Premium
Microwave‐Assisted Synthesis of Fine Particle Oxides Employing Wet Redox Mixtures
Author(s) -
Manoharan Solomon Sundar,
Prasanna Sigamani John,
Rao Manju Lata,
Sahu Ranjan Kumar
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.tb00482.x
Subject(s) - exothermic reaction , microwave , redox , ceramic , metal , dielectric , chemistry , materials science , radiation , particle (ecology) , chemical engineering , inorganic chemistry , organic chemistry , optics , optoelectronics , physics , oceanography , engineering , quantum mechanics , geology
Interaction of electromagnetic radiation with a physical mixture of metal nitrates and amides/hydrazides is observed to initiate high‐temperature reactions, useful for realizing several high‐temperature ceramic materials. A judicious choice of such redox mixtures undergoes exothermic reactions when they couple with microwave radiation. The coupling of electromagnetic radiation with metal salts and amides/hydrazides depends on the dielectric properties of the individual components in the reaction mixture. The approach has been used to prepare γ‐Fe 2 O 3 , Fe 3 O 4 , MgCr 2 O 4 , α‐CaCr 2 O 4 , and La 0.7 Ba 0.3 MnO 3 .