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Synthesis, Densification, and Phase Evolution Studies of Al 2 O 3 –Al 2 TiO 5 –TiO 2 Nanocomposites and Measurement of Their Electrical Properties
Author(s) -
Somani Vikas,
Kalita Samar Jyoti
Publication year - 2007
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.1551-2916.2007.01797.x
Subject(s) - nanocomposite , materials science , calcination , phase (matter) , alkoxide , titanate , chemical engineering , dielectric , ceramic , composite material , catalysis , biochemistry , chemistry , optoelectronics , organic chemistry , engineering
Alumina–aluminum titanate–titania (Al 2 O 3 –Al 2 TiO 5 –TiO 2 ) nanocomposites were synthesized using alkoxide precursor solutions. Thermal analysis provided information on phase evolution from the as‐synthesized gel with an increase in temperature. Calcination at 700°C led to the formation of an Al 2 O 3 –TiO 2 nanocomposite, while at a higher temperature (1300°C) an Al 2 O 3 –Al 2 TiO 5 –TiO 2 nanocomposite was formed. The nanocomposites were uniaxially compacted and sintered in a pressureless environment in air to study the densification behavior, grain growth, and phase evolution. The effects of nanosize particles on the crystal structure and densification of the nanocomposite have been discussed. The sintered nanocomposite structures were also characterized for dielectric properties.