Zirconia: A Review of a Super Ceramic

Srinivasan, Ram; Davis, Burtron H.

doi:10.1007/978-1-4899-0145-3_8

Cited by 13 publications

(8 citation statements)

References 76 publications

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“…Zirconia is an exceptionally important technological ceramic with a variety of applications including use as a tough engineering material, − a highly durable catalyst , and catalyst support, − and an oxygen conducting solid electrolyte membrane, used in fuel cells, , oxygen separators, and oxygen sensors. , As a result there have been extensive studies of its chemical and physical properties. The phase behavior of zirconia is complex, and the key crystallographic parameters of zirconia are summarized in Table .…”

Section: Introductionmentioning

confidence: 99%

An EXAFS Study of Nanocrystalline Yttrium Stabilized Cubic Zirconia Films and Pure Zirconia Powders

Rush¹,

Chadwick²,

Kosacki³

et al. 2000

J. Phys. Chem. B

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Detailed EXAFS (extended X-ray absorption fine structure spectroscopy) measurements have been collected for two nanocrystalline forms of zirconia, namely, dense films of yttria-stabilized cubic zirconia (YSZ) and tetragonal phase powders of pure ZrO 2 . Zr and Y K edge EXAFS spectra for the YSZ films with grain sizes of 6, 15, and 240 nm showed no major differences with the corresponding spectra of the bulk counterpart. This is clear proof that these nanocrystalline films exhibit similar levels of disorder to that of large crystals. In particular, there is no support for the view that the intergrain regions are highly disordered, and the present work is consistent with recent EXAFS studies of other nanocrystalline oxides (SnO 2 and ZnO) and metals (Cu). The pure nanocrystalline ZrO 2 powders were produced by calcining zirconium hydroxide, a widely used method of synthesising ZrO 2 . The Zr K edge EXAFS of the powders, with grain sizes of 10 and 20 nm, yielded spectra in which the signal was strongly attenuated in comparison to the EXAFS bulk of ZrO 2 . A significant feature is the dramatically reduced amplitude of the second peak in the Fourier transform, which is due to the Zr-Zr correlation. This feature is often interpreted as evidence of high levels of disorder in nanocrystalline materials. However, using the results from other techniques, notably, NMR measurements, it is argued that the samples contained amorphous material due to an incomplete conversion of the hydroxide precursor. Overall, the studies of the two types of nanocrystalline zirconia emphasize the need for careful characterization of the materials prior to the application of techniques such as EXAFS, which provide an average picture of the local structure.

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Section: Introductionmentioning

confidence: 99%

An EXAFS Study of Nanocrystalline Yttrium Stabilized Cubic Zirconia Films and Pure Zirconia Powders

Rush¹,

Chadwick²,

Kosacki³

et al. 2000

J. Phys. Chem. B

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“…Ceria and zirconia are well known and widely investigated for their great interest for industrial applications [1][2][3][4][5][6][7][8][9] . For example, ZrO2 is extensively used in the field of solid oxide fuel cell, microelectronic, luminescent nanoprobe and catalyst [1][2][3][4][5][6] . As for CeO2, it is a major component of the three way catalysts used in automotive exhaust gas treatment [7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

“…Ceria and zirconia are well known and widely investigated for their great potential in industrial applications. − For example, ZrO 2 is extensively used in the field of solid oxide fuel cells, microelectronics, luminescent nanoprobes, and catalysts. − As for CeO 2 , it is a major component of the three-way catalysts used in automotive exhaust gas treatment. − Due to their redox properties, ceria-based materials also have a large capacity for oxygen storage or/and release, which makes them excellent candidates as catalysts for oxidation of volatile organic compounds (VOCs). , VOCs are a major environmental concern, because of their carcinogenic and toxic effects on human health. However, ceria is known to have poor thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous CeO₂–ZrO₂ Oxides for Oxidation of Volatile Organic Compounds

Jonas

Lebeau

Siffert

et al. 2021

ACS Appl. Nano Mater.

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Here, mixed nanostructured ceria/zirconia oxides have been prepared either by wet impregnation on a nanostructured ZrO2 or by co-condensation through an EISA-derived pathway. This latter method and the impregnation on amorphous ZrO2 followed or not by a heating at 480°C lead to a uniform cerium distribution in the zirconia framework and solid solutions are formed. Stabilization of the tetragonal structure of nano ZrO2 with the increase of the cerium content is observed by XRD and Raman spectroscopy. The surface Ce/Zr molar ratio determined by XPS is very closed to the bulk one, calculated from the X-ray fluorescence analysis. On the opposite, the appearance of nano sized ceria particles with the increase of the cerium content, a monoclinic/tetragonal mixture and an enrichment of the surface in cerium are noted if the impregnation is carried out on a nanostructured ZrO2 previously calcined at 480°C. The obtained catalysts have been tested for the oxidation of toluene, used as a model volatile organic compound. The catalytic efficiency of the mixed oxides has also been compared to the one of a pure commercial ceria. Results show that the preparation method has a significant effect on the catalytic properties of the materials. Although pure ceria presents the best activity and selectivity, the nanostructured ZrO2 previously calcined at 480°C and impregnated by 10 mol% of CeO2 is almost as efficient as pure ceria.

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“…Zirconia is a polymorphic, nearly inert ceramic oxide [1] often used in situations requiring high temperature, high wear resistance or compatibility with steels for which it is closely matched in thermal expansion [2]. Its relative chemical inertness, combined with its deployment as a biomaterial makes it a useful choice to explore the relative importance of surface chemical and topographical influences on cell adhesion and development.…”

Section: Introductionmentioning

confidence: 99%

Osteoblast response to zirconia surfaces with different topographies

Herath

Silvio

Evans

2015

Materials Science and Engineering: C

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Zirconia-3 mol% yttria ceramics were prepared with as-sintered, abraded, polished, and porous surfaces in order to explore the attachment, proliferation and differentiation of osteoblast-like cells. After modification, all surfaces were heated to 600°C to extinguish traces of organic contamination. All surfaces supported cell attachment, proliferation and differentiation but the surfaces with grain boundary grooves or abraded grooves provided conditions for enhanced initial cell attachment. Nevertheless, overall cell proliferation and total DNA were highest on the polished surface. Zirconia sintered at a lower temperature (1300°C vs. 1450°C) had open porosity and presented reduced proliferation as assessed by alamarBlue™ assay, possibly because the openness of the pores prevented cells developing a local microenvironment. All cells retained the typical polygonal morphology of osteoblast-like cells with variations attributable to the underlying surface notably alignment along the grooves of the abraded surface.

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Zirconia: A Review of a Super Ceramic

Cited by 13 publications

References 76 publications

An EXAFS Study of Nanocrystalline Yttrium Stabilized Cubic Zirconia Films and Pure Zirconia Powders

An EXAFS Study of Nanocrystalline Yttrium Stabilized Cubic Zirconia Films and Pure Zirconia Powders

Nanoporous CeO₂–ZrO₂ Oxides for Oxidation of Volatile Organic Compounds

Osteoblast response to zirconia surfaces with different topographies

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Zirconia: A Review of a Super Ceramic

Cited by 13 publications

References 76 publications

An EXAFS Study of Nanocrystalline Yttrium Stabilized Cubic Zirconia Films and Pure Zirconia Powders

An EXAFS Study of Nanocrystalline Yttrium Stabilized Cubic Zirconia Films and Pure Zirconia Powders

Nanoporous CeO2–ZrO2 Oxides for Oxidation of Volatile Organic Compounds

Osteoblast response to zirconia surfaces with different topographies

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Nanoporous CeO₂–ZrO₂ Oxides for Oxidation of Volatile Organic Compounds