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Published April 16, 2020 | Published
Patent Open

Freeze-cast ceramic membrane for size based filtration


Provided herein are methods for making a freeze-cast material having a internal structure, the methods comprising steps of: determining the internal structure of the material, the internal structure having a plurality of pores, wherein: each of the plurality of pores has directionality; and the step of determining comprises: selecting a temperature gradient and a freezing front velocity to obtain the determined internal structure based on the selected temperature gradient and the selected freezing front velocity; directionally freezing a liquid formulation to form a frozen solid, the step of directionally freezing comprising: controlling the temperature gradient and the freezing front velocity to match the selected temperature gradient and the selected freezing front velocity during directionally freezing; wherein the liquid formulation comprises at least one solvent and at least one dispersed species; and subliming the at least one solvent out of the frozen solid to form the material.

Additional Information

2018-08-24: Priority to US201862722689P. 2019-08-23: Application filed by California Institute of Technology. 2020-04-16: Publication of US20200115291A1

Attached Files

Published - US20200115291A1.pdf

Published - WO2020041759A1.pdf


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August 19, 2023
August 19, 2023