Abstract
TiO
2
(
x
)
–
CeO
2
(
1
-
x
)
nanocomposites were prepared at low
TiO
2
composition of 5, 10, 15 and 20%, by using
TiO
2
and
CeO
2
nanoparticles obtained by polymeric citrate precursor method. These nanocomposites were characterized by using powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy dispersive analysis of X-rays and BET surface area studies. BET studies showed the specific surface area of as-prepared nanocomposites in the range of 239–288
m
2
g
-
1
. Twenty percent of
TiO
2
-based titania–ceria nanocomposites have smallest average particle size of 30 nm and highest surface area of 288
m
2
g
-
1
among all the as-prepared nanocomposites. The dielectric characteristics were measured as a function of frequency and temperature. The dielectric constant of
TiO
2
(
x
)
–
CeO
2
(
1
-
x
)
at room temperature was 35.6 (maximum) at 500 kHz for
x
=
0.20
.