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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.121  No.1416 (August) (2013)  >  pp.730-733

Journal of the Ceramic Society of Japan
<<Previous article Vol.121  No.1416 (August) (2013)   pp.730 - 733 Next article>>

Microstructural control of porous Al2TiO5 by using potato starch as pore-forming agent

Hitoshi NISHIJIMA1), Ryosuke MAKI1), Yoshikazu SUZUKI1) 2)
1) Graduate School of Pure and Applied Sciences, University of Tsukuba 2) Faculty of Pure and Applied Sciences, University of Tsukuba

In this study, we have tried to prepare porous Al2TiO5 ceramics with potato starch as a pore-forming agent at relatively low sintering temperatures by reactive sintering method using fine-grained starting materials. α-Al2O3 powder (0.1 µm) and TiO2 rutile powder (2 µm) were wet-ball milled in ethanol for 2 h in a planetary ball-mill. The mixed powder was blended with 5–30 wt % of potato starch powder in an agate mortar with ethanol. Green samples with no binder were sintered at 1300–1500°C for 2 h in air. The sample contained finer closed pores (<1 µm) as well as the larger pores (5–80 µm). The finer microstructure formation can be explained by (1) the local heating effect via the combustion of potato starch, and (2) water vapor-assisted effect.


Keyword:
A: Sintering, B: Porosity, D: Al2TiO5, E: Thermal application

Received: April 15, 2013
Accepted: June 02, 2013 , Published online: August 01, 2013
Copyright © 2013 The Ceramic Society of Japan

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