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In situ synthesis of [Ca 24 Al 28 O 64 ] 4+ (4e − ) electride ceramic from C12A7 + C3A mixture precursor
Author(s) -
Li Fan,
Zhang Xin,
Liu Hongliang,
Zhao Jiping,
Xiao Yixin,
Feng Qi,
Zhang Jiuxing
Publication year - 2019
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/jace.16103
Subject(s) - crystallite , thermogravimetry , raman spectroscopy , differential thermal analysis , materials science , absorption (acoustics) , analytical chemistry (journal) , ceramic , in situ , crystallography , mineralogy , chemistry , inorganic chemistry , metallurgy , optics , composite material , physics , chromatography , diffraction , organic chemistry
Inorganic electride [Ca 24 Al 28 O 64 ] 4+ (4e − ) was successfully synthesized via a reaction of Ca 12 Al 14 O 33 (C12A7), Ca 3 Al 2 O 4 (C3A), and Al powder at 1050°C for 5 minutes heated by SPS system. The as‐prepared polycrystalline C12A7:e − electride exhibits an electron concentration of 2.3 × 10 21 cm −3 and an optical absorption bands at 2.5ev under room temperature. Electron concentration was also determined by thermogravimetry ( TG ) and differential thermal analysis ( DTA ). Furthermore, the molecular structure was investigated by Micro Raman measurements; the appearance of the band at 186 cm −1 strongly suggested the formation of C12A7:e − electride. These results not only suggest a novel precursor for fabricating mayenite electrides but also make it possible to produce efficiently the electride in large volume.