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Synthesis of potassium niobate (KNbO3) nano-powder by a modified solid-state reaction |
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| Authors: | Nopsiri Chaiyo Anucha Ruangphanit Rangson Muanghlua Surasak Niemcharoen Banjong Boonchom Naratip Vittayakorn |
| Affiliation: | 1. Electroceramic Research Laboratory, College of KMITL Nanotechnology, King Mongkut??s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand 2. ThEP Center, CHE, 328 Si Ayutthaya Rd, Bangkok, 10400, Thailand 3. Thai Micro Electronics Center (TMEC), National Electronics and Computer Technology Center, Chachoengsao, Chachoengsao, Thailand 4. Faculty of Engineering, Department of Electronics, King Mongkut??s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand 5. King Mongkut??s Institute of Technology Ladkrabang, Chumphon Campus, 17/1?M. 6 Pha Thiew District, Chumphon, 86160, Thailand 6. Faculty of Science, Department of Chemistry, King Mongkut??s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand |
| Abstract: | Crystalline lead-free piezoelectric potassium niobate (KNbO3) powders have been synthesized through a modified solid-state reaction method. The thermal behavior of the K2C2O4·H2O and Nb2O5 raw material mixture was investigated by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The X-ray diffraction technique (XRD) was used to investigate the phase formation and purity. The morphology of the powder obtained was characterized using a scanning electron microscope (SEM). The XRD pattern showed that the monophasic perovskite phase of KNbO3 could be synthesized successfully at a temperature as low as 550 °C for 240 min, with an average crystallite size of 36 ± 8 nm. The SEM images suggested that the average particle size of the powder obtained was 278 ± 75 nm. |
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