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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"porous ceramics"”.
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Fabrication of porous ceramics and composites by a novel freeze casting process
Porous ceramics have been widely used in many fields. Among the fabrication techniques for porous ceramic, freeze casting has recently attracted much attention as being a versatile, low cost and environmental friendly process. In this study, alumina and Al\(_2\)O\(_3\)-ZrO\(_2\) were utilized as …
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Development of analytical model relating compressive strength in porous ceramics to mercury intrusion porosimetry-derived microstructural parameters
… a classical formula representing the strength of porous ceramic materials. Here $\beta$ is an empirical constant. Hence this equation lacks the capability of relating microstructure to actual strengths, especially with regard to $\beta$. Correspondingly, this research focused on the relationship …
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Development of porous delivery systems for oral drug and vaccine administration
As porous materials (polymers, metals and ceramics) have many interesting physical and chemical properties, they have widespread applications in nearly every technology sector. Chapter 1 described the main biomedical application of cellular materials: the use of porous ceramics, polymers and/or …
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Thin optic surface analysis for high resolution X-ray telescopes
… flatness of -500 nm. A novel method utilizing porous ceramics, which provide a thin layer of air for sheet glass to rest on during the shaping process, is investigated. The shaping process involves slumping glass on a uniform layer of air at elevated temperatures, where the viscosity of glass …
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Novel Preparation of Porous Alumina using Ice Particles as Pore-Forming Agents
Porous 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 …
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Development of Stochastic and Anisotropic Multiscale Ceramics Using High Aspect Ratio Sacrificial Fillers
… a straightforward and cost-effective way to form porous ceramics. There is a specific emphasis on creating anisotropic structures via a directional ice-templating technique and hard-templating using the sacrificial filler method. Cellulose nanocrystals (CNCs) aerogels have been created via a …
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Function follows form: novel structured encapsulation materials via microfluidics
… characteristics; a reason behind why bones are porous, ceramics are heat-resistant, and composites are resilient. Materials science students know this better than others as part of our core curriculum, yet there are many avenues and applications for which these principles have yet to be applied. …
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Mechanics and Durability of Fiber Reinforced Porous Ceramic Composites
Porous ceramics and porous ceramic composites are emerging functional materials that have found numerous industrial applications, especially in energy conversion processes. They are characterized by random microstructure and high porosity. Examples are ceramic candle filters used in coal-fired …
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Design and Manufacture of an Ultrasonic Transducer for Long-term High Temperature Operation
… with 3 dB bandwidth of 90-95%. The concept of porous ceramics as a new generation of high temperature backing element is described. An acoustic model for wave propagation in such a medium was employed to estimate the optimal porosity and pore size for the backing element. Various high …
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Nanostructured Polymer-Derived Ceramic Aerogels for Environmental and Energy Applications
… and ceramic matrix composites. Among these, porous and cellular ceramics can be synthesized via PDC routes as well, laying the foundations for new, cheap and functional sorbents and scaffolds. In such a scenario, ceramic aerogels are ultraporous materials possessing high surface areas, low …
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Generation of Titanium Dioxide Parts using Cellulose Nanocrystal Aerogel Hard Templates
… studies the generation of crystalline mesoporous structured titanium dioxide (TiO2) using cellulose nanocrystal (CNC) aerogel hard templates for photocatalytic and biomaterial applications. Suspensions of CNCs in water varying in solid loading from 20 mg/mL to 100 mg/mL were prepared and …