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The Role of Silica Layer on Sintering Kinetics of Silicon Powder Compact
Author(s) -
Lebrun JeanMarie,
Pascal Céline,
Missiaen JeanMichel
Publication year - 2012
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.1551-2916.2011.05052.x
Subject(s) - sintering , materials science , oxidizing agent , thermogravimetric analysis , layer (electronics) , particle (ecology) , silicon , particle size , chemical engineering , kinetic energy , kinetics , partial pressure , morphology (biology) , surface layer , composite material , mineralogy , oxygen , metallurgy , chemistry , engineering , oceanography , physics , organic chemistry , quantum mechanics , biology , genetics , geology
Sintering of fine silicon powder was studied using thermogravimetric experiments associated with dilatometry. The reduction of the silica layer at the particle surface is consistent with a kinetic model taking into account the powder oxygen content, the partial pressure of oxidizing species, and the pore morphology of the sintered material. The presence of silica at the particle surface inhibits coarsening and promotes densification of the powder compact, which is confirmed by kinetic calculations.