Synthesis of La₂NiO₄ via a PVA-based route

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• 作者：Ting  ; Liu^a ; Yebin  ; Xu^b ;   ; ^{xuyebin@yahoo.com} ; Yang  ; Li^c ; Zhaohui  ; Wang^d ; Jingyuan  ; Zhao^b
• 关键词：Sol&ndash ; gel ; Polyvinyl alcohol ; La₂NiO₄
• 刊名：Ceramics International
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：37
• 期：8
• 页码：3361-3364
• 全文大小：887 K

文摘

Single-phase La₂NiO₄ has been prepared using polyvinyl alcohol (PVA) as a complexing agent. Thermogravimetric (TG), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were used to characterize precursor and derived oxide powders. The particle size and morphologies of La₂NiO₄ crystallites were characterized by field emission scanning electron microscope (FSEM). The effect of the mol ratios of metal ion to hydroxyl groups in polyvinyl alcohol on the formation of La₂NiO₄ was investigated. XRD analysis showed that single-phase and well-crystallized La₂NiO₄ was obtained from precursor with M/OH = 1:3 at 900 ¡ãC. The La₂NiO₄ ceramics sintered at 1300 ¡ãC for 4 h exhibits an electrical conductivity of 42.5 ¦¸^? cm^? at room temperature.