Formation characterization and rheological properties of zirconia and ceria-stabilized zirconia

Nikumbh, A.K.; Adhyapak, Parag V.

doi:10.4236/ns.2010.27086

Cited by 7 publications

(3 citation statements)

References 48 publications

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“…Titanyl dicarboxylates and barium titanyl dicarboxylates were prepared according to a procedure described in the literature (Nikumbh & Adhyapak, 2010a, 2010b.…”

Section: Methodsmentioning

confidence: 99%

Influence of preparation route and slip casting conditions on titania and barium titanate ceramics

Nikumbh

Adhyapak

2012

Particuology

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“…Titanyl dicarboxylates and barium titanyl dicarboxylates were prepared according to a procedure described in the literature (Nikumbh & Adhyapak, 2010a, 2010b.…”

Section: Methodsmentioning

confidence: 99%

Influence of preparation route and slip casting conditions on titania and barium titanate ceramics

Nikumbh

Adhyapak

2012

Particuology

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“…Casting process involves dispersing the porous powders in a liquid or polymer with dispersant, plasticizer, binder, and/or antifoaming agent, then mixing and deagglomerating them using ball milling or high shear mixer. [ 38 ] Slip casting is normally performed using Newtonian suspensions with an adapted solid loading for which the colloidal and rheological properties must be optimized. Nevertheless, materials containing organic compounds such as MOFs, COFs, and carbonaceous can hardly be prepared by the methods mentioned above.…”

Section: Conventional Manufacturing Approachesmentioning

confidence: 99%

An Overview on 3D Printing of Structured Porous Materials and Their Applications

Gao

Lalevée

Simon‐Masseron

2023

Adv Materials Technologies

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Porous materials play an essential role in chemical processes such as catalysis, adsorption, and in emerging technologies for electronic materials, light harvesting, and energy transfer. By far, zeolites have contributed most to industrial development. Other porous solid such as activated carbon, metal–organic frameworks, covalent organic frameworks, and porous coordination polymers also have been studied by researchers in the past two decades. The use of porous solids is set to grow in the future, and so is the need to fabricate them into more complex and diverse geometries for a variety of applications. Additive manufacturing, also known as 3D printing, has provided the possibility to shape the materials into desired forms, which offers many advantages over their traditional configurations. Structured catalysts, for example, can help to overcome the drawbacks of conventional packed catalyst bed‐like mass or heat transfer limitations and high pressure drop. This review focuses on the latest advances as well as the current challenges in 3D printing of the porous solids. This article aims to contribute to the shape engineering of porous solids and provide a better understanding of their formulations, structures, techniques, properties, and applications.

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“…Tetragonal phase yttria-stabilized zirconia (Y-TZP) has been used in various medical applications since the 1980s, particularly for dental crowns [2]. In addition, bulk materials and nanocomposites based on ZrO 2 are used in electrochemical cells because of their high oxide ion conductivity and catalytic activity, low thermal conductivity, mechanical/chemical stability, and compatibility with electrolytes, which make them structurally advantageous [3,4].…”

Section: Introductionmentioning

confidence: 99%

A Detailed Comparative Analysis of the Structural Stability and Electron-Phonon Properties of ZrO2: Mechanisms of Water Adsorption on t-ZrO2 (101) and t-YSZ (101) Surfaces

Nematov,

Burhonzoda,

Kholmurodov

et al. 2023

Nanomaterials

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In this study, we considered the structural stability, electronic properties, and phonon dispersion of the cubic (c-ZrO2), tetragonal (t-ZrO2), and monoclinic (m-ZrO2) phases of ZrO2. We found that the monoclinic phase of zirconium dioxide is the most stable among the three phases in terms of total energy, lowest enthalpy, highest entropy, and other thermodynamic properties. The smallest negative modes were found for m-ZrO2. Our analysis of the electronic properties showed that during the m–t phase transformation of ZrO2, the Fermi level first shifts by 0.125 eV toward higher energies, and then decreases by 0.08 eV in the t–c cross-section. The band gaps for c-ZrO2, t-ZrO2, and m-ZrO2 are 5.140 eV, 5.898 eV, and 5.288 eV, respectively. Calculations based on the analysis of the influence of doping 3.23, 6.67, 10.35, and 16.15 mol. %Y2O3 onto the m-ZrO2 structure showed that the enthalpy of m-YSZ decreases linearly, which accompanies the further stabilization of monoclinic ZrO2 and an increase in its defectiveness. A doping-induced and concentration-dependent phase transition in ZrO2 under the influence of Y2O3 was discovered, due to which the position of the Fermi level changes and the energy gap decreases. It has been established that the main contribution to the formation of the conduction band is made by the p-states of electrons, not only for pure systems, but also those doped with Y2O3. The t-ZrO2 (101) and t-YSZ (101) surface models were selected as optimal surfaces for water adsorption based on a comparison of their surface energies. An analysis of the mechanism of water adsorption on the surface of t-ZrO2 (101) and t-YSZ (101) showed that H2O on unstabilized t-ZrO2 (101) is adsorbed dissociatively with an energy of −1.22 eV, as well as by the method of molecular chemisorption with an energy of −0.69 eV and the formation of a hydrogen bond with a bond length of 1.01 Å. In the case of t-YSZ (101), water is molecularly adsorbed onto the surface with an energy of −1.84 eV. Dissociative adsorption of water occurs at an energy of −1.23 eV, near the yttrium atom. The results show that ab initio approaches are able to describe the mechanism of doping-induced phase transitions in (ZrO2+Y2O3)-like systems, based on which it can be assumed that DFT calculations can also flawlessly evaluate other physical and chemical properties of YSZ, which have not yet been studied quantum chemical research. The obtained results complement the database of research works carried out in the field of the application of biocompatible zirconium dioxide crystals and ceramics in green energy generation, and can be used in designing humidity-to-electricity converters and in creating solid oxide fuel cells based on ZrO2.

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Formation characterization and rheological properties of zirconia and ceria-stabilized zirconia

Cited by 7 publications

References 48 publications

Influence of preparation route and slip casting conditions on titania and barium titanate ceramics

Influence of preparation route and slip casting conditions on titania and barium titanate ceramics

An Overview on 3D Printing of Structured Porous Materials and Their Applications

A Detailed Comparative Analysis of the Structural Stability and Electron-Phonon Properties of ZrO2: Mechanisms of Water Adsorption on t-ZrO2 (101) and t-YSZ (101) Surfaces

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