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Synthesis of Lithium Metasilicate Powders at Low Temperature via Mechanical Milling
Author(s) -
Yang Aixia,
Wang Huijun,
Li Wei,
Shi Jianlin
Publication year - 2012
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.1551-2916.2012.05224.x
Subject(s) - tetraethyl orthosilicate , calcination , materials science , raw material , thermal stability , phase (matter) , ceramic , chemical engineering , grain size , lithium (medication) , orthosilicate , composite material , nanotechnology , chemistry , catalysis , organic chemistry , medicine , endocrinology , engineering
The Li 2 SiO 3 powder has been successfully synthesized at low temperature via mechanical milling process. By using LiOH·H 2 O and tetraethyl orthosilicate ( TEOS ) as raw materials, Li 2 SiO 3 powder with grain size of about 100 nm could be obtained at room temperature (~20°C) after mechanical milling for 120 h. This nano Li 2 SiO 3 powder shows excellent thermal stability that no decomposing reaction or phase change would happen even after calcined at 900°C for 4 h. Experiments show that high concentration of the raw materials is helpful to the forming of Li 2 SiO 3 phase. When the concentration of the raw materials is too low, no Li 2 SiO 3 phase could be obtained. The investigation also shows that small content of B 2 O 3 could accelerate the densifying speed of Li 2 SiO 3 ceramics and decrease the thermal stability of Li 2 SiO 3 phase.