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Preparation of CaF 2 Fibers
Author(s) -
Ota Yoshio,
Inui Saburo,
Iwashita Tetsushi,
Kasuga Toshihiro,
Abe Yoshihiro
Publication year - 1996
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.1151-2916.1996.tb08740.x
Subject(s) - whiskers , aragonite , aqueous solution , crystallite , materials science , composite material , layer (electronics) , chemical engineering , whisker , mineralogy , chemistry , metallurgy , calcium carbonate , engineering
Solid and/or hollow CaF 2 fibers were prepared from aragonite whiskers. Aragonite (CaCO 3 ) whiskers with diameters of ∼2 μm were converted into CaF 2 fibers without deformation by treatment with HF aqueous solution. The resultant CaF 2 fibers were polycrystalline with large specific surface areas of ∼60 m 2. g −i , and they densified when heated at 800°C. The thickness of the CaF 2 reaction layer can be controlled by the concentration of the HF aqueous solution used. Hollow CaF 2 fibers were successfully prepared when CaCO 3 whiskers covered with CaF 2 were leached with HC1.