Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4398
Title: Preparation and microstuructural development of nanocrystalline titania and alumina
Authors: Çağlar Duvarcı, Özlem
Çiftçioğlu, Muhsin
Güden, Mustafa
Arıkut, G.
Keywords: Titania
Alumina
Nanocrystalline
Sol-Gel
Grain size
Issue Date: 2004
Publisher: Trans Tech Publications
Source: Çağlar Duvarcı, Ö., Çiftçioğlu, M., Güden, M., and Arıkut, G. (2004). Preparation and microstuructural development of nanocrystalline titania and alumina. Key Engineering Materials, 264-268, 2355-2358. doi: 10.4028/www.scientific.net/KEM.264-268.2355
Abstract: The preparation of nanocrystalline titania and alumina was investigated by sol-gel methods using titanium isopropoxide, boehmite and aluminum isopropoxide. Various drying control chemical additives like oxalic acid, acetic acid and polyacrylic acid were used for modifying the drying behaviour and shrinkage of the gels. The sintered densities of the ceramics prepared by sol-gel processing and the dried gels were in the 79-99% of theoretical density for rutile. The green and sintered densities of the pellets prepared by uniaxial pressing of powders derived from sols, gels and precipitation techniques for titania were in the 40-52% and 55-83% respectively. The titania ceramics were observed to experience anatase-rutile phase transformation upon heat treatment at 650oC. The grain size of the sintered ceramics at 650oC was determined to be about 26 nm. Grain size of titania increased to 213 nm. at 850oC. The mechanical properties of these nanocrystalline ceramics were investigated by using microhardness testing.
Description: Proceedings of the 8th Conference and Exhibition of the European Ceramic Society; Istanbul; Turkey; 29 June 2003 through 3 July 2003
URI: http://doi.org/10.4028/www.scientific.net/KEM.264-268.2355
http://hdl.handle.net/11147/4398
ISSN: 1013-9826
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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