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首页> 外文期刊>Journal of Crystal Growth >Sol-gel Synthesis And Characterization Of Lead-free Lnkn Nanocrystalline Powder
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Sol-gel Synthesis And Characterization Of Lead-free Lnkn Nanocrystalline Powder

机译：无铅Lnkn纳米晶粉的溶胶-凝胶法合成及表征

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摘要

A kind of lead-free nanocrystalline powder, (Li_(0.06)Na_(0.47)K_(0.47)NbO_3 (LNKN), has been prepared by a newly developed sol-gel method using Nb_2O_5 as the Nb source. Phase analysis, microstructure and morphology of the powder were determined by X-ray diffraction (XRD), Fourier transform infrared (FTIR), Raman, transmission electron microscope (TEM) and high-resolution transmission electron microscopy (HRTEM). The experimental results showed that pure perovskite phase was formed at the temperature as low as 500 ℃. Besides, the obtained powder belonged to tetragonal symmetry, and the mean particle size was as small as 20 nm. It is believed that the high-quality gel precursor and low processing temperature play a key role in the formation of the LNKN nano-particles. The process developed in this work was convenient to realize the mass production of LNKN nano-powders at low cost.
机译：以Nb_2O_5为Nb源，采用新开发的溶胶-凝胶法制备了一种无铅纳米晶粉末，Li_（0.06）Na_（0.47）K_（0.47）NbO_3（LNKN）。通过X射线衍射（XRD），傅里叶变换红外光谱（FTIR），拉曼光谱，透射电子显微镜（TEM）和高分辨率透射电子显微镜（HRTEM）测定了粉末的形貌，实验结果表明纯钙钛矿相为在低至500℃的温度下形成粉末，所得粉末属于四方对称，平均粒径小至20 nm，据信高质量的凝胶前体和较低的加工温度起着关键作用。这项工作开发的方法方便了以低成本实现LNKN纳米粉的批量生产。

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