Materials Transactions Online

Materials Transactions, Vol.49 No.09 (2008) pp.2166-2168
© 2008 The Japan Institute of Metals

Synthesis of Sodium Niobate Powders by Mechanochemical Processing

Jung-Yeul Yun1,2, Jae-Ho Jeon1 and Suk-Joong L. Kang2

1Department of Powder Materials, Korea Institute of Materials Science, Changwon, 641-010, Korea
2Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejon, 305-701, Korea

Sodium niobate (NaNbO3) powder was successfully synthesized by high-energy milling of commercially available Na2CO3 and Nb2O5 powders. The powder mixture was subjected to a mechanochemical treatment of up to 300 min using a ZrO2 vial and ZrO2 or WC balls. The formation of NaNbO3 was monitored by X-ray diffraction. Use of WC balls reduced the time required for synthesis. It was possible to synthesize NaNbO3 within 120 min when using WC balls. The mechanochemically synthesized powder consisted of agglomerates of nano size particles of 10–20 nm, whereas the size of powders prepared by conventional calcination was 100–600 nm.

(Received 2008/6/11; Accepted 2008/6/19; Published 2008/7/30)

Keywords: mechanochemical synthesis, lead-free, sodium niobate, nanomaterials, X-ray techniques

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