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1609826 
Journal Article 
Synthesis of (K,Na)NbO3 particles by traditional hydrothermal method and high-temperature mixing method under hydrothermal-solvothermal conditions 
Bai, Lin; Zhu, K; Qiu, J; Zhu, R; Gu, H; Ji, H 
2011 
1 
Research on Chemical Intermediates
ISSN: 0922-6168
EISSN: 1568-5675 
37 
2-5 
185-193 
WOS:000291159400009 
Pure (K,Na)NbO3 (KNN) powders have been successfully
prepared by using traditional hydrothermal method and high-temperature mixing method (HTMM) under
solvothermal and hydrothermal conditions. The products were characterized by X-ray diffraction
(XRD) and scanning electron microscopy (SEM) to show the change of phase, morphology, and size of
the as-prepared particles with the alkalinity of the starting solution. Compared with the
traditional hydrothermal method, smaller particles with higher phase purity are prepared using
HTMM under hydrothermal conditions. It is found that the alkalinity has significant effects on
the crystal size. The KNN grain size first increases and then decreases with increasing
alkalinity. Typical samples solvothermally synthesized in a mixed solvent with
isopropanol/deionized water ratio of 50/50 by volume were made of well-crystallized single-
crystalline nanoparticles with size of about 500 nm. 
(K,Na)NbO3; Hydrothermal conditions; Alkalinity; Isopropanol; Grain size