Structure and performance evolution of the system (Gd1−Nd )2(Zr1−Ce )2O7 (0 ≤x, y≤ 1.0)

Shu, Xiaoyan; Fan, Ling; Lu, Xirui; Xie, Yi; Ding, Yi

doi:10.1016/j.jeurceramsoc.2015.04.037

Cited by 48 publications

(10 citation statements)

References 36 publications

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“…Generally speaking, pyrochlore-phased Gd 2 Zr 2 O 7 can be fabricated in the temperature range of 1400-1500°C by joule heating. 35,[41][42][43][44] With the combination of chemical reaction in precursor synthesis, the fabrication temperature of fluorite-phased Gd 2 Zr 2 O 7 could be reduced to even 1100°C. 40,45,46 Moreover, beyond 1650°C, fluoritephased Gd 2 Zr 2 O 7 tend to be prepared either by both joule heating and SPS (FAST/SPS) sintering method.…”

Section: Resultsmentioning

confidence: 99%

“…To find out the relationship of the sintering condition and the samples’ final phase, the reported data is summarized in Figure from the aspects of method, temperature and time. Generally speaking, pyrochlore‐phased Gd 2 Zr 2 O 7 can be fabricated in the temperature range of 1400‐1500°C by joule heating . With the combination of chemical reaction in precursor synthesis, the fabrication temperature of fluorite‐phased Gd 2 Zr 2 O 7 could be reduced to even 1100°C .…”

Section: Resultsmentioning

confidence: 99%

“…33 As we know, it experiences order-disorder transition beyond 1500°C. 34,35 Then, the question of what is the thermal response at even higher temperature was raised. Equally important, a potential Gd 2 Zr 2 O 7 material for immobilizing nuclear waste was hoped, which was based on the excellent property of Gd 2 Zr 2 O 7 ceramics and the inner superiority of glass-ceramics in nuclear waste disposal.…”

Section: Introductionmentioning

confidence: 99%

“…Gd 2 Zr 2 O 7 is a rather widely used material as high temperature thermal insulating material and solid oxide fuel cells . As we know, it experiences order‐disorder transition beyond 1500°C . Then, the question of what is the thermal response at even higher temperature was raised.…”

Section: Introductionmentioning

confidence: 99%

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Rapid synthesis of Gd₂Zr₂O₇ glass‐ceramics using spark plasma sintering

et al. 2019

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Glass‐ceramics are possible host matrix for high level waste immobilization. The Gd2Zr2O7 glass‐ceramic matrix was successfully synthesized using spark plasma sintering (SPS) method in 5 minutes. The phase transition with sintering temperature was studied using X‐ray diffraction, Raman and transmission electron microscopy. It revealed that samples kept a main defected fluorite phase as being sintered below 1800°C. Glass phase increased rapidly beyond 1850°C. The amorphous structure became the main body at 1900°C, with nanoscale crystal scattered in the bulk. With the increase of glass phase, the grain boundary became almost indistinguishable. The relationship between the final phase of Gd2Zr2O7 with its synthetic temperature range and corresponding technology was reviewed. Gd2Zr2O7 glass‐ceramics could be acquired by extending the sintering temperature beyond 1850°C using SPS method.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rapid synthesis of Gd₂Zr₂O₇ glass‐ceramics using spark plasma sintering

et al. 2019

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“…Pyrochlore is a kind of solidified base material for artificial rock which has been studied extensively. The general chemical formula is A 2 B 2 O 7 , such as gadolinium zirconium (Gd 2 Zr 2 O 7 ) and lanthanum zirconium (La 2 Zr 2 O 7 ) pyrochlore 13‐15 . La ion in La 2 Zr 2 O 7 , presented as pyrochlore structure, is surrounded by eight oxygen ions while Zr ion is surrounded by six oxygen ions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of mechanical and thermodynamic properties ofLa₂Zr₂O₇pyrochlore

Wei

Zuo

Luo

et al. 2021

Intl J of Energy Research

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Summary This study investigated the mechanical, thermodynamic properties, and minimum thermal conductivity of La2Zr2O7 material with the assistance of density functional theory. Based on the investigated results, the calculated parameters are close to other reported results. Elastic constants proved that under high pressures, La2Zr2O7 has considerable mechanical stability. Moreover, at 0 and 5 GPa, the calculated outcomes revealed that La2Zr2O7 material is weak anisotropy. The effects of pressure on other properties were also investigated, such as Young's modulus and minimum thermal conductivity. Based on these results, thermodynamic properties of La2Zr2O7 material were obtained through the quasi‐harmonic Debye model. These results show that La2Zr2O7 pyrochlore has mechanical stability and ductility under pressure. This work demonstrated that La2Zr2O7 material has considerable mechanical and thermodynamic properties in the investigated range. Novelty Statement This study investigated the mechanical, thermodynamic properties, and minimum thermal conductivity of La2Zr2O7 material with the assistance of density functional theory. This work demonstrated that La2Zr2O7 material has considerable mechanical and thermodynamic properties. Highlights GGA + U method was used to obtain the lattice parameters and density of La2Zr2O7. La2Zr2O7 pyrochlore is a suitable radioactive waste treatment substrate. La2Zr2O7 pyrochlore has mechanical stability and ductility under pressure

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