Novel hydroxide precursors for low temperature synthesis of selected ternary oxides

TitleNovel hydroxide precursors for low temperature synthesis of selected ternary oxides
Publication TypeJournal Article
Year of Publication2008
AuthorsMuthurajan, H, N. Rao, K, Gupta, UN, Pradhan, S, Jha, RKumar, Kumar, HH, Mirji, SA, Ravi, V
JournalMaterials Research Bulletin
Volume43
Issue7
Pagination1842-1849
Date PublishedJUL
ISSN0025-5408
KeywordsCeramics, Chemical synthesis, Electron microscopy, Oxides, X-ray diffraction
Abstract

A novel method of using hydroxide precursors to reduce the synthesis temperature for few selected ternary oxides has been presented here. This technique is very useful and advantageous when the ternary oxides contain an alkaline earth element. The selected compositions for this method are BaCeO3 (BC), BaBiO3 (BB), La0.7Sr0.3CoO3 (LSCO) and BaBi2Nb2O9 (BBN). Commercially purchased strontium (or barium) hydroxide and freshly prepared lanthanum, cobalt, bismuth and niobium hydroxides were mixed thoroughly in stoichiometric ratio and heated at different temperatures ranging from 100 to 700 degrees C for 10 h for corresponding compositions. The sequence of the reaction and evolution of the product phase were studied by the X-ray diffraction (XRD) studies. The phase purity and lattice parameters were also determined by XRD investigations. All the product phases in each case were formed at relatively low temperature than when they were prepared by co-precipitation or solid state method. The morphology and average particle size of these powders were investigated by scanning electron microscopy (SEM). (C) 2007 Elsevier Ltd. All rights reserved.

DOI10.1016/j.materresbull.2007.07.006
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)2.145
Divison category: 
Catalysis and Inorganic Chemistry
Physical and Materials Chemistry