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Preparation of Silicon Nitride from Silica
Author(s) -
ZHANG SHICHANG,
CAN W. ROGER
Publication year - 1984
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.1151-2916.1984.tb19684.x
Subject(s) - nucleation , materials science , carbon fibers , chemical engineering , silicon nitride , yield (engineering) , silicon , particle size distribution , nitride , particle size , particle (ecology) , mineralogy , nanotechnology , layer (electronics) , chemistry , composite material , metallurgy , organic chemistry , composite number , oceanography , geology , engineering
The nucleation and growth of Si 3 N 4 from a carbon‐Si0 2 mixture in an N 2 atmosphere at 1400°C was studied by varying the specific surface area, particle size, and distribution of the Si0 2 and carbon. Si 3 N 4 yield increased and particle size decreased with increasing Si0 2 and carbon specific surface area. Manner of distribution appeared to have little effect but was difficult to assess. A model was proposed in which heterogeneous nucleation occurs on either the Si0 2 or C surfaces only in the early stages of the reaction. Growth occurs by the reaction