Crystalline Intermediate Phases in the Sol-Gel-Based Synthesis of La2NiO4+δ

被引：22

作者：

Efimov, Konstantin ^{[1
]}

Arnold, Mirko ^{[1
]}

Martynczuk, Julia ^{[1
]}

Feldhoff, Armin ^{[1
]}

机构：

[1] Leibniz Univ Hannover, J Heyrovsky Inst Phys Chem & Electrochem, D-30167 Hannover, Germany

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2009年 / 92卷 / 04期

关键词：

COMPLEXING METHOD; IONIC TRANSPORT; OXYGEN; PEROVSKITE; MEMBRANES; PERFORMANCE; CERAMICS; POWDERS;

D O I：

10.1111/j.1551-2916.2009.02943.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

X-ray diffraction and transmission electron microscopy were applied to investigate a sol-gel synthetic process for the mixed oxygen ion and electron conductor La2NiO4+delta with a K2NiF4 structure type. The development of the La2NiO4+delta is elucidated considering the influence of calcination temperatures and dwell times. Following the thermal decomposition of nitrate and organic precursors in an intermediate step, the lanthanum nickel oxide is obtained after a short dwell time above 750 degrees C. This occurs by the transformation of an ultrafinely dispersed powder consisting of lanthanum oxycarbonate, lanthanum oxide, and nickel oxide. The pure La2NiO4+delta phase was obtained by similar solid-state reactions between nanocrystalline powder particles at just 950 degrees C.

引用

页码：876 / 880

页数：5

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