Sintering and properties of nanosized ceria solid solutions

Kleinlogel, C.

doi:10.1016/s0167-2738(00)00437-9

Cited by 332 publications

(219 citation statements)

References 14 publications

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“…A similar phenomenum is observed by Dong et al, 18 and Kleinlogel, Gauckler 19 which is attributed to a liquid phase formed between the sintering additive and the matrix in nanosized ceria solid solutions. It has already been proposed by Liu, Lao 15 that the sintering mechanism when using ZnO as sintering additive is viscous flux, but it was not found any data about liquid formation neither between ZnO and ZrO 2 20 nor between ZnO and Y 2 O 3 .…”

Section: Resultssupporting

confidence: 79%

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Marcomini

Souza

2016

Mat. Res.

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Adding ZnO reduces sintering temperature of yttria stabilized zirconia. Adding up to 0.5 wt% of ZnO is possible to densify to 8 mol% yttria stabilized zirconia (TZ8Y) to 95% of relative density at 1300 °C, besides, the electrical conductivity increases about 30% at 800 °C when compared to pure TZ8Y with the same relative density and average grain size. These results show that TZ8Y co-doped with ZnO can be a potential electrolyte to solid oxide fuel cells and electrolyzer cells.

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Section: Resultssupporting

confidence: 79%

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Marcomini

Souza

2016

Mat. Res.

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“…Rare-earth-doped ceria is considered as a promising candidate material for use at intermediate or even lower temperatures, due to their higher oxygen ion conductivity compared with the traditional YSZ within similar temperature range. 3,4 Enhancement of ionic conductivity in doped ceria used in IT-SOFCs has thereby attracted intense interests. The doped aliovalent cations, associated with the charge-compensation oxygen vacancies, will lead to defect structure formation in ceria fluorite lattice, which permits high oxygen ion conduction.…”

Section: Introductionmentioning

confidence: 99%

Ordered structures of defect clusters in gadolinium-doped ceria

Mori

et al. 2011

The Journal of Chemical Physics

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The nano-domain, with short-range ordered structure, has been widely observed in rare-earth-doped ceria. Atomistic simulation has been employed to investigate the ordering structure of the nano-domain, as a result of aggregation and segregation of dopant cations and the associated oxygen vacancies in gadolinium-doped ceria. It is found that the binding energy of defect cluster increases as a function of cluster size, which provides the intrinsic driving force for the defect cluster growth. However, the ordered structures of the defect clusters are different from the chain model as previously reported. Adjacent oxygen vacancies prefer to locate along 〈110〉/2 lattice vector, which results in a unique stable structure (isosceles triangle) formation. Such isosceles triangle structure can act as the smallest unit of cluster growth to form a symmetric dumbbell structure. This unique dumbbell structure is hence considered as a building block for the development of larger defect clusters, leading to nano-domain formation in rare-earth-doped ceria.

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“…Nanocrystalline cerium oxide improves catalytic properties significantly, leading to higher conversion of carbon monoxide to dioxide and sulfur dioxide to elemental sulfur at lower temperatures. The improved catalytic reactivity was also demonstrated in the oxidation of methane [51][52][53]. The sinterability of crystalline cerium oxide increases with decreasing particle size.…”

Section: Electrochemical Synthesis Of Cerium Oxidesmentioning

confidence: 85%

“…The sinterability of crystalline cerium oxide increases with decreasing particle size. The reduction of sintering temperature for nanocrystalline cerium oxide overcomes processing temperature difficulty and makes it a promising candidate as an electrolyte in solid oxide fuel cells [52,53]. Ceria can also be used for corrosion protection on a number of different substrates [54][55][56].…”

Section: Electrochemical Synthesis Of Cerium Oxidesmentioning

confidence: 99%

Electrochemical Synthesis of Rare Earth Ceramic Oxide Coatings

Golden¹,

Shang²,

Wang³

et al. 2015

Advanced Ceramic Processing

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Rare earth ceramic oxides are used in several applications including, phosphors, gas sensors, fuel cells, catalytic converters, and corrosion protection. These materials exhibit attractive properties such as fracture toughness, stiffness, and high strengthto-weight ratios. Synthesis of rare earth oxides includes a long list of techniques, but electrodeposition is one that has not been used as extensively as other techniques. This chapter discusses in detail the electrochemical synthesis of lanthanum, cerium, and praseodymium oxides. The physical and chemical properties of the electrodeposited oxides are characterized by x-ray diffraction, scanning electron microscopy, x-ray photoelectron spectroscopy, and other techniques. The electrochemical synthesis and post-treatment of other rare earth oxides, such as gadolinium, terbium, samarium, neodymium, europium, and dysprosium oxides are also covered in this chapter. Two main mechanisms of electrodeposition for rare earth oxides are discussed in detail.

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Sintering and properties of nanosized ceria solid solutions

Cited by 332 publications

References 14 publications

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive

Ordered structures of defect clusters in gadolinium-doped ceria

Electrochemical Synthesis of Rare Earth Ceramic Oxide Coatings

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