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Nanoscale Coating of Silicon and Manganese on Ferrimagnetic Yttrium Iron Garnets
Author(s) -
Cho Yong S.,
Amarakoon Vasantha R. W.
Publication year - 1996
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.1151-2916.1996.tb09044.x
Subject(s) - tetraethyl orthosilicate , materials science , microstructure , yttrium , coating , sol gel , manganese , sintering , ferrimagnetism , grain size , metallurgy , chemical engineering , particle size , nanoscopic scale , mineralogy , composite material , magnetization , nanotechnology , oxide , chemistry , physics , quantum mechanics , magnetic field , engineering
A uniform microstructure of Gd‐substituted yttrium iron garnet (Y 2 Gd 1 Fe 5 O 12 ) was obtained with additives of Si and Mn using a sol‐gel coating process. Tetraethyl orthosilicate (TEOS) and manganese acetate were used as Si and Mn sources for the sol‐gel coating procedure, respectively. TEM/EDS analysis confirmed the presence of a relatively uniform nanoscale coating of Si and Mn around each particle. High density and uniform microstructure were obtained after sintering at 1400°C in O 2 atmosphere. The density and grain size of the specimens depended on Mn content. The results were compared with materials fabricated without additives incorporated by the sol‐gel coating procedure.