TY - JOUR T1 - Novel hydroxide precursors to prepare NaNbO3 and KNbO3 JF - Ceramics International Y1 - 2008 A1 - Muthurajan, H. A1 - Kumar, H. H. A1 - Samuel, V. A1 - Gupta, U. N. A1 - Ravi, V. KW - chemical preparation KW - niobates KW - Perovskites KW - powders KW - X-ray methods AB -

Firstly, fresh niobium, hydroxide was precipitated from NbF5 solution using an aqueous ammonium hydroxide under basic conditions. Then a simple procedure of mixing potassium (or sodium) and niobium hydroxides together and heating at a low temperature (<400 degrees C) produced KNbO3 (KN) or NaNbO3 (NN) powders. This is the lowest temperature so far reported for the formation of these phases. The phase content and lattice parameters are determined by X-ray diffraction (XRD). The average particle size and morphology were studied by scanning electron microscopy (SEM). (c) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

PB - ELSEVIER SCI LTD CY - THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND VL - 34 IS - 3 U3 - Foreign U4 - 1.471 ER -