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A Co‐precipitation Technique of Preparing LaNbO 4 Powders
Author(s) -
Gupta U. N.,
Pradhan Sivaram,
Muthurajan H.,
Kumar H. H.,
Kharat D. K.,
Ravi V.
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01796.x
Subject(s) - precipitation , materials science , scanning electron microscope , phase (matter) , particle size , hydroxide , coprecipitation , aqueous solution , sodium hydroxide , analytical chemistry (journal) , chemical engineering , mineralogy , inorganic chemistry , chemistry , chromatography , composite material , engineering , physics , organic chemistry , meteorology
A simple co‐precipitation technique was successfully used for the preparation of pure ultra fine, single‐phase LaNbO 4 (LN). Aqueous sodium hydroxide was used to precipitate La 3+ and Nb 5+ cations as hydroxides simultaneously under basic conditions. For comparison, LN powders were also prepared by the traditional solid‐state method. It is observed that the co‐precipitation technique produces LaNbO 4 on heating at temperatures as low as ∼300°C, whereas complete phase formation occurs only at 900°C or higher in the solid‐state method. The phase contents and lattice parameters were studied using powder X‐ray diffraction (XRD). The XRD results show that phases obtained by both methods were different. The average particle size and morphology of these powders were analyzed by scanning electron microscope.