Effects of PVA content on the synthesis of LaFeO3 via sol-gel route

被引：89

作者：

Feng, Jiansheng ^{[1
]}

Liu, Ting ^{[1
]}

Xu, Yebin ^{[1
]}

Zhao, Jingyuan ^{[1
]}

He, Yanyan ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Inst Optoelect Sci & Engn, Wuhan 430074, Hubei, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2011年 / 37卷 / 04期

关键词：

Powders: chemical preparation; Sol-gel process; Perovskites; LaFeO3; THERMAL-DECOMPOSITION; COMBUSTION SYNTHESIS; PEROVSKITES; POWDERS; OXIDES;

D O I：

10.1016/j.ceramint.2010.11.045

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

LaFeO3 were synthesized via a sol gel route based on polyvinyl alcohol (PVA). Differential scanning calorimetry (DSC), Thermogravimetric (TG), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FESEM) techniques were used to characterize precursors and derived oxide powders. The effect of the ratios of positively charged valences to hydroxyl groups of PVA (Mn+/-OH) on the formation of LaFeO3 was investigated. XRD analysis showed that single-phase and well-crystallized LaFeO3 was obtained from the Mn+/-OH = 4:1 molar ratio precursor at 700 degrees C. For the precursor with Mn+/-OH = 2:1, nanocrystalline LaFeO3 with average particle size of 50 nm was formed directly in the charring procedure. With increase of PVA content to Mn+/-OH = 1:1, phase pure LaFeO3 was obtained at 500 degrees C. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1203 / 1207

页数：5

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