Eco-friendly processing and methods for ceramic materials - A review

Duran, Cihangir; Sato, Kimiyasu; Hotta, Yuji; Nagaoka, Takaaki

doi:10.2109/jcersj2.116.1175

Cited by 12 publications

(7 citation statements)

References 70 publications

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“…It has been reported and proven that the mechanochemical activation in high energy ball milling consists of a suitable pretreatment of raw materials to obtain dense ceramics. Its effect is to activate the chemical and physical processes by incorporating surface energy powders that are usually nanosized, thus effectively achieving homogeneous mixtures of powders even of different sizes [25][26][27][28][29]. Sintering is one of these activated processes.…”

Section: Introductionmentioning

confidence: 99%

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

Gauna¹,

Conconi²,

Suárez

et al. 2018

SCI SINTER

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In this work, a simple milling sintering route (pressure less) to process dense zircon ceramics from fine (D 50 0.8 µm) zircon powders is explored. Particularly, the milling time effect (0-120 min) and the maximum sintering temperature (1400-1600 °C) were studied. The sintering grade developed microstructure and Vickers hardness (Hv) were evaluated and correlated. The dissociation of silicate into (monoclinic and tetragonal) zirconia and silica was evaluated by X-ray diffraction followed by the Rietveld method; it was found to be below 10 wt% in all the studied ranges. The sintering was enhanced by the milling pretreatment. No sintering additives were incorporated. Dense zircon (porosity below 1 %) ceramics were obtained by a simple millingsintering route of this high refractory powder at 100-200 °C below the sintering temperature used with conventional processing routes to obtain equivalent final properties. The Vickers hardness reached: 9.0 GPa.

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Section: Introductionmentioning

confidence: 99%

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

Gauna¹,

Conconi²,

Suárez

et al. 2018

SCI SINTER

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“…[11] In this sense, Pb(Zr,Ti)O 3 -based piezoceramics should be recycled and reused to the greatest possible extent, ideally via energy-and environmentally friendly approaches, before being permanently disposed. [12][13][14] In terms of the recycling method, a recently developed concept of making upside-down ceramic-ceramic composites via the ultralow-temperature densification mechanism is a promising candidate. Such composite materials adopt exceptionally high filler content with multimodal particle sizes (the majority being >100 μm) and much lower binder (inversed matrix) content compared to that in a conventional composite, namely, "'upsidedown"'.…”

Section: Introductionmentioning

confidence: 99%

Oxide‐Halide Perovskite Composites for Simultaneous Recycling of Lead Zirconate Titanate Piezoceramics and Methylammonium Lead Iodide Solar Cells

Tabeshfar,

Nelo,

Anandakrishnan

et al. 2023

Small Methods

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Global concerns over energy availability and the environment impose an urgent requirement for sustainable manufacturing, usage, and disposal of electronic components. Piezoelectric and photovoltaic components are being extensively used. They contain the hazardous element, Pb (e.g., in widely used and researched Pb(Zr,Ti)O3 and halide perovskites), but they are not being properly recycled or reused. This work demonstrates the fabrication of upside‐down composite sensor materials using crushed ceramic particles recycled from broken piezoceramics, polycrystalline halide perovskite powder collected from waste dye‐sensitized solar cells, and crystal particles of a Cd‐based perovskite composition, C6H5N(CH3)3CdBr3xCl3(1–x). The piezoceramic and halide perovskite particles are used as filler and binder, respectively, to show a proof of concept for the chemical and microstructural compatibility between the oxide and halide perovskite compounds while being recycled simultaneously. Production of the recycled and reusable materials requires only a marginal energy budget while achieving a very high material densification of >92%, as well as a 40% higher piezoelectric voltage coefficient, i.e., better sensing capability, than the pristine piezoceramics. This work thus offers an energy‐ and environmentally friendly approach to the recycling of hazardous elements as well as giving a second life to waste piezoelectric and photovoltaic components.

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“…Among the several actions that may contribute to achieving the abovementioned goals, the use of low-toxicity materials and recycling plays a major role [1]. With regard to ceramic processing, environmental impacts may be reduced in many ways, such as the development of rapid sintering processes, new additives to decrease the temperature of powder synthesis, replacement of toxic organic solvents used in forming methods (such as tape casting and powder injection molding) by aqueous systems, development of manufacturing routes with fewer steps, and elimination or reduction of organic binders (e.g., PVA, PEG, PMMA, and PVB) [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion

Lima

Tercini

Santos

et al. 2017

Journal of Nanomaterials

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The in situ formation of nanostructured aluminum hydroxides on the surface of alumina particles, which can work as inorganic binder, was reported in this paper. The effect of the suspension pH during milling of alumina powder and subsequent hydrothermal treatment for the hydroxide formation and microstructure was depicted. Under acidic pH condition, the formation of hydroxides was not observed. When the pH of suspension changed from acidic to basic during milling, bayerite [Al(OH) 3 ] nanoparticles were formed, but only a fraction of this hydroxide was converted to boehmite (AlOOH) during subsequent hydrothermal treatment. The aluminum hydroxide and oxyhydroxide formed in this condition improved the smoothness of extruded rods and the strength of presintered segments. For the powder milled under basic pH condition, the mechanochemically formed bayerite was completely converted into boehmite nanoparticles during the hydrothermal treatment. The presence of boehmite nanoparticles contributed to improving plasticity during extrusion, which allowed the reduction of organic binder and increased the strength of presintered alumina rods.

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Eco-friendly processing and methods for ceramic materials - A review

Cited by 12 publications

References 70 publications

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

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

Oxide‐Halide Perovskite Composites for Simultaneous Recycling of Lead Zirconate Titanate Piezoceramics and Methylammonium Lead Iodide Solar Cells

Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion

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