Effect of high alumina cement on permeability and structure properties of ZrO2 composites

Bruni, Yésica Lorena; Garrido, Liliana B.; Aglietti, E.F.

doi:10.1016/j.ceramint.2011.10.030

Cited by 7 publications

(4 citation statements)

References 18 publications

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“…(4) to experimental data [16] may provide the information required to the computation, by means of CFD codes, on the volume-averaged momentum and mass conservation equations in the porous zone. In fact, the assumption of constant coefficients is not strictly valid for all cases, since, as previously mentioned, some authors [20,21,28] have reported that other flow regimes, which differ from those observed by Darcy and Forchheimer, may develop as the velocity of the fluid increases.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…In particular, Forchheimer's equation has been extensively used to predict the pressure drop in ceramic filters [13][14][15][16][17]. However, although there is a consensus concerning the nature of the linear term, provided by Darcy's law and assumed to be only a function of the material structure, the quadratic term has been the subject of divergent reports in the literature.…”

Section: Introductionmentioning

confidence: 97%

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Evaluation of resistances to fluid flow in fibrous ceramic medium

Soares

Padoin

Müller

et al. 2015

Applied Mathematical Modelling

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Evaluation of resistances to fluid flow in fibrous ceramic medium

Soares

Padoin

Müller

et al. 2015

Applied Mathematical Modelling

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“…The monoclinic modification of ZrO 2 nanopowders is used mostly in the production of substrates for luminescent, photosensitive materials [112]; in catalysis [113,114]; and in the production of nanomaterials based on tetragonal and cubic ZrO 2 modifications, for example, in ceramic materials, including new materials with improved performance [115]. The tetragonal modification of zirconium (IV) oxide has become widely used for bioceramics in restorative dentistry [116,117] and in catalysis [118,119], and its cubic modification has become widely used for chemically resistant and thermostable high-strength nanoceramics [120] and for solid electrolytes in solid oxide fuel cells [121,122].…”

Section: Properties Of Metal Oxides In the Different States Ofmentioning

confidence: 99%

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Dontsova

Nahirniak

Астрелін

2019

Journal of Nanomaterials

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The features of the properties and creation of nanocomposite metal oxide materials, especially TiO2, ZnO, SnO2, ZrO2, and Fe3O4, and their applications for ecology are considered in the article. It is shown that nanomaterials based on them are very promising for use in the ecological direction, especially as sorbents, photocatalysts, and sensitive layers of gas sensors. The crystallochemical characteristics, surface structure, and surface phenomena that occur when they enter the water and air environment are given for these metal oxides, and it is shown that they play a significant role in obtaining the sorption and catalytic characteristics of these nanomaterials. Particular attention is paid to the dispersion and morphology of metal oxide particles by which their physical and chemical properties can be controlled. Synthesis methods of metal oxide nanomaterials and ways for creating of nanocomposites based on them are characterized, and it is noted that there are many methods for obtaining individual nanoparticles of metal oxides with certain properties. The main task is the correct selection and testing of parameters. The prospects for the production of metal oxide nanocomposites and their application for environmental applications are noted, which will lead to a fundamentally new class of materials and new environmental technologies with their participation.

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“…One important disadvantage of macro/mesoporous ceramic supports is their high cost that impedes large scale deployment of thermally stable ceramic/zeolite/MOF membranes. Silica, zirconia, titania, and alumina or their composites are generally used as the membrane support materials (9)(10)(11)(12)(13). The supports must be highly porous so the molecules that were released through the membrane layer can also easily pass through the supports without any resistant.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Al2O3 Supports for Thin Membrane Fabrication

Topuz¹,

Yurttaş²,

Altunsoy³

2017

Journal of the Turkish Chemical Society, Section A: Chemistry

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Abstract:In this study, macroporous -alumina supports were prepared by using vacuum assisted filtration of α-Al2O3 suspensions with different particle size. The average particle sizes of the powders are 400 and 200 nm. The prepared supports had smooth and uniform surface microstructure and well suited for the fabrication of thin continuous membrane. The microstructure consists of a random close-packing of 200 nm particles led to improved surface uniformity and roughness. ZnO spheres were prepared by homogeneous precipitation and added to the colloidal suspension to modify the support structure and increase the support flux. Structural parameters such as pore diameter and tortuosity of the prepared macroporous supports were estimated by using He, N2, CO2 permeance measurements. Slight pressure dependence in the permeance values indicated the contribution of viscous flow to the Knudsen flow. The supports prepared by alumina powder with a larger particle size exhibited a He permeance of three times higher than that of prepared with a smaller particle size. The addition of ZnO resulted in the increase in He permeance value significantly for the support prepared by 400 nm particles in size. He permeance was in a range of 8.5-8.7x10 -6 mol/(m 2 sPa) which is very close to the desired value of 1x10 -5 mol/(m 2 sPa).

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Effect of high alumina cement on permeability and structure properties of ZrO2 composites

Cited by 7 publications

References 18 publications

Evaluation of resistances to fluid flow in fibrous ceramic medium

Evaluation of resistances to fluid flow in fibrous ceramic medium

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Preparation of Al2O3 Supports for Thin Membrane Fabrication

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