Premium
Lead Hafnate (PbHfO 3 ) Perovskite Powders Synthesized by the Oxidant Peroxo Method
Author(s) -
Camargo Emerson R.,
Kakihana Masato
Publication year - 2002
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.1151-2916.2002.tb00412.x
Subject(s) - calcination , inorganic chemistry , orthorhombic crystal system , chemistry , halide , hydrogen peroxide , stoichiometry , aqueous solution , tetragonal crystal system , ammonia , perovskite (structure) , crystallization , phase (matter) , nuclear chemistry , crystal structure , catalysis , crystallography , organic chemistry , biochemistry
Perovskite lead hafnate (PbHfO 3 , PH) nanoparticles that were free from halides and organics were synthesized via the oxidant peroxo method. Stoichiometric amounts of hafnium nitrate (HfO(NO 3 ) 2 ) and lead nitrate (PbHfO 3 ) were dissolved in a diluted hydrogen peroxide (H 2 O 2 ) aqueous solution, which was slowly added to a solution of H 2 O 2 and ammonia (NH 3 ) (pH 11). The lead–hafnium precipitate obtained was filtered and washed, to eliminate all nitrate ions. The precipitate was dried, ground, and calcined at temperatures of 400°–900°C. A tetragonal intermediate phase was identified using X‐ray diffractometry and Raman spectroscopy during the calcination process, followed by the crystallization of the orthorhombic PH phase at ∼700°C.