Developing porous ceramics on the base of zirconia oxide with thin and permeable pores by crystallization of organic additive method

Abstract

Abstract. In this paper porous ceramics on the base of ZrO2 nanopowders and micropowders has been developed by freeze-casting method. A zirconia/carbamide slurry was frozen in mold and dehydrated in CaCl2 at room temperature. This simple process enabled the formation of porous ceramics with highly aligned pores as a replica of the carbamide crystals. The samples showed higher porosity of 47.9%. In addition, these materials could be used as membrane for air cleaning.

Freeze casting – A review of processing, microstructure and properties via the open data repository, FreezeCasting.net

“…The microstructures of freeze-cast materials are qualitatively described in terms of their pore structure, with the most commonly reported anisotropic pore structures being lamellar (60%), dendritic (20%), and honeycomb (19%). Anisotropic columnar [217][218][219][220], needle-like [221,222], and fishbone [223] morphologies have also been demonstrated. For isotropic structures, cellular (92%) and equiaxed (7%) structures predominate.…”

Effects of added aluminum chromium slag on the structure and mechanical properties of colored zirconia ceramics

“…Zirconia (ZrO 2 ) ceramics possess several beneficial physical and chemical properties, such as a high melting point of 2700°C, corrosion resistance, thermal conductivity, biocompatibility, and outstanding mechanical properties (eg high strength, hardness, and wear resistance) 1‐5 . Therefore, such materials are widely used in scientific, engineering and biological applications 6 .…”

Modeling the Physical Properties of Gamma Alumina Catalyst Carrier Based on an Artificial Neural Network

“…Porous ceramics also have good absorbability. The conversion and reaction rate increase significantly for the reactive fluid that flows through the porous ceramic channels [4]. Due to the thermal shock and chemical corrosion resistance of porous ceramics, they can be used in high-demand service conditions, such as automotive exhaust treatment and reactors in chemical engineering.…”