Category: Scientific papers

Thermal properties of alumina–MWCNTs composites Ondrej Hanzel Jaroslav Sedláček Eva Hadzimová Pavol Šajgalík Alumina–multi-wall carbon nanotubes composites were prepared using a new approach. This process comprises functionalization MWCNTs by acid treatment, stabilization of alumina–MWCNT dispersion with subsequent freezing was used, which resulted in formation of granulated powder with homogeneous distribution of MWCNTs. The ceramic composites… Continue reading Thermal properties of alumina–MWCNTs composites

Effect of whey protein isolate and β-cyclodextrin wall systems on stability of microencapsulated vanillin by spray–freeze drying method Swetank Y. Hundre, P. Karthik, C. Anandharamakrishnan Vanillin flavour is highly volatile in nature and due to that application in food incorporation is limited; hence microencapsulation of vanillin is an ideal technique to increase its stability and… Continue reading Freeze Granulation of vanillin flavour

Spray freeze drying for dry powder inhalation of nanoparticles Mohamed Ehab Ali Alf Lamprecht Formulating nanoparticles for delivery to the deep lung is complex and many techniques fail in terms of nanoparticle stability. Spray freeze drying (SFD) is suggested here for the production of inhalable nanocomposite microcarriers (NCM). Different nanostructures were prepared and characterized including… Continue reading Spray freeze drying for dry powder inhalation of nanoparticles

Spray Freeze Granulation of Nano Powders for Die Pressing Jon Binner, Ketharam Annapoorani, Bala Vaidhyanathan The processing of nanocrystalline yttria doped zirconia powder via dry forming routes has been investigated via the granulation of the powder using spray freeze drying (SFD). Free-flowing and crushable powders suitable for either die or isosatic pressing have been achieved… Continue reading Spray Freeze Granulation of Nano Powders for Die Pressing

Yield stress modelling of doped alumina suspensions for applications in freeze granulation: towards dry pressed transparent ceramics M Stuer; P Bowen Rheology of powder suspensions is a key factor in many processing routes, and better understanding of the parameters that control the rheology improves technical progress by reducing the empirical factors in the formulation of… Continue reading Freeze Granulation: towards dry pressed transparent ceramics

Mechanical and functional properties of Al2O3–ZrO2–MWCNTs nanocomposites Martin Michálek Monika Kašiarová Monika Michálková Dušan Galusek Multi-walled carbon nanotubes (MWCNTs) are often reported as additives improving mechanical and functional properties of ceramic composites. However, despite tremendous efforts in the field in the past 20 years, the results are still inconclusive. This paper studies room temperature properties… Continue reading Freeze Granulation of Al2O3-ZrO2-MWCNTs nanocomposites

Spray freeze drying of YSZ nanopowder

Fostering the properties of Zr0.8Sn0.2TiO4 (ZST) ceramics via freeze granulation without sintering additives S. M. Olhero,   Ajay Kaushal and   J. M. F. Ferreira The present paper reports the overall benefits of freeze granulation for enhancing the properties of zirconium tin titanate Zr0.8Sn0.2TiO4 (ZST) ceramics in the total absence of sintering additives. The ZST powder was synthesized… Continue reading ZST ceramics via freeze granulation

A comparison between spray drying and spray freeze drying for dry powder inhaler formulation of drug-loaded lipid–polymer hybrid nanoparticles