Mandi, Soumen
(2016)
Studies on attaining 0.5(Ba0.7Ca0.3TiO3) -0.5(BaZr0.2Ti0.8O3) morphotrophic composition through multilayer approach.
Masters thesis, Indian Institute of Technology Hyderabad.
Abstract
The discovery of Piezoelectr
icity in Quartz in late 1880 by Curie brothers and its technological
importance in various fields
led to an intense research in this field
up to
the First World War.
Post
First World War
another class of
piezoelectric with perovskite structures
w
as
discove
red
and
popularly
known was BaTiO
3
.
Later the most commercially used
materials
that
ruled the
field of piezoelectric based devices and applications
was P
b
Z
r
0.52
T
i
0.48
O
3
(PZT)
.
I
t was
commercially successful
due to its superior p
iezo
-
coefficient and its hig
h Curie temperature.
Its importance and vast presence in
today’s
modern world can be estimat
ed by this fact that all
major f
erroelectric and piezoelectric devices are made up of
PZT
based compounds. But the
growing awareness about human health and environm
ent led world familiar to the hazard that
is present by using Lead. So, the nee
d for an alternative l
ead free
p
iezoelectrics arose. In 2009
Liu and Ren
reported a Lead free p
iezoelectric material
with
morphotrophic
composition
that
have
p
iezo
-
coefficient v
alue higher than
PZT
.
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