Untitled

Koch, Dietmar; Andresen, Lars; Schmedders, T.; Grathwohl, Georg

doi:10.1023/a:1020718225164

Cited by 91 publications

(30 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of studies [17,23,25,30,32,47,55] have revealed the relationships between the solidification kinetics (i.e., the solidification front speed) and the size of the porosity (or the structure) of the freeze-casted ceramics. Such relationships are commonly found in processing techniques based on directional solidification, including metallic and polymeric [62] materials.…”

Section: Walls Thickness Pore Size and Solidification Kineticsmentioning

confidence: 99%

Freeze‐Casting of Porous Ceramics: A Review of Current Achievements and Issues

2008

View full text Add to dashboard Cite

Freeze‐casting, the templating of porous structures by the solidification of a solvent, have seen a great deal of efforts during the last few years. Of particular interest are the unique structure and properties exhibited by porous freeze‐casted ceramics, which opened new opportunities in the field of cellular ceramics. The objective of this review is to provide a first understanding of the process as of today, with particular attention being paid on the underlying principles of the structure formation mechanisms and the influence of processing parameters on the structure. This analysis highlights the current limits of both the understanding and the control of the process. A few perspectives are given, with regards of the current achievements, interests and identified issues.

show abstract

Section: Walls Thickness Pore Size and Solidification Kineticsmentioning

confidence: 99%

Freeze‐Casting of Porous Ceramics: A Review of Current Achievements and Issues

2008

View full text Add to dashboard Cite

show abstract

“…One such system is the aqueous silica sols forming dense cryogels. When SiO 2 .nH 2 O is introduced into the composition of raw ceramic slurry, the amount of polymeric additives can be reduced significantly or even neglected [50,89,[136][137][138][139]. Modification of the porous structure of SiO 2 cryogels allows the formation of porous materials with a density as low as 0.05 g cm À3 and with excellent thermal insulation properties at cryogenic temperatures [15].…”

Section: Cryogel-derived Bulk Materialsmentioning

confidence: 99%

Inorganic Cryogels

Shlyakhtin¹

2014

Polymeric Cryogels

View full text Add to dashboard Cite

“…1)6) Usually, a porous structure can be achieved either by conventional powder processing route with the incorporation of some pore forming agents 5) 7) or by injection molding 8) or by gelcasting. 9) However, whether these processes could be applied in industrial productions depend on the complexity of processing technology, the properties of product, the availability of raw materials, and the extent of environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Pore characteristics and phase compositions of porous corundum-mullite ceramics prepared from kaolinite gangue and Al(OH)<sub>3</sub> with different amount of CaCO<sub>3</sub> addition

Yan

Chen

Lin

et al. 2015

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Porous corundum-mullite ceramics were prepared from Al(OH) 3 and kaolinite gangue with different CaCO 3 amount through an in-situ decomposition pore-forming technique. The effect of the amount of CaCO 3 added (ACA) on the phase compositions and pore characteristics was investigated through X-ray diffractometer (XRD), scanning electron microscopy (SEM), and mercury porosimetry measurements, etc. It's interesting that the granular mullite crystals are in the Al(OH) 3 pseudomorphs but the needle-like mullite crystals are in the gangue pseudomorphs, and found that the ACA slightly affects the apparent porosity (AP), but strongly affects the formation of liquid phase, and then affects the secondary mullitization, microstructure, pore size distribution and crystal morphology. With an increase in ACA from 0 to 2.36 wt %, the increasing liquid phase make the rate of secondary mullitization increase markedly; when the ACA is 2.36 wt %, the secondary mullitization reaches the maximum; with a further increase of ACA to 3.54 wt %, the secondary mullitization decreases due to the formation of anorthite. With an increase in ACA from 0 to 3.54 wt %, the APs are in the range of 40.742.3%, whereas, the average pore size increases from 0.326 to 2.750¯m, and the crystal sizes of mullite in both pseudomorphs increase evidently.

show abstract

Untitled

Cited by 91 publications

References 4 publications

Freeze‐Casting of Porous Ceramics: A Review of Current Achievements and Issues

Freeze‐Casting of Porous Ceramics: A Review of Current Achievements and Issues

Inorganic Cryogels

Pore characteristics and phase compositions of porous corundum-mullite ceramics prepared from kaolinite gangue and Al(OH)<sub>3</sub> with different amount of CaCO<sub>3</sub> addition

Contact Info

Product

Resources

About