Phase structure, morphology, and Raman characteristics of NaNbO3 particles synthesized by different methods
Phase structure, morphology, and Raman characteristics of NaNbO3 particles synthesized by different methods
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不同方法合成的NaNbO3颗粒的相结构、形貌及拉曼特征
DOI：
10.1016/j.materresbull.2008.07.014
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发表时间：
2009-03-05
影响因子：
5.4
通讯作者：
Wang, Zenglin
中科院分区：
文献类型：
--
作者：
Chang, Yunfei;Yang, Zupei;Wang, Zenglin
分别采用传统的混合氧化物法（CMO）、熔盐法（MSS）和局部化学微晶转化法（TMC）合成了NaNbO3（NN）纳米粒子。研究了制备方法对NaNbO 3颗粒物相结构、形貌和拉曼光谱的影响。结果表明，采用传统的混合氧化物法和熔盐法制备的NN粒子均为正交晶系，空间群为Pbma。此外，这些颗粒具有等轴形态。采用局部化学微晶转化法合成的NaNbO3单晶颗粒具有准立方结构。此外，它们是具有高的纵横比和高的（h00）度的取向，这是非常有前途的（K，Na）NbO3（KNN）基陶瓷织构模板的板状形状。此外，拉曼光谱中的所有谱线都可以归属于NbO 6八面体的内模，证明了不同方法合成的颗粒具有不同的结构类型。(C)2008爱思唯尔有限公司保留所有权利。
NaNbO3 (NN) particles were synthesized by using conventional mixed-oxide (CMO), molten salt synthesis (MSS) and topochemical micro-crystal conversion methods (TMC), respectively. The effects of preparation methods on the phase structure, morphology and Raman characteristics of the NaNbO3 particles were investigated. The results show that the NN particles prepared by conventional mixed-oxide and molten salt synthesis methods are all of orthorhombic structure in Pbma space group. Furthermore, those particles have equiaxial morphology. The single-crystal NaNbO3 particles synthesized by the topochemical micro-crystal conversion method are of pseudocubic structure. Moreover, they are of plate-like shape with a high aspect ratio and a high (h 0 0) degree of orientation, which is very promising as template for texturing (K, Na)NbO3 (KNN) based ceramics. Besides, all the spectra lines in the Raman spectra can be attributed to the internal modes of NbO6 octahedron, and they prove that the particles synthesized by the different methods have different structure types. (C) 2008 Elsevier Ltd. All rights reserved.