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Structure Development of NiO–YSZ Oxide Mixtures in Simulated Citrate–Nitrate Combustion Synthesis
Author(s) -
Marinšek Marjan,
Gomilšek Jana Padežnik,
Arčon Iztok,
Čeh Miran,
Kodre Alojz,
Maček Jadran
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.1551-2916.2007.01924.x
Subject(s) - yttria stabilized zirconia , crystallization , materials science , non blocking i/o , thermogravimetry , combustion , chemical engineering , differential scanning calorimetry , cubic zirconia , oxide , scanning electron microscope , transmission electron microscopy , mineralogy , inorganic chemistry , metallurgy , chemistry , nanotechnology , ceramic , composite material , organic chemistry , catalysis , physics , engineering , thermodynamics
Yttria‐stabilized zirconia (NiO/YSZ) composites were prepared by the modified citrate–nitrate combustion synthesis. The citrate–nitrate combustion proceeded through several consecutive steps. Evolution of structure in the system and its changes were followed up by thermogravimetry‐differential scanning calorimetry, X‐ray powder diffraction, extended X‐ray absorption fine structure, and high resolution transmission electron microscopy analyses of intermediate products prepared at distinct temperatures that correspond to different stages of the combustion process. It was shown that the crystalline structure developed gradually, first with crystallization of nano‐sized NiO particles (400°–700°C), which was followed by crystallization of YSZ (800°–900°C). The final composite material after heat treatment at 1100°C comprised of nano‐crystals with an average size of 6.5±2 nm.