@articleIsobe_Maeda_Bornmann_Hemsel_Morita_2014, title=Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method and properties of sintered (K0.48N.52)NBO3 ceramics, volume=61, DOI=10.1109/TUFFC.2014.6722608, number=2, journal=Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on, author=Isobe, G. and Maeda, Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita, Takeshi, year=2014, pages=225–230