Sol–gel synthesis and microwave assisted sintering of zirconia–ceria solid solution

Kumar, K. Ashok; Mathews, Tom

doi:10.1016/j.jallcom.2004.07.077

Cited by 21 publications

(2 citation statements)

References 27 publications

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“…The amorphous to crystalline transition of the Ce−Zr mixed oxides was clearly strongly affected by sample composition since the transition temperature increased as the CeO 2 content decreased. This is in agreement with Suresh Kumar et al The MS data confirmed that H 2 O is the main product released in the first exothermic peak with only traces of NO x , while NO x , CO, and CO 2 are the main gases liberated during the second peak. It is possible to clearly identify three steps in the TGA curves.…”

Section: Resultssupporting

confidence: 91%

Synthesis of Nanocrystalline CeO₂−ZrO₂ Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study

Fuentes

Baker

2008

J. Phys. Chem. C

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The synthesis of nanocrystalline solid solutions of general formula Ce x Zr1−x O2 (x = 0.1, 0.25, 0.5, 0.75, and 0.9) using a citrate complexation technique was followed with thermochemical methods, and the resulting powders were characterized using X-ray diffraction (XRD) and electron microscopy (scanning electron microscopy and high-resolution transmission electron microscopy (HRTEM)). Qualitative analysis of XRD data indicated that the samples exhibited either a cubic (Fm3m) or a tetragonal (P42/nmc) phase, depending on CeO2 content. Electron diffraction results were consistent with the XRD findings. In HRTEM, the internal crystal structure of the nanoparticles was observed to be highly ordered and primary particle size data were collected. Average crystallite size, obtained from the XRD data, was 4.8−8.3 nm, with the larger values at the compositional extremes. A similar trend was observed in HRTEM, although values were generally slightly higher. The Ce0.5Zr0.5O2 solid solution had the smallest crystallites (4.8 nm) and the highest specific surface area (45.8 m2·g−1).

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Section: Resultssupporting

confidence: 91%

Synthesis of Nanocrystalline CeO₂−ZrO₂ Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study

Fuentes

Baker

2008

J. Phys. Chem. C

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“…Even for high dielectric loss factor ZrO 2 , 91,92 microwave sintering only achieves 92% theoretical density after 1 h holding and the resultant grain size is greater than 100 nm. 93 TiO 2 nanoparticles are sintered at 50uC min 21 and 100uC min 21 heating rates and significant grain growth is observed at .92% density. 89 Si 3 N 4 nanoparticles of 25 nm size exhibit the same behavior.…”

Section: Microwave Sinteringmentioning

confidence: 99%

Sintering of nanoceramics

2008

International Materials Reviews

153

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There are two challenges in nanoceramic sintering: fully densifying the sintered body and maintaining the sintered grains at ,100 nm size. This review examines the fundamental factors underlying nanoceramic sintering and the approaches to effectively utilise the sintering factors to advantage. Nanoceramic sintering techniques are divided into four categories: pressureless sintering, pressure sintering, electrically assisted sintering, and other sintering related techniques. Pressureless sintering has mainly evolved around modifying sintering schedules, improving nanoparticle packing characteristics, and using additives to tailor the diffusion rates. Pressure sintering, which includes hot pressing, hot isostatic pressing, and sinter forging, can effectively achieve full densification for nanostructured ceramics but microstructural inhomogeneity and sintered shape limitation are difficult to overcome. For electrically assisted sintering, many nanoceramics have been sintered to full density with spark plasma even though the atomic diffusion process is not well understood; microwave sintering can achieve fast heating but has limited ability in reaching full density or controlling grain growth. Plasma spray forming and dynamic compaction are drastically different from the mainstream sintering concepts and so are briefly reviewed. Finally, the remaining issues in nanoceramic sintering are summarised and the future directions are projected.

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Synthesis of cerium oxide nanoparticles by microwave technique using propylene glycol as a stabilizing agent

Shirke

Patil

Hankare

et al. 2010

J Mater Sci: Mater Electron

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Sol–gel synthesis and microwave assisted sintering of zirconia–ceria solid solution

Cited by 21 publications

References 27 publications

Synthesis of Nanocrystalline CeO₂−ZrO₂ Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study

Synthesis of Nanocrystalline CeO₂−ZrO₂ Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study

Sintering of nanoceramics

Synthesis of cerium oxide nanoparticles by microwave technique using propylene glycol as a stabilizing agent

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Sol–gel synthesis and microwave assisted sintering of zirconia–ceria solid solution

Cited by 21 publications

References 27 publications

Synthesis of Nanocrystalline CeO2−ZrO2 Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study

Synthesis of Nanocrystalline CeO2−ZrO2 Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study

Sintering of nanoceramics

Synthesis of cerium oxide nanoparticles by microwave technique using propylene glycol as a stabilizing agent

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Synthesis of Nanocrystalline CeO₂−ZrO₂ Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study

Synthesis of Nanocrystalline CeO₂−ZrO₂ Solid Solutions by a Citrate Complexation Route: A Thermochemical and Structural Study