanta; Cygan, S.; Laszkiewicz-Łukasik, Jolanta; Podsiadło, Marcin; Novák, Pavel; Holovenko, Yaroslav

doi:10.1088/1757-899x/329/1/012004

Cited by 4 publications

(7 citation statements)

References 6 publications

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“…The aim of modern ceramic technologies is obtaining dense ceramic with nanostructured grains. That is why there are many factors to be optimized during the sintering process, starting from powders (shape and size of grains), green bodies manufacturing (dimensional changing during compacting which is dependent from the pressure) and sintering type and time . In this review, we will present four main methods of sintering used to obtain dense ceramic of CaCu 3 Ti 4 O 12 such as conventional sintering, microwave sintering, spark plasma sintering and thermobaric treatment.…”

Section: Sintering and Dielectric Propertiesmentioning

confidence: 99%

“…Three mechanisms affect the spark plasma sintering, such as enhancement of grain boundaries diffusion process by pulsed current, pressure application and resistance sintering. These three mechanisms have to be optimized in order to obtain a compact structure with grain‐to‐grain contact …”

Section: Sintering and Dielectric Propertiesmentioning

confidence: 99%

“…These three mechanisms have to be optimized in order to obtain a compact structure with grain-to-grain contact. [33] Kumar et al [47] prepared CCTO ceramics by sintering CCTO powders using the SPS method. The sintering temperature used is 1050°C and the duration of sintering is 10 min under uniaxial pressure of 50 MPa.…”

Section: Spark Plasma Sinteringmentioning

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: Sintering and Dielectric Propertiesmentioning

confidence: 99%

Section: Sintering and Dielectric 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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“…1 The sintering process requires the bulk diffusion of atoms from the particle interiors to the inter-particle necks, so high temperature (usually >1000°C) is needed to provide the energy for diffusion. [1][2][3][4][5][6][7][8] Among these methods, the liquid phase sintering is of significant importance, since it is compatible with the standard solid-state sintering method, and no extra device or process is needed. Many methods have been developed to lower the sintering temperature of ceramics, such as using fine ceramic powder, liquid phase sintering, spark plasma sintering, field assisted sintering, flash sintering, cold sintering and etc.…”

Section: Introductionmentioning

confidence: 99%

“…Many methods have been developed to lower the sintering temperature of ceramics, such as using fine ceramic powder, liquid phase sintering, spark plasma sintering, field assisted sintering, flash sintering, cold sintering and etc. [1][2][3][4][5][6][7][8] Among these methods, the liquid phase sintering is of significant importance, since it is compatible with the standard solid-state sintering method, and no extra device or process is needed. For the typical liquid phase sintering, a suitable sintering aid with low melting point is added into the ceramic powder, and the ceramic is soluble in the liquid sintering aid above its melting point.…”

Section: Introductionmentioning

confidence: 99%

Preparation and microwave dielectric properties of B₂O₃ bulk

Hong

Yan

et al. 2019

Int J Applied Ceramic Tech

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The transparent B2O3 bulks were prepared by quenching B2O3 melt or cooling it down to room temperature with the rate of 0.1‐1°C/min. The quenched sample exhibited the dense microstructure, while the pores were observed for low cooling rates, and this is consistent with the slight decrease in density and permittivity (εr) with decreasing the cooling rate. Both the amorphous and cubic phases of B2O3 were indicated by XRD, and the content of the cubic phase increased with the decrease in cooling rate, which was responsible for the decreasing Qf value with the lower cooling rate. The temperature coefficient of resonant frequency (τf) was insensitive to the cooling rate, and the microwave dielectric properties with εr = 3.86‐3.97, Qf = 3,200‐5,300 GHz and τf = −48.9 to −42.8 ppm/°C were obtained in the B2O3 bulks. The reported microwave dielectric properties of B2O3 bulk are helpful to estimate the effects of the residual B2O3 on the properties of the microwave dielectric ceramics with B2O3 and H3BO3 as the sintering aid.

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