Fast synthesis of NaNbO3 and K0.5Na0.5NbO3 by microwave hydrothermal method
Source abstract
Abstract
Abstract Synthesis of sodium and potassium–sodium niobates (NaNbO 3 and K 0.5 Na 0.5 NbO 3 ) was achieved by reducing the reaction time via microwave-assisted hydrothermal route. Sodium niobate was synthesized at 180 °C for 15 min using NaOH 6 M. During the synthesis of KNN at 180 °C, the K 4 Na 4 Nb 6 O 19 –9H 2 O intermediate phase appeared. By increasing the temperature to 200 and 220 °C, the pure KNN phase was obtained. Potassium–sodium niobate was prepared at 220 °C for 15 min using KOH/NaOH 8 and 10 M. These results were confirmed by X-ray diffraction, Scanning Electron Microscopy and Raman spectroscopy. The NaNbO 3 and K 0.5 Na 0.5 NbO 3 powders consisted of agglomerated pseudo-cubic crystals.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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