Macroporous Ceramics by Gelation–Freezing Route Using Gelatin

Fukushima, Manabu; Yoshizawa, Yu‐ichi; Ohji, Tatsuki

doi:10.1002/adem.201400067

Cited by 52 publications

(33 citation statements)

References 148 publications

(255 reference statements)

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“…On the other hand, the result was attribute to the amount and size of the cracks between the aggregates and matrixes. Ohji et al 17) reported that the compressive strength was associated with the pore morphologies. The strength of the cellular morphologies was higher than that of the lamellar, because the pore size of the cellular structures was much smaller than that of the lamellar.…”

Section: )mentioning

confidence: 99%

Effects of particle size of Al(OH)<sub>3</sub> on the properties of porous purging materials

Wang

et al. 2017

J. Ceram. Soc. Japan

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Porous purging plug is promising in the course of steel-making especially for producing the pure steel. Five designed castables containing the same aggregates and different matrixes were fabricated successfully. Air permeability tests, microstructural characterization and grey incidence analysis were carried out to analyze the particle size of aluminum hydroxide [Al(OH) 3 ] effects on the properties of porous purging materials. According to the attained results, the smaller particle size of Al(OH) 3 seemed to be suitable to improve the properties of such materials, as it induced the formation of connected pores and hot modulus of rupture changed slightly. When the particle size was 36.1¯m, the air permeability could reach 13.4¯m 2 . Moreover, the grey incidence analysis matched to the experimental observations, attesting the smaller particle sizes (1020¯m) were helpful for enhancing the air permeability while the bigger particle sizes (²100¯m) had the opposite effects.

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Section: )mentioning

confidence: 99%

Effects of particle size of Al(OH)<sub>3</sub> on the properties of porous purging materials

Wang

et al. 2017

J. Ceram. Soc. Japan

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“…Although a few review papers [1–6] have been published, they mostly focus on the underlying principles. Little can be found on the range of properties that could be achieved.…”

Section: Introductionmentioning

confidence: 99%

A meta-analysis of the mechanical properties of ice-templated ceramics and metals

Deville

Meille

Seuba

2015

Science and Technology of Advanced Materials

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Ice templating, also known as freeze casting, is a popular shaping route for macroporous materials. Over the past 15 years, it has been widely applied to various classes of materials, and in particular ceramics. Many formulation and process parameters, often interdependent, affect the outcome. It is thus difficult to understand the various relationships between these parameters from isolated studies where only a few of these parameters have been investigated. We report here the results of a meta analysis of the structural and mechanical properties of ice templated materials from an exhaustive collection of records. We use these results to identify which parameters are the most critical to control the structure and properties, and to derive guidelines for optimizing the mechanical response of ice templated materials. We hope these results will be a helpful guide to anyone interested in such materials.

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“…The gelatin-gelation-freezing route has been reported to produce macroporous ceramics with honeycomb-like and non-dendritic pore structures (Fukushima et al 2014). The rational of using gelatin as a binder in the titanium alloy slurries is to alleviate the sedimentation problem of coarse and dense titanium alloy particles during the freeze casting process, with the physically crosslinked gelatin able to hold the particles from fast sedimentation.…”

Section: Introductionmentioning

confidence: 99%

Gelatin freeze casting of biomimetic titanium alloy with anisotropic and gradient pore structure

et al. 2017

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Abstract. Titanium metal and its alloys are materials commonly used for dental and orthopaedic implants. However, due to large difference in properties between the titanium metal and the natural bone, stress shielding has been observed around the surround area, resulting in bone atrophy, and thus has raised concerns of the use of this material. Ideally implant materials should possess similar properties to the surrounding tissues in order to distribute the load as the joint would naturally, while also possessing a similar porous structure to the bone to enable interaction with the surrounding material. In this paper we report the formation of aligned porous titanium alloy scaffolds with the use of unidirectional freeze casting with a temperature gradient. The resulting scaffolds had a dense bottom part with sufficient strength for loading, while the top part remaining porous in order to allow bone growth in the scaffold and fully integrating with the surrounding tissue. The anisotropic nature of the pores within the titanium alloy samples were observed via micro computed tomography, where a gradient structure similar to bone was observed. The compressive strength of the fabricated scaffolds was found to be up to 427 MPa when measured with the pores aligned with the applied load, depending on the pore density. This is within the range of cortical bone.

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Macroporous Ceramics by Gelation–Freezing Route Using Gelatin

Cited by 52 publications

References 148 publications

Effects of particle size of Al(OH)<sub>3</sub> on the properties of porous purging materials

Effects of particle size of Al(OH)<sub>3</sub> on the properties of porous purging materials

A meta-analysis of the mechanical properties of ice-templated ceramics and metals

Gelatin freeze casting of biomimetic titanium alloy with anisotropic and gradient pore structure

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