Protein forming — a novel shaping technique for ceramics

Lyckfeldt, Ola; Brandt, Jesper; Lesca, S.

doi:10.1016/s0955-2219(00)00136-9

Cited by 131 publications

(82 citation statements)

References 1 publication

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“…[36,37] The third consolidation route for aqueous gel casting involves the use of thermoreversible systems that promote the formation of a physical gel by cross-linking of polysaccharides or polymers. The most interesting systems are those based on gelatine, [38] proteins, [16] triblock copolymers, [39,40] and thermoreversible polysaccharides, preferred for the manufacture of dense bodies, and starch, largely employed for the production of porous bodies. [17] Among those polysaccharides, the most widely used are agaroids (agar and agarose) and carrageenan.…”

Section: Prof Rodrigomentioning

confidence: 99%

“…thermal gelation), [14,15] the most characteristic shaping methods being low pressure injection moulding and gel casting for the production of dense bodies, and protein casting and starch consolidation for the manufacture of porous materials. [16,17] Another possible classification considers whether a mould was used during the consolidation or not: [4] The former includes direct-casting methods (such as slip casting) as well as those producing a chemical gel. Chemical gels are substantially stronger than physical gels.…”

Section: Introductionmentioning

confidence: 99%

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Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

2014

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The application of the gelling properties of some polysaccharides in the consolidation of ceramics (gel casting) allows the forming of dense complex-shape samples through colloidal routes. A description of those polysaccharides, their gelling mechanisms (chemical and thermal), and their synergistic interaction with non gelling polysaccharides is revised, as well as their application in the shaping of 3D (bulk) and 2D (substrates, coatings, and laminates) ceramics. The materials obtained by this methodology show both homogeneous microstructures and high green mechanical strengths, which make possible the machining in the green state, with the corresponding costs reduction.

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Section: Prof Rodrigomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

2014

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“…When this happens, the hydrogen bonds break, and the proteins form 3D metastable structures that interact with each other by intermolecular interactions of the amino acid sidechains, leading to coagulation. Lyckfeldt et al 49) have shown the success of this type of gelcasting using different types of proteins based on albumin for ceramic powders, such as alumina, yttriastabilized ZrO 2 and silicon nitride. The only drawback is that during the preparation of the slip, foam formation must be avoided so that additional compounds have to be added as antifoaming agents.…”

Section: )mentioning

confidence: 99%

Recent trends in shape forming from colloidal processing: A review

Tallón

Franks

2011

J. Ceram. Soc. Japan

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Shaping ceramic materials is a research area which has continuing innovation and excellence. Dry processing routes gave way to colloidal techniques enabling the preparation of more complex shapes for a wide and growing field of applications. Both dense and porous ceramics with improved properties can be produced. The development of colloidal processing led to the creation of the near-net-shaping concept, performed through slip casting, gelcasting and freeze casting. Even though these concepts have been used for the last few decades, different trends and combinations of these techniques are refreshing the processing strategies in recent years. New chemistries and concepts continue to emerge. This paper creates an overview of the recent trends in near-net-shaping routes, having a deeper look into gelcasting and freeze casting, since both processes are used in the preparation of tailored and custom dense and porous ceramics.

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“…In the early developed gelcasting systems, acrylate monomers were mainly used as gelling agents in organic solvents. 11) Owing to the toxicity of these systems, other gelcasting systems with environmental friendly agents such as proteins 12) and polysaccharides 13) have been evaluated. For evaluation of gelcasting systems containing agar products, alumina has been the most common ceramic materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of translucent tetragonal zirconia by gelcasting of thin zirconia nano-slurry

Yoshida

Takeno

Sakurada

2016

J. Ceram. Soc. Japan

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Microstructural evolution during the sintering of nanoceramics was investigated in the compacts prepared by gelcasting of tetragonal zirconia nano-slurry with the solid loading of 7 vol %. The initial compact prepared by the gelcasting in this study had the densely packed structure with a narrow pore-size distribution and high connectivity in the particle network. Special attentions were paid to the evolutions of pore structures in the initial and intermediate stage sintering. It was found that the coarsening of the pores, which is thought to be the important obstacle of the densification in nanoceramics, was not remarkable in the sintering of the densely packed compact. The suppression of the pore coarsening resulted in the lowering the sintering temperature. Almost fully dense sample with 99.5% of theoretical density was successfully obtained at the sintering temperature of 1373 K for 2 h. The sample sintered at 1373 K maintained the nanometric structure with the grain size of 79 nm and exhibited the optical translucency.

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Protein forming — a novel shaping technique for ceramics

Cited by 131 publications

References 1 publication

Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

Recent trends in shape forming from colloidal processing: A review

Fabrication of translucent tetragonal zirconia by gelcasting of thin zirconia nano-slurry

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