Premium
Preparation of Fiberlike Silicon Nitride from Diatomaceous Earth
Author(s) -
Mizuhara Yukako,
Noguchi Masao,
Ishihara Tatsumi,
Satoh Atsushi,
Hiramatsu Katsuto,
Takita Yusaku
Publication year - 1991
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.1151-2916.1991.tb06936.x
Subject(s) - carbothermic reaction , earth (classical element) , silicon nitride , raw material , materials science , fiber , nitrogen , metal , nitride , mineralogy , ammonia , silicon , metallurgy , chemical engineering , chemistry , composite material , layer (electronics) , carbide , physics , organic chemistry , engineering , mathematical physics
Fiberlike Si 3 N 4 was prepared by the carbothermal reduction of diatomaceous earth in a flow of nitrogen and ammonia. Diatomaceous earth, which is an inexpensive raw material, is composed of 82.5 wt% SiO 2 , 5.69 wt% Al 2 O 3 , and a very small amount of metal oxides (K 2 O, CaO, and Fe 2 O 3 ). Two types of fiberlike Si 3 N 4 were obtained, short needlelike fiber and woollike fiber with Fe droplets at 1350°C.