Tape casting of zirconia for ion conducting membranes: A study of dispersants

a b s t r a c tA systematic screening of plasticisers for a polyvinyl butyral based binder system revealed that dibutyl maleate, dibutyl adipate and Pycal 94 are promising and less toxic alternatives to the very harmful but frequently used dibutyl phthalate. Pycal 94 seems especially promising as it unlike the two other candidates did not require a co-plasticiser, such as a polyethylene glycol, thus simplifying the system and reducing the risk of unwanted cross-interactions.An effective and systematic procedure for substitution of the plasticiser, while maintaining chemical compatibility and mechanical properties, was also demonstrated. Incompatible systems were discarded in an initial broad screening while primary systems were further evaluated based on debinding properties, mechanical properties, flow behavior as well as sintering properties of ceramic tapes. The thermomechanical characterization performed on dried drops of binder and their corresponding tapes show strong similarities in the strain/stress profiles, validating the qualitative method used.

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“…For the binder and dispersant a PVB and polyvinyl pyrrolidone (PVP) polymer were used respectively [17]. Fig.…”

Section: Methodsmentioning

confidence: 99%

Novel ceramic processing method for substitution of toxic plasticizers

Foghmoes

Teocoli

Brodersen

et al. 2016

Journal of the European Ceramic Society

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“…This dispersive solvent and dispersant were chosen according to Chartier's work on the formulation of slurries for tape-casting process. [25][26][27] In order to obtain a homogeneous suspension, 2.5% in weight of dispersant compared to YSZ powder was first dispersed in the azeotropic mixture and then powder (>20% in weight) was added under constant magnetic stirring. Attempts to synthesize suspensions using YSZ/MEK-EtOH solution had shown that no film was formed on the YSZ substrates using the dip-coating technique.…”

Section: Formulation Of the Suspensions And Processing For Ysz Filmsmentioning

confidence: 99%

Thick YSZ films prepared via a modified sol–gel route: Thickness control (8–80μm)

Gaudon

Laberty-Robert

Ansart

et al. 2006

Journal of the European Ceramic Society

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“…LSM and CGO are widely used as cathode and inter-diffusion barrier layer in SOFC, as a solid constitute of the porous layer in gas purification applications and gas separation membranes, LSM perovskite is characterized by high magnetotransport properties and is applied in memory and sensor applications. 9,10 Due to the coarse structure and white colour of the CGO powder, as opposed to the fine rounded shape and black colour of LSM, the interface line between co-cast LSM and mixture of LSM and CGO (LSM/LSM CGO) materials was easily distinguished both visually by colour and due to morphological and compositional differences. Concerning the choice of dispersive media, it was decided to use a well-developed organic-based recipe 2,10 with an azeotropic mixture of methylethylketone and ethanol (MEKET) as the solvent.…”

Section: Introductionmentioning

confidence: 99%