An Efficient Approach for the Direct Synthesis of KNbO₃ Powders

摘要

Pure potassium niobate (KNbO₃) powders were prepared at low temperatures by an efficient method using K₂CO₃ and Nb₂O₅ as raw materials and urea as fuel. The crystal structure and morphology of the powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results reveal that cubic phase KNbO₃ powders can be obtained at 550°C by the low-temperature combustion method and with the temperature increasing to 700°C they change to orthorhombic phase KNbO₃. The synthesis parameters are studied to reveal the optimized synthesis conditions for preparing pure KNbO₃ powders.View full textDownload full textKeywordsCombustion, Direct synthesis, KNbO3 , Lead-free piezoelectric ceramicsRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/15394450902996544