Direct Synthesis of (K0.5Na0.5)NbO3Powders by Mechanochemical Method | Zendy

Nguyễn Đức Văn | Zendy

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Direct Synthesis of (K_0.5Na_0.5)NbO₃Powders by Mechanochemical Method

Author(s) -

Nguyễn Đức Văn

Publication year - 2013

Publication title -

advances in materials science and engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.356

H-Index - 42

eISSN - 1687-8442

pISSN - 1687-8434

DOI - 10.1155/2013/230216

Subject(s) - natural bond orbital , materials science , analytical chemistry (journal) , raman spectroscopy , powder diffraction , crystallography , chemistry , molecule , physics , organic chemistry , chromatography , optics

The synthesis and structural properties of lead-free piezoelectric (K0.5Na0.5)NbO3 powders prepared by mechanochemical method using Nb2O5, K2CO3, and Na2CO3 as starting materials were reported. X-ray diffraction, infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy were used to characterize the prepared samples. Results showed that, for the first time, by selecting the milling speed of 600 rpm and the ball-to-powder weight ratio of 35 : 1 as milling parameters, pure (K0.5Na0.5)NbO3 crystalline phase was obtained directly in the as-milled samples after 5 h of milling time. The existence of a carbonato complex between CO32− and Nb5+ ions as an intermediate species of the formation of (K0.5Na0.5)NbO3 was also found

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