Control of the inner stresses in ceramic green bodies formed by gelcasting

Ma, Liguo; Huang, Yong; Yang, Jinlong; Le, Huirong; Sun, Yan

doi:10.1016/j.ceramint.2004.12.011

Cited by 34 publications

(9 citation statements)

References 9 publications

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“…Table 1 lists the basic properties of the synthesized monomers, such as wetting angle of the alumina substrate and glass transition temperatures of the polymers obtained by radical polymerization of the monomers. The measurements were also performed for 2-hydroxyethyl acrylate, which is a commercially available monomer that is often described in the literature regarding gelcasting process [36]. It was used as a comparative substance.…”

Section: Resultsmentioning

confidence: 99%

Sweet ceramics: how saccharide-based compounds have changed colloidal processing of ceramic materials

Wiecińska

Żurawska

Falkowski

et al. 2020

J. Korean Ceram. Soc.

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Herein, we present manifold possibilities of using saccharides and their derivatives in colloidal processing of ceramics. Sugar-based compounds are attractive alternatives for commonly used organic additives, because they are renewable materials, are non-toxic to human skin, and have a positive influence on the rheological behavior and stability of ceramic suspensions which is reflected in the properties of green and sintered bodies. The examined substances include sugar acids (galacturonic and lactobionic acid) as highly effective deflocculants for nanopowders; acryloyl derivatives of monosaccharides and sugar alcohols as organic monomers in gelcasting; polysaccharides as binders; and l-ascorbic acid as an activator of radical polymerization in gelcasting. The multifunctionality of the selected compounds as well as their thermal decomposition during sintering of ceramics is discussed. The study also reviews the related literature focusing on sugar-based compounds in ceramic processing.

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Section: Resultsmentioning

confidence: 99%

Sweet ceramics: how saccharide-based compounds have changed colloidal processing of ceramic materials

Wiecińska

Żurawska

Falkowski

et al. 2020

J. Korean Ceram. Soc.

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“…Later on researchers began to use substances which do not contain the nitrogen atom in the molecule such as 2-hydroxyethyl acrylate [9]. It should be also mentioned that both acrylamide and 2-hydroxyethyl acrylate have to be used together with so called cross-linking agent (e.g.…”

Section: Introductionmentioning

confidence: 99%

Thermal decomposition of monosaccharides derivatives applied in ceramic gelcasting process investigated by the coupled DTA/TG/MS analysis

Bednarek

Szafran

2012

J Therm Anal Calorim

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The paper reports the decomposition of saccharides derivatives in comparison to commercial substances during the process of binder removal from ceramic samples. The saccharides derivatives are polymers synthesized from glucose and fructose with acryloyl group in the sugar molecule. The synthesized compounds played the role of binder in the shaping of ceramic powders by gelcasting method. The method belongs to colloidal processes and allows to produce ceramic elements of complicated geometry. As ceramic powder Al 2 O 3 was used. The thermal analysis have been done on apparatus coupled with mass spectrometer. MS analysis showed what types of gasses are released to the atmosphere during the thermal decomposition of polymers. The obtained results showed important differences in decomposition of polymers obtained from commercial acrylamide, 2-hydroxyethyl acrylate and N,N 0 -methylenebisacrylamide in comparison to synthesized glucose and fructose derivatives. The measurements allowed to establish the sintering program of the green ceramic samples and evaluate whether harmful NO x gases are released to the atmosphere.

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“…Fracture or crack growth results from the competition of the strength of the gelcast body and the stress developed during gelation and drying. Many factors can affect fracture or crack growth, including the monomer concentration, monomer/cross-linker ratio, initiator concentration, initiator/catalyst ratio, gelation temperature and drying condition (humidity), etc (Ma et al, 2006). It is easy to be understood that too low a monomer concentration is insufficient to keep the three dimensional polymer network structure.…”

Section: Factors Affecting Fracture and Crack Growthmentioning

confidence: 99%