Dense zircon (ZrSiO4) ceramics by a simple milling-sintering route

Gauna, M.R.; Conconi, María Susana; Suárez, Gustavo; Aglietti, E.F.; Rendtorff, Nicolás M.

doi:10.2298/sos1801015g

Cited by 17 publications

(21 citation statements)

References 29 publications

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“…The derivative curve of the TG (DTG) was also employed for this purpose. To understand the sintering behavior, thermomechanical analysis on a vertical prismatic (20.0 x 3.5 x 3.5 mm 3 ) sample was performed; with a 10 °C/min heating rate in air atmosphere (TMA Rigaku Evo plus II, Japan) [25,26].…”

Section: Bauxite -Gd 2 O 3 Mixtures Characterizationsmentioning

confidence: 99%

High macroscopic neutron capture cross section ceramics based on bauxite and Gd2O3

et al. 2020

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The effect of the addition of Gadolinium oxide (Gd2O3) up to 10 wt.% in bauxite was studied and its thermal behavior compared with pure bauxite. The incorporation of Gd2O3 is of technological interest for the design of smart traceable ceramic proppants used for unconventional gas and oil well stimulation. These high macroscopic neutron capture cross section proppants are used to obtain relevant information, such as the location and height of the created hydraulic fractures, through a neutron based detection technology. The study comprised a set of thermal and sintering behavior analyses up to 1500 ?C of mixtures up to 10 wt.% addition of Gd2O3. The developed texture and microstructure was also assessed. A simple mechanical characterization was performed as well. Fully-dense pore-free microstructures were developed, with alumina and mullite as the main crystalline phases. Gadolinium secondary and ternary alumino-silicate phases were also observed after thermal treatment. These present a needle morphology that might result in reinforcement mechanisms. No important glassy phase was detected; although sintering was enhanced, the Gd2O3 oxide main role was found to be as a sintering aid rather than a strict flux agent. The mechanical behavior remained fragile with the rare oxide addition. In fact, the mechanical resistance increased up to 20 wt.% for the 10 wt.% added sample. The oxide addition together with the bauxite dehydroxilation mass loss resulted in materials with up to 1.5 x 105 (c.u.) macroscopic neutron capture cross section materials. The obtained results permit to define design strategies of high macroscopic neutron capture ceramic materials for wellbore and developed fractures description.

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Section: Bauxite -Gd 2 O 3 Mixtures Characterizationsmentioning

confidence: 99%

High macroscopic neutron capture cross section ceramics based on bauxite and Gd2O3

et al. 2020

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“…Design of cordierite-based refractory coatings and choice of production method were carried out in accordance with the analysis of the influence of mechanical activation of non-metallic mineral raw materials on the filler's quality, i.e. on the grain size and shape of the filler, according to the works [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Influence of mechanical activation of a cordierite -based filler on sedimentation stability of lost foam refractory coatings

Pavlović¹,

Andrić

Radulović

et al. 2019

Sci Sintering

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For the development of the Lost Foam refractory coatings with controlled rheologic properties, the influence of the mechanical activation process on the cordierite-based filler's properties change was examined. First of all, the test referred to the change of filler particles' size and shape, as well as to dispersion ability and stability of the coating suspension. Cordierite was obtained by synthesis in a solid state, out of the mass consisting of kaoline, alumina, quartz, sepiolite. For characterization purposes, the following methods were used: X-ray diffraction, differential thermal analysis, SEM and optical microscopy. Mechanical activation of filler was performed in a vibrating mill. The upper boundary of the grain size was 100%-30 x 10-6 m, the times were (min): 15; 30; 60. The new composition of Lost foam refractory coatings has been developed with a change of the coating production process, as well. These newly synthesized coatings proved to be effective in terms of a positive influence on a surface quality, structural and mechanical properties of aluminium castings. Test results may be useful to have the Lost Foam refractory coatings specified together with other process parameters used for the production of castings according to this casting method.

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“…Final properties of ceramic materials are signed by the processing route, where, for example, in order to obtain full dense materials it is necessary to increase the sintering temperature or time, for porosity to be eliminated and grain growth to occur [17,18]. Different techniques have been performed in order to obtain dense LSO materials from synthesized powders, as uniaxial pressing, electrophoretic deposition or plasma spraying [12][13][14] Each technique comes with its own pros and cons for different applications.…”

Section: Introductionmentioning

confidence: 99%

Dense lanthanum silicate oxyapatite ceramics obtained by uniaxial pressing and slip casting

Toja¹,

Rendtorffa

Agliettia

et al. 2018

SCI SINTER

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Lanthanum silicate oxyapatite (LSO) is a promising ion conductive ceramic material, which has higher oxygen ion conductivity at intermediate temperatures (600-800 °C) compared to yttria-stabilized zirconia. Its mechanical properties, though important for any of its applications, have been scarcely reported. In this study, we compare apparent densification, open porosity and Vickers hardness of samples conformed by uniaxial pressing and slip casting and fired up to 1600 °C. Colloidal processing was optimized for slip casting in order to get high green densities. At sintering temperatures higher than 1400 ºC, both processing routes yielded comparable densities, although uniaxially pressed samples show slightly better mechanical properties, evidencing that slip cast ones already underwent a grain growth process.

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Dense zircon (ZrSiO4) ceramics by a simple milling-sintering route

Cited by 17 publications

References 29 publications

High macroscopic neutron capture cross section ceramics based on bauxite and Gd2O3

High macroscopic neutron capture cross section ceramics based on bauxite and Gd2O3

Influence of mechanical activation of a cordierite -based filler on sedimentation stability of lost foam refractory coatings

Dense lanthanum silicate oxyapatite ceramics obtained by uniaxial pressing and slip casting

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