Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Study of sol-gel processing for fabrication of low density alumina microspheres
Date
2002-07-01
Author
Dilsiz, N
Akovali, G
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
221
views
0
downloads
Cite This
A sol-gel process for producing microspheres of low density alumina has been developed. A Dispal alumina sol and aluminum monohydrate were used as starting materials. Microspheres with spherical shape and controllable size have been produced by using a drop generation technique, The technique consists of producing a continuous stream Of uniform droplets of alumina sol and then converting the drops into a rigid form by exposing them to an ammonium hydroxide gelation medium. By using this technique. alumina spheres with surface area 351 m(2)g(-1) and pore size 10.7 Adegrees have been prepared.
Subject Keywords
Low density alumina
,
Sol-gel processing
,
Microspheres
URI
https://hdl.handle.net/11511/65618
Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
DOI
https://doi.org/10.1016/s0921-5093(01)01726-9
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
Fabrication of high density alumina ceramics from nanopowders through colloidal processing.
Kayacı, Hüseyin Utkucan; Çınar, Simge; Department of Metallurgical and Materials Engineering (2020)
Utilizing nanopowders in production of fully dense materials with fine grain structures is highly advantageous, particularly where high mechanical properties are desired. Besides, recently developed techniques, such as 3D-printing of ceramics, may require high solids content suspensions. Despite the advantages of slurry based processing of oxide ceramics, production of nano-structured high density bodies is still a challenge. The main limitation in colloidal processing of nanopowders is their unexpectedly h...
Investigation of the effects of initial substrate and biomass concentrations and light intensity on photofermentative hydrogen gas production
Akman, Melih Can; Erguder, Tuba Hande; Gündüz, Ufuk; Eroglu, Inci (2014-01-01)
Biohydrogen, which can be produced by dark fermentation and photofermentation processes, is a renewable and clean approach for hydrogen production. In this study, it was aimed to determine the operational conditions which satisfy the highest photofermentative hydrogen production rate in batch reactors. To that purpose, the effects of initial substrate concentration, initial volatile suspended solids (VSS) concentration and light intensity on photofermentation process were investigated by using Response Surf...
The characterisation of die friction as a means to reduce component machining and attain near-net shape form
Özkan, Necati; AYDIN, I. (1998-01-01)
The cylindrical alumina compacts, produced by the uniaxial die pressing technique, posses a certain density distribution due to the creation of uneven stress distributions within the samples, which are controlled, in a major part, by the wall boundary (friction) conditions between the compact and the die wall. Die wall lubrication reduces the wall friction and hence the density variations within the compact. The extent of the shape deviations in the sintered compacts is directly proportional to the extent o...
Investigation of the effects of initial substrate and biomass concentrations and light intensity on photofermentative hydrogen gas production by Response Surface Methodology
Akman, Melih Can; Bayramoğlu, Tuba Hande; Gündüz, Ufuk; EROĞLU, İNCİ (2015-04-27)
Biohydrogen, which can be produced by dark fermentation and photofermentation processes, is a renewable and clean approach for hydrogen production. In this study, it was aimed to determine the operational conditions which satisfy the highest photofermentative hydrogen production rate in batch reactors. To that purpose, the effects of initial substrate concentration, initial volatile suspended solids (VSS) concentration and light intensity on photofermentation process, and their interactive effects were inve...
Characterization of die pressed green compacts
Özkan, Necati (1997-01-01)
Die-pressed agglomerated alumina compacts, prepared as cylinders using single-ended nominally uniaxial compressive stresses, have been characterized by measuring their strength and density distributions. The strength of the alumina compacts, measured using the Brazilian configuration, increases up to an optimum compaction pressure, upon further increasing the compaction pressure, the strength of the green compacts decreases due to the formation of internal cracks. The density distributions in the alumina co...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
N. Dilsiz and G. Akovali, “Study of sol-gel processing for fabrication of low density alumina microspheres,”
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
, pp. 91–96, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65618.