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Synthesis of Nanocrystalline Enstatite Fiber Via Alkoxide Sol–Gel Process
Author(s) -
Tsai MuTsun
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.1551-2916.2005.00359.x
Subject(s) - enstatite , sol gel , nanocrystalline material , alkoxide , materials science , amorphous solid , acetic acid , chemical engineering , fiber , polymer chemistry , composite material , mineralogy , chemistry , organic chemistry , nanotechnology , chondrite , catalysis , physics , meteorite , astronomy , engineering
An alkoxide sol–gel route to precursors to transparent enstatite fibers is described. The fibrous gels were drawn from acetic acid‐modified viscous solutions. The amount of acetic acid was found to be the crucial factor in the spinnability. Infrared studies indicated that the acetate anion behaved as a ligand and modified the molecular structure of the enstatite gel. The fibrous gel was amorphous after drying by X‐ray, and began to convert to enstatite at temperature as low as ∼600°C. The enstatite fibers were nanocrystalline up to 1100°C. At 1300°C, transparent and dense enstatite fibers were produced, with the room temperature dielectric constants of around 5.2–5.8 (at 1 MHz).