Preparation of KNbO3 nanocubes using a solvothermal method at low temperature
Preparation of KNbO3 nanocubes using a solvothermal method at low temperature
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低温溶剂热法制备KNbO3纳米立方体
DOI：
10.2109/jcersj2.121.693
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发表时间：
2013
影响因子：
1.1
通讯作者：
S. Wada
中科院分区：
文献类型：
--
作者：
K. Nakashima;I. Fujii;S. Wada
采用溶剂热法制备铌酸钾（KNbO3）。该合成以氧化铌（Nb2O5）和氢氧化钾（KOH）为起始原料，乙醇为反应介质进行。 X 射线衍射 (XRD) 证实了钙钛矿 KNbO3 颗粒的存在，并表明 KNbO3 的晶格是正交晶系。使用扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和扫描透射电子显微镜 (STEM) 研究 KNbO3 的形貌。使用 TEM/STEM 进行能量色散 X 射线 (EDX) 光谱分析，清楚地表明 KNbO3 颗粒为纳米尺寸，并具有带有尖角的立方体形状。 STEM-EDX 观察表明，钾 (K)、铌 (Nb) 和氧 (O) 三种元素均匀分布在纳米立方体中。在获得的 KNbO3 粉末的 EDX 光谱中仅检测到 K、Nb 和 O。由此，利用溶剂热法在低温下成功制备了KNbO3纳米立方体。 ©2013 日本陶瓷学会。版权所有。
Potassium niobate (KNbO3) was prepared using a solvothermal method. The synthesis was conducted using niobium oxide (Nb2O5) and potassium hydroxide (KOH) as starting materials and ethanol as the reaction medium. X-ray diffraction (XRD) confirmed the presence of perovskite KNbO3 particles and indicated that the lattice of the KNbO3 was orthorhombic. The morphology of the KNbO3 was investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and scanning transmission electron microscopy (STEM). Energy-dispersive X-ray (EDX) spectrometry was conducted with TEM/STEM, which clearly revealed that the KNbO3 particles were nanosized and possessed a cubic shape with sharp-edged corners. The STEM-EDX observations indicated that all three elements of potassium (K), niobium (Nb), and oxygen (O) were distributed homogeneously across the nanocubes. Only K, Nb, and O were detected in the EDX spectrum of the KNbO3 powders obtained. Thus, KNbO3 nanocubes were successfully prepared using a solvothermal method at low temperature. ©2013 The Ceramic Society of Japan. All rights reserved.