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Synthesis of MgAl 2 O 4 Spinel Powder by Combination of Sol–Gel and Precipitation Processes
Author(s) -
Ye Guotian,
Oprea George,
Troczynski Tom
Publication year - 2005
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.1551-2916.2005.00564.x
Subject(s) - calcination , spinel , particle size , materials science , precipitation , specific surface area , thermal decomposition , mineralogy , chemical engineering , economies of agglomeration , crystal (programming language) , sol gel , phase (matter) , metallurgy , chemistry , nanotechnology , catalysis , organic chemistry , physics , meteorology , computer science , engineering , programming language
MgAl 2 O 4 spinel precursor was prepared by a novel method combining a sol–gel process with the “traditional” precipitation process. The thermal decomposition and phase development of the precursor were analyzed, and the degree of agglomeration of the calcined powder was assessed by determining its particle size and crystal size. The optimum calcination temperature was determined based on the variation of specific surface areas, crystal size, and particle size. Completely crystallized ultrafine spinel powder ( d 50 =600 nm, specific surface area=105 m 2 /g) was obtained after calcination at 900°C.