SYNTHESIS AND CHARACTERIZATION OF LEAD-FREE SODIUM NIOBATE POWDER

被引：0

作者：

Vlazan, Paulina ^{[1
]}

Sfirloaga, Paula ^{[1
]}

Rus, Stefania Florina ^{[2
]}

机构：

[1] Natl Inst Res Dev Electrochem & Condensed Matter, Plautius Andronescu Str 1, Timisoara, Romania

[2] Natl Inst Res Dev Electrochem & Condensed Matter, Dr Aurel Paunescu Podeanu Str 144, Timisoara 300569, Romania

来源：

STUDIA UNIVERSITATIS BABES-BOLYAI CHEMIA | 2016年 / 61卷 / 01期

关键词：

sodium niobate; hydrothermal method; X-ray diffraction; scanning electron microscopy; HYDROTHERMAL SYNTHESIS; FREE PIEZOCERAMICS; TITANATE; NANOTUBES;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Sodium niobate (NaNbO3) fine powders were synthesized by hydrothermal method using ammonium niobate (V) oxalate hydrate (C4H4NNbO9 x H2O), sodium hydroxide (NaOH) and sodium citrate hydrate (C6H9Na3O9) as precursors. The samples were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), AFM (Atomic Force Microscopy), UV-VIS spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR). X-ray diffraction for powder obtained by hydrothermal method revealed three phases mixture (NaNbO3, Nb2O5, Na2C2O4). In order to obtain a material with perovskite structure, the powder was treated for 6 h at 600 degrees C. After calcination, the X-ray powder diffraction (XRD) patterns shown reflections of a pure cubic structure (space group Pm-3m) with lattice parameters (a=b=c=3.909 angstrom) comparable to those reported in the literature. The average particle sizes estimated by SEM image were 2-3 micrometers.

引用

页码：33 / 41

页数：9

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