Preparation of Y2O3–ZrO2–CeO2 solid solution by co-precipitation and its electrical property

Dong, Yihang; Pang, Lipeng; Han, Ye; Yao, Shuyu; Wang, Xiangnan

doi:10.1016/j.physb.2021.412972

Cited by 18 publications

(2 citation statements)

References 24 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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“…The most common representatives are ZrO 2 and CeO 2 and their solid solutions [1,2]. Compounds structured with fluorite-type cubic symmetry may be tailored to possess a wide range of properties, such as electrical properties, and to withstand high temperatures, high temperature gradients and mechanical stresses, which make them suitable for various technological applications not limited to ion conductors [3,4], thermal barrier coatings [5][6][7], ferroelectrics [8,9] or sensing [10].…”

Section: Introductionmentioning

confidence: 99%

Phase Formation in Heterovalent Equimolar Quinary Oxide Systems of ZrO2-HfO2-CeO2-Nb2O5-RE2O3 Type (RE = Y, Yb, Nd, Gd)

Surdu

Andronescu

2021

Ceramics

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Tailoring electrical and mechanical properties in the fluorite oxides family is of great interest for technological applications. Other than doping and substitution, entropy-driven stabilization is an emerging technique for new solid solutions formation and enhancing or exploring new functionalities. However, there is a high number of possible combinations for higher-order diagram investigations, and the current state of the art shows limited possibilities in predicting phase formation and related properties. In this paper, we expand the compositional space of fluorite oxides in ZrO2-HfO2-CeO2-Nb2O5-RE2O3 systems. X-ray diffractometry and scanning electron microscopy measurements showed the formation of cubic fluorite-type structures when processing compositions at 1600 °C.

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Sensing characteristics of a limiting current oxygen sensor with (8YSZ)0.85(Cr2O3)0.15 dense diffusion barrier

Wang

Shu

et al. 2023

Ionics

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Preparation of Y2O3–ZrO2–CeO2 solid solution by co-precipitation and its electrical property

Cited by 18 publications

References 24 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

Phase Formation in Heterovalent Equimolar Quinary Oxide Systems of ZrO2-HfO2-CeO2-Nb2O5-RE2O3 Type (RE = Y, Yb, Nd, Gd)

Sensing characteristics of a limiting current oxygen sensor with (8YSZ)0.85(Cr2O3)0.15 dense diffusion barrier

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