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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1421 (January) (2014)  >  pp.29-34

Journal of the Ceramic Society of Japan
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Preparation and evaluation of ferrite-silica aerogel nanocomposite

Naruhito KATAGIRI1) 2), Nobuyasu ADACHI2), Toshitaka OTA2)
1) Technology Development Center, Rinnai Corporation 2) Advanced Ceramics Research Center, Nagoya Institute of Technology

The ferrite-silica aerogel nanocomposite prepared by a sol–gel process and a supercritical drying process was investigated from the point of view of new composite material. The ferrite nanoparticles were prepared by a coprecipitation method and added to tetramethylorthosilicate (TMOS) in the range of 0 to 20 mol %. The ferrite-silica wet gel was prepared from TMOS containing ferrite nanoparticles, ethanol, deionized water and NH3 aq. as a catalyst, and replaced the liquid phase and aged in the ethanol. Then, a hydrophobing treatment was performed in hexamethyldisilazane toluene solution. Finally, the ferrite-silica wet gel was dried in the supercritical carbon dioxide fluid. The obtained ferrite-silica aerogel nanocomposite was evaluated by bulk density, porosity, specific surface area, pore size distribution, SEM and TEM observation, EDS analysis and magnetization measurement by VSM. As a result, even if it added the ferrite, the characteristics of aerogel was held and the magnetic property of the ferrite remained unchanged in the aerogel.

Magnetic property, Ferrite, Silica aerogel, Nanocomposite, Sol–gel, Supercritical drying

Received: August 28, 2013
Accepted: October 21, 2013 , Published online: January 01, 2014
Copyright © 2014 The Ceramic Society of Japan



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