Hydrothermal Synthesis and Characterization of NaxK1-xNbO3 Ceramics

Reference Presenter Authors
06-211 Swarup Kundu Kundu, S.(Universidade Estadual Paulista, Araraqara); Teixeira, G.F.(Universidade Estadual Paulista, Araraqara); Zaghete, M.A.(Universidade Estadual Paulista, Araraqara); Longo, E.(Federal University of São Carlos); Sodium potassium niobate powders were synthesized by conventional hydrothermal reaction route using Nb2O5 in the mixture of NaOH and KOH solution. A single phase of NaxK1-xNbO3 composition series was obtained by changing the molar ratio of NaOH/KOH and the reaction temperature was 200 °C/10 h. The high concentration of NaOH/KOH mixture was found to be a critical requirement for the formation of NaxK1-xNbO3. Compared with the traditional solid-state reaction, the hydrothermal process significantly lowered the temperature required for synthesizing NaxK1-xNbO3. The effect of different parameters such as the concentration of reactants, time and temperature on the phase formation, morphology and piezoelectric properties of the above phases has been investigated.
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