Microstructure transition from normal to abnormal grains for BaTiO3

Chen, Yinhua; Lu, Shih-Chun; Tuan, Wei‐Hsing; Chen, Chin-Yi

doi:10.1016/j.jeurceramsoc.2009.06.027

Cited by 7 publications

(5 citation statements)

References 24 publications

(50 reference statements)

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“…Liquid phase formation was caused by TiO 2 excess in relation to BaO in the initial BT powder (small amounts of Ba 4 Ti 12 O 27 detected by XRD). The sintering temperature of 1300 • C was close to the eutectic value of BaTiO 3 -Ba 6 Ti 17 O 40 (about 1320 • C) [25,26]. After the milling of powder, the traces of liquid phase disappeared (Figure 10c,d).…”

Section: Materials Characterizationmentioning

confidence: 59%

“…For this reason, the decrease of tetragonality was observed in the conventionally-manufactured samples with prolongation of milling (Figure 9). Slightly elongated AG are likely to grow below the eutectic mentioned above, while, above the eutectic, they appear equiaxed [25]. TiO 2 excess in the raw BT powder is often assumed as a condition for AG growth [26].…”

Section: Materials Characterizationmentioning

confidence: 99%

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The Fabrication and Characterization of BaTiO3 Piezoceramics Using SLA 3D Printing at 465 nm Wavelength

et al. 2022

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The additive manufacturing of BaTiO3 (BT) ceramics through stereolithography (SLA) 3D printing at 465 nm wavelength was demonstrated. After different milling times, different paste compositions with varied initial micron-sized powders were studied to find a composition suitable for 3D printing. The pastes were evaluated in terms of photopolymerization depth depending on the laser scanning speed. Furthermore, the microstructure and properties of the BT ceramic samples produced through SLA 3D printing were characterized and compared with those of ceramics fabricated through a conventional die semi-drying pressing method. Three-dimensional printed samples achieved relative densities over 0.95 and microhardness over 500 HV after sintering, nearly matching the relative density and microhardness attained by the pressed samples. Upon poling, the 3D-printed samples attained acceptable piezoelectric module d33 = 148 pC/N and dielectric constants over 2000. At near full density, BT piezoceramics were successfully fabricated through SLA 3D printing at 465 nm wavelength, achieving photopolymerization depth of more than 100 microns. This work paves the relatively low-cost way for 3D printing of piezoelectric ceramics using conventional micron-sized powders and high printed layer thickness.

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Section: Materials Characterizationmentioning

confidence: 59%

Section: Materials Characterizationmentioning

confidence: 99%

The Fabrication and Characterization of BaTiO3 Piezoceramics Using SLA 3D Printing at 465 nm Wavelength

et al. 2022

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“…The authors clearly indicate that an intermediate BaCO 3 phase has formed, which is also consistent with independent report, but decomposes at temperatures above 700 °C. In complex metal oxides and perovskites such as BTO, abnormal grain growth is a common phenomenon and can have multiple reasons. , One obvious reason that is associated with the use of nanomaterials, however, would be that during the overall process large-grained BaCO 3 structures of the type described in Figures and a have formed as intermediates to serve as precursor grain for the significantly larger BTO grains that result from subsequent sintering-induced carbonate decomposition. Inspection of the electron microscopy data reported in refs and with structures reported in this study may substantiate this hypothesis, which is also in line with the earlier reported effects of residual BaCO 3 on the dedensification of BTO during sintering …”

Section: Results and Discussionmentioning

confidence: 99%

Water-Mediated Conversion of BaTiO₃ Nanoparticles into BaCO₃ Nanorods in Electrospun Polymer Fibers: Implications for Carbon Capture Applications

Razouq,

Neuhauser,

Zickler

et al. 2023

ACS Appl. Nano Mater.

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Under ambient conditions and in aqueous environments, transformations of nanoparticle-based ferroelectric components can raise important stability issues that are relevant for applications as multilayer capacitors, flexible piezoelectrics, or biomedical devices. We show that X-ray amorphous BaTiO3 nanoparticles that were grown by flame spray pyrolysis and which can be incorporated into electrospun polymer fibers undergo incongruent Ba2+ dissolution in the presence of water. At pH > 5 and in contact with air, corresponding Ba solutes spontaneously convert into crystalline BaCO3 needles to produce characteristic nano- and microstructures. We compared the reactivity of amorphous BaTiO3 nanoparticle powders with those of nanocrystals after annealing-induced crystallization. The stability of aqueous nanoparticle–polymer formulations, which are typically part of nanoparticle encapsulation in polymers and electrospinning, was included in this analysis. Nanoparticle size, crystallinity, surface area, the presence of carbonaceous surface contaminants, and the effect of surface passivation with polymers are addressed to underline the critical role of condensed water during the synthesis, storage, and processing of BaTiO3 nanoparticle-based composites.

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“…16 A brief description is given here. A commercial BaTiO 3 powder (NEB, Ferro Co., Inc., OH, USA) with a reported Ba/Ti ratio of 1.000 ± 0.002 was used as the raw material.…”

Section: Methodsmentioning

confidence: 99%

Effect of microstructure on dielectric and fatigue strengths of BaTiO3

Chen

Tuan

et al. 2010

Journal of the European Ceramic Society

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Microstructure transition from normal to abnormal grains for BaTiO3

Cited by 7 publications

References 24 publications

The Fabrication and Characterization of BaTiO3 Piezoceramics Using SLA 3D Printing at 465 nm Wavelength

The Fabrication and Characterization of BaTiO3 Piezoceramics Using SLA 3D Printing at 465 nm Wavelength

Water-Mediated Conversion of BaTiO₃ Nanoparticles into BaCO₃ Nanorods in Electrospun Polymer Fibers: Implications for Carbon Capture Applications

Effect of microstructure on dielectric and fatigue strengths of BaTiO3

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Microstructure transition from normal to abnormal grains for BaTiO3

Cited by 7 publications

References 24 publications

The Fabrication and Characterization of BaTiO3 Piezoceramics Using SLA 3D Printing at 465 nm Wavelength

The Fabrication and Characterization of BaTiO3 Piezoceramics Using SLA 3D Printing at 465 nm Wavelength

Water-Mediated Conversion of BaTiO3 Nanoparticles into BaCO3 Nanorods in Electrospun Polymer Fibers: Implications for Carbon Capture Applications

Effect of microstructure on dielectric and fatigue strengths of BaTiO3

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Water-Mediated Conversion of BaTiO₃ Nanoparticles into BaCO₃ Nanorods in Electrospun Polymer Fibers: Implications for Carbon Capture Applications