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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
<<Previous article Vol.122  No.1421 (January) (2014)   pp.29 - 34 Next article>>

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.


Keyword:
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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