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Barium Holmium Zirconate, A New Perovskite Oxide: II, Synthesis as Nanoparticles through a Modified Combustion Process
Author(s) -
Jose Rajan,
John Asha Mary,
Divakar Ramachandran,
Koshy Jacob
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.tb00470.x
Subject(s) - materials science , thermogravimetric analysis , zirconate , perovskite (structure) , differential thermal analysis , holmium , nanoparticle , high resolution transmission electron microscopy , particle size , ceramic , transmission electron microscopy , analytical chemistry (journal) , oxide , mineralogy , chemical engineering , diffraction , crystallography , nanotechnology , chemistry , composite material , metallurgy , optics , organic chemistry , laser , physics , engineering , titanate
Nanoparticles of barium holmium zirconate, a new complex perovskite ceramic oxide, has been synthesized using a modified self‐propagating combustion process. The solid combustion products obtained were characterized by X‐ray diffraction (XRD), electron diffraction, differential thermal analysis, thermogravimetric analysis, infrared spectroscopy, particle size analysis, surface area determination, and high‐resolution transmission electron microscopy. The XRD and electron diffraction studies have shown that the as‐prepared powder is phase pure Ba 2 HoZrO 5.5 and has a complex cubic perovskite (A 2 BB′O 6 ) structure with a lattice constant a = 8.428 Å. The transmission electron microscopic investigation has shown that the particle size of the as‐prepared powder was in the range 4–16 nm with a mean grain size of 8.2 nm. The nanoparticles of Ba 2 HoZrO 5.5 obtained by the present method could be sintered to 98% theoretical density at 1500°C.