Applications of ice‐templated ceramics

Abstract

The freeze‐cast ceramics process involves the use of an aqueous slurry in which ice acts as a fugitive template, providing control of the morphology of the resultant green body, which is then sintered. Here, we report a variety of applications of ice‐templated ceramics, showcasing the versatility of the process. Applications include: as a suitable scaffold for silver loading and release at concentrations that could show antibacterial properties; as a component of a robust composite material with negative thermal expansion but reduced material cost; as thin porous structures for dye‐sensitized solar cells.

Effect of hydroxyapatite‐titanium‐MWCNTs composite coating fabricated by electrophoretic deposition on corrosion and cellular behavior of NiTi alloy

“…[54] The presence of the TiO 2 , CaTiO 3 , and Ca 3 (PO 4 ) 2 phases and MWCNTs particles in the HA coating increased the amount of ions absorbed from the culture medium, which is due to the difference in the value of the PZC of these phases compared with the HA. [55][56][57] Increasing the amount of the ions of the culture medium on the surface of the HA-Ti and HA-Ti-MWCNTs coatings compared with the HA coating can increase the cell density on the surface of the HA-Ti and HA-Ti-MWCNTs coatings compared with that of the HA coating. The presence of the HA-based coating on the surface of the NiTi alloy increased the proliferation of the fibroblasts in the cell culture medium due to the reduction of nickel ion released from NiTi alloy, and the high bioactivity of the HA-based coating.…”

Recent advances in phase change materials for thermal energy storage

“…Some of the attributes of the freeze-cast process to form PCM matrices include: the control of porosity (by rate of cooling, and temperature gradient; choice and concentration of binders or structuring agents as additives in the slurry, with morphologies including lamellae or vertical channels, and pore volume from moderate to high); 86,87 the flexibility of types of scaffold materials; the fact that the process is additive which minimizes material requirements; the use of water as the suspension fluid which is far preferable to organic templates that are later burned out. Applications of freeze-cast materials, aside from matrices for form-stable PCMs, include silver-loaded scaffolds with antibacterial properties, low-cost composites with negative thermal expansion, and structures for dye-sensitized solar cells, 88 among many others. 84…”

A New Era of Integrative Ice Frozen Assembly into Multiscale Architecturing of Energy Materials

“…In addition to the particles and solvents, various organic and inorganic additives, such as, glycerol, [ 161 ] gelatin, [ 162,163 ] PVA, [ 163 ] polyethyleneglycol, [ 164 ] sodium chloride, [ 101 ] sucrose, [ 165 ] silica clay, [ 166 ] dioxane, [ 167 ] zirconium acetate, H 4 SiW 12 O 40 (SiW 12 ) [ 168 ] trehalose, [ 101 ] ethanol, [ 169 ] poly(acrylic acid) (PAA), [ 170 ] polyethylene glycol, poly vinyl pyrrolidone, poly(methyl methacrylate), [ 125 ] dextran, [ 171 ] isopropanol, [ 172 ] and polystyrene, [ 173 ] can be incorporated to change the porous structure and morphology of scaffolds. The underlining mechanism becomes more complicated than in pure water without additives.…”