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dc.contributor.authorSmith, Samantha Gailen_US
dc.date.accessioned2017-04-04T19:49:34Z
dc.date.available2017-04-04T19:49:34Z
dc.date.issued2011-07-15en_US
dc.identifier.otheretd-07252011-101335en_US
dc.identifier.urihttp://hdl.handle.net/10919/76830
dc.description.abstractPorous ceramics have successfully been used in a wide variety of highly advanced applications. Current routes to porous ceramics are limited in the types of porosity they can create and no one process is flexible enough to create any desired structure. This study introduces the use of ice particles as pore forming agents to fabricate porous materials. This novel method possesses several advantages over current industrial techniques including environmental friendliness, low cost, and flexibility in size and shape of resulting pores. Porous ceramic structures were created by adding preformed ice particles to an alumina slurry which was quickly frozen, air dried, and then sintered. Porosity was characterized using Scanning Electron Microscopy (SEM), Archimedes measurements, and gas sorption techniques. Small spherical pores were successfully created in the 20-200?m range and larger spherical pores were also created in the 2-3 mm range. Amount of porosity was controlled through specifying the amount of ice added to the ceramic slurry. Samples were prepared with porosity levels ranging from 30-75%. As a completely new process, these initial results are quite promising and further development will allow for even greater morphology control.
dc.language.isoen_USen_US
dc.publisherVirginia Techen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjecticeen_US
dc.subjectslip-castingen_US
dc.subjectpore-forming agenten_US
dc.subjectporous ceramicsen_US
dc.titleNovel Preparation of Porous Alumina using Ice Particles as Pore-Forming Agentsen_US
dc.typeThesisen_US
dc.contributor.departmentMaterials Science and Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMaterials Science and Engineeringen_US
dc.contributor.committeechairPickrell, Gary R.en_US
dc.contributor.committeememberAning, Alexander O.en_US
dc.contributor.committeememberSuchicital, Carlos T. A.en_US
dc.type.dcmitypeTexten_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07252011-101335/en_US
dc.date.sdate2011-07-25en_US
dc.date.rdate2016-10-18
dc.date.adate2011-08-18en_US


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