Control of particle morphology and size of yttria powder prepared by hydro(solvo)thermal synthesis

Oh, Bok-Hyun; Lee, Sang-Jin

doi:10.1007/s43207-022-00186-0

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…In the sintering process, the main factors affecting the densification of yttria are the raw material properties as well as the sintering process and methods [ 8 , 9 ]. At present, there are many methods to prepare yttria powders, such as precipitation, decomposition, combustion, and solvothermal techniques [ 10 , 11 , 12 , 13 , 14 ]. Although high-purity yttria powders can be prepared using these methods, no new technologies have been developed within these methods to further improve and control the performance of the resulting powders.…”

Section: Introductionmentioning

confidence: 99%

New Strategy for Preparation of Yttria Powders with Atypical Morphologies and Their Sintering Behavior

2023

Materials

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A modified precipitation method was used to prepare yttria powers for the fabrication of yttria ceramics in this study. The precipitation behavior, phase evolution, and shape of the yttria precursor were all examined in the presence or absence of an electric field. The findings demonstrate that the phases of the yttria precursor were Y2(CO3)3·2H2O with and without an electric field, while the morphology changed from flake to needle-like under the action of the electric field. After calcining both yttria precursors at 750 °C, yttria powders with similar morphologies were obtained and then densified via conventional sintering (CS) and spark plasma sintering (SPS). The densification and thermal shock resistance of the yttria ceramics were investigated. The yttria ceramics sintered using SPS had higher bulk density and thermal shock resistance than the samples sintered using CS. When the sintering process for the ceramics sintered from needle-like yttria powder was switched from CS to SPS, the bulk density increased from 4.44 g·cm−3 to 5.01 g·cm−3, while the number of thermal shock tests increased from two to six. The denser samples showed better thermal shock resistance, which may be related to the fracture mechanism shifting from intergranular fracture to transgranular fracture.

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Section: Introductionmentioning

confidence: 99%

New Strategy for Preparation of Yttria Powders with Atypical Morphologies and Their Sintering Behavior

2023

Materials

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Role of β-Si3N4 seeds in microstructure development and properties of silicon nitride ceramics: a comprehensive review

Govindasamy,

Park,

et al. 2024

J. Korean Ceram. Soc.

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Mechanistic insight into the synthesis and morphological evolution of yttrium oxide nanotubes

Si,

Yang,

et al. 2024

Ceramics International

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Control of particle morphology and size of yttria powder prepared by hydro(solvo)thermal synthesis

Cited by 3 publications

References 26 publications

New Strategy for Preparation of Yttria Powders with Atypical Morphologies and Their Sintering Behavior

New Strategy for Preparation of Yttria Powders with Atypical Morphologies and Their Sintering Behavior

Role of β-Si3N4 seeds in microstructure development and properties of silicon nitride ceramics: a comprehensive review

Mechanistic insight into the synthesis and morphological evolution of yttrium oxide nanotubes

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