Xu, HaiBo Joung, Mi-Ri Kim, Jin-Seong Nahm, Sahn Kang, Min-Gyu Kang, Chong-Yun Yoon, Seok-Jin 2024-01-20T13:32:41Z 2024-01-20T13:32:41Z 2021-09-05 2012-11-15 1385-8947 https://pubs.kist.re.kr/handle/201004/128648 To synthesize (Na1-xKx)NbO3 nanorods, the Nb2O5-added (1 - y)NaOH-yKOH specimens with 0.0 <= y <= 0.9 were heated at 160 degrees C and subsequently annealed at 500 degrees C. Homogeneous Na-rich (Na1-xKx)NbO3 nanorods were only synthesized for the specimen with y = 0.15. However, NaNbO3 nanorods were formed for specimens with y < 0.15, and K-rich (Na1-xKx)NbO3 nanoplates were obtained for specimens with y > 0.2. The (Na8xK8-8x)Nb6O19 center dot nH(2)O transient phase was formed in the specimen with y = 0.15 heated at 160 degrees C for 8.0-12.0 h, and this phase transformed into the Na-rich (Na1-xKx)NbO3 nanorods after annealing at 500 degrees C. Therefore, the formation of a homogeneous (Na8xK8-8x)Nb6O19 center dot nH(2)O phase at a low temperature is very important for the synthesis of the (Na1-xKx)NbO3 nanorods. The (Na8xK8-8x)Nb6O19 center dot nH(2)O phase was considerably influenced by the heating temperature, and the processing time. The Na-rich (Na1-xKx)NbO3 nanorods have rectangular shape with various sizes, and the growth direction of these nanorods is [001]. (C) 2012 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA PIEZOELECTRIC NANOGENERATORS KNBO3 NANOWIRE GROWTH NANOSTRUCTURES PEROVSKITE Synthesis of homogeneous (Na1-xKx)NbO3 nanorods using hydrothermal and post-heat treatment processes Article 10.1016/j.cej.2012.09.052 1 CHEMICAL ENGINEERING JOURNAL, v.211, pp.16 - 21 CHEMICAL ENGINEERING JOURNAL 211 16 21 scie scopus 000313762000003 Engineering, Environmental Engineering, Chemical Engineering Article PIEZOELECTRIC NANOGENERATORS KNBO3 NANOWIRE GROWTH NANOSTRUCTURES PEROVSKITE Piezoelectric nanogenerator (Na8xK8-8x)Nb6O19 center dot nH(2)O phase Lead-free piezoelectric materials Hydrothermal processes