Low-temperature synthesis of nanoscale BaTiO3 powders via microwave-assisted solid-state reaction

Yun, Han-Sol; Yun, B.K.; Lee, Hyemin; Jeong, Dae-Yong; Lee, Wan-In; Cho, Nam-Hee

doi:10.1007/s42452-019-1398-z

Cited by 8 publications

(2 citation statements)

References 36 publications

(32 reference statements)

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“…Therefore, precursors having hydroxyl and water molecules are potential candidates for powder synthesis via MWH. Our previous preliminary research on the application of microwave irradiation in the synthesis of BaTiO 3 powders [ 15 ] confirmed that initial sources having hydroxyl and water molecules had a lower synthesis temperature compared to those without polar radicals.…”

Section: Introductionmentioning

confidence: 95%

Crystallization Kinetics in BaTiO3 Synthesis from Hydrate Precursors via Microwave-Assisted Heat Treatment

Yun

Shin

et al. 2021

Nanomaterials

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The crystallization kinetics in BaTiO3 synthesis from hydrate precursors via microwave-assisted heating (MWH) were investigated. The structural and chemical features of powders synthesized via MWH and conventional heating (CH) were compared. The charged radicals generated under microwave irradiation were identified by chemical analysis and real-time charge flux measurements. Using Ba(OH)2∙H2O (BH1), Ba(OH)2 (BH0), and BaCO3 (BC) as the precursors for a Ba source, and TiO2∙4H2O (TH) for a Ti source, three different mixture samples, BH1TH (BH1 + TH), BH0TH (BH0 + TH), and BCTH (BC + TH), were heat-treated in the temperature range of 100–900 °C. BaTiO3 powders were synthesized at temperatures as low as 100 °C when sample BH1TH was subjected to MWH. Based on the growth exponent (n), the synthesis reactions were inferred to be diffusion-controlled processes (3 ≤ n ≤ 4) for MWH and interface-controlled processes (2 ≤ n ≤ 3) for CH. Current densities of approximately 0.073 and 0.022 mA/m2 were measured for samples BH1TH and BH0TH, respectively, indicating the generation of charged radicals by the interaction between the precursors and injected microwaves. The radicals were determined as OH− groups by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy.

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Section: Introductionmentioning

confidence: 95%

Crystallization Kinetics in BaTiO3 Synthesis from Hydrate Precursors via Microwave-Assisted Heat Treatment

Yun

Shin

et al. 2021

Nanomaterials

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“…To enhance the microstructural uniformity of BaTiO 3 -based ceramics, various aspects of BaTiO 3 , such as synthesis procedures [10], sintering conditions [11], and nanostructural properties [12], have been studied. In particular, many researchers have investigated advanced synthetic methods, including the solid-state reaction (SSR) and sol-gel method, to prepare BaTiO 3 powder with fine particles and high crystallinity [13].…”

Section: Introductionmentioning

confidence: 99%

Crystal Structural Characteristics and Electrical Properties of (Ba0.7Sr0.3-xCax)(Ti0.9Zr0.1)O3 Ceramics Prepared Using the Citrate Gelation Method

Jeong,

Kim,

Kim

et al. 2023

Materials

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The electrical properties of (Ba0.7Sr0.3-xCax)(Ti0.9Zr0.1)O3 (0 ≤ x ≤ 0.2) (BSCTZ) ceramics prepared using citrate gelation (CG) method were investigated by substituting Ca2+ ions for the Sr2+ sites based on the structural characteristics of the ceramics. BSCTZ was sintered for 3 h at 1300 °C, lower than the temperature (1550 °C) at which the specimens prepared using the solid-state reaction (SSR) method were sintered, which lasted for 6 h. As the amount of substituted Ca2+ ions increased, the unit cell volume of the BSCTZ decreased because of the smaller ionic radius of the Ca2+ ions compared to the Sr2+ ions. The dielectric constant of BaTiO3-based ceramics is imparted by factors such as the tetragonality and B-site bond valence of the ceramics. Although the ceramic tetragonality increased with Ca2+ ion substitution, the x = 0.05 specimens exhibited the highest dielectric constant. The decrease in the dielectric constant of the sintered x > 0.05 specimens was attributed to the increase in the B-site bond valence of the ABO3 perovskite structure. Owing to the large number of grain boundaries, the breakdown voltage (6.6839 kV/mm) of the BSCTZ prepared using the CG method was significantly improved in relation to that (2.0043 kV/mm) of the specimen prepared using the SSR method.

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Enhancing dielectric properties and thermal stability in microwave-synthesized Nd-modified barium titanate nanoceramics for possible MLCC applications

Alkathy,

Milton,

Gatasheh

et al. 2024

Appl. Phys. A

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Low-temperature synthesis of nanoscale BaTiO3 powders via microwave-assisted solid-state reaction

Cited by 8 publications

References 36 publications

Crystallization Kinetics in BaTiO3 Synthesis from Hydrate Precursors via Microwave-Assisted Heat Treatment

Crystallization Kinetics in BaTiO3 Synthesis from Hydrate Precursors via Microwave-Assisted Heat Treatment

Crystal Structural Characteristics and Electrical Properties of (Ba0.7Sr0.3-xCax)(Ti0.9Zr0.1)O3 Ceramics Prepared Using the Citrate Gelation Method

Enhancing dielectric properties and thermal stability in microwave-synthesized Nd-modified barium titanate nanoceramics for possible MLCC applications

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