Application Of Nano particles in Ferroelectric Materials

1. Bansilal Ramnath Agarwal Charitable
Trust's
Vishwakarma Institute Of Technology
Name Of Student: Rucha Satish Dhavale
Subject : Nano Science & Nano Technology
Name Of Guide: Dr. Sachidanand Satpute
Date: 20/07/2021
F.Y. M.Tech(chemical Engineering)
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2. Seminar Presentation
Application Of Nano particles in
Ferroelectric Materials
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3. What is Nano particles?
What is ferroelectric
materials?
What is history of it?
Microwave device, dynamic capacitors, optical wavegui
de
What is your objective?
Basics
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4. Characteristics of ferroelectric mat
erial
01
02
03
04
Reversible polarization
Anomalous property
Dielectric non-linear
Extreme high dielectric
constant
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5. Ferroelectric materials & why Nano mate
rials
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Ok to excellent:
 used in catalysis to boos
t chemical reactions
 reduces the quantity of
catalytic materials,
 saving money
 Reduce waste
 reducing pollutants.
Ferroelectric materials:
Lead titanate,
Potassium hydrogen
phosphate,
Rochelle salt
etc.
.
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6. Chemical
method
Physical
method
Physical-
chemical
method
Biological
method
Methods of production Nano-ferroele
ctric materials
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7. Chemical method
1
3
2
Solid state reaction
• Preparation method of Nano crystalline &
poly crystalline solid
• Temperature – 1000 -1500 degree cel.
• reaction condition, structural property,
• Surface area & reactivity
Molten salt method
• Salt & reactant mixed
together
• Heating range above to
the MP of salt
• molten salts are act as
solvent or addictive
which increase rate of
solid state reaction
sol-gel method
• Solid materials from small molecules
• Monomers are converted into
colloidal solution
• Precursor are colloidal solution &
mostly they are metal oxides 7

8. Physical method
Grinding operation
 Size reduction process
 Working principle- rubbing or friction
Dry grinding
 Moisture should be less than
1%
 Feed should not come
in contact with air
Wet grinding
 Required large amount of
water
 Continuous pumping system
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9. Biological method
Green
synthesis
Utilizatio
n of micr
o
organism
s
like yeast
s, fungi,
bacteria
Use of
plant &
plant
extract
Use of
templates
like
DNA,
membrane
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10. Structure /shape of nanoparticles
Nanotube
Nano crystal
Dense polycrystalline aggregat
es of Nano crystals ( 80nm)
Polyhedral hexagonal
spherical nanoparticles
Nano fiber & Nano
powder
01
02
03
04
05
06
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11. Application on the basis of chemical
method
Method of synthesis &
characterization
Chemical method (Solid-state reaction)
 temperature 400–8000C
 time 2-4 hr
 Nano crystalline Titanium dioxide , ultrafine
Barium carbonate
 intensively mixed in an aqueous suspension for 24 hr
 using polyethylene jar media.
characterization methods
 Nanoparticle size is 70 nm.
 Specific surface area up to 15m2/g,
 X-ray diffraction analysis, Scanning Electron
Microscopy 11

12. Application on the basis of biological
method
Characterization:
 8-21 nm,
 single-phase hexagonal structure;
 XRD, Transmission Electron
Microscopy (TEM)
Biological method:
 biosynthesis of BaTiO3
nanoparticles
 solid state synthesis BaTiO3
 Slurry BaTiO3 + yeast culture drug and
gene
delivery
Bio detection
of
pathogens
Detection
of proteins
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13. Case Study
Nano materials of ferroelectric polymers with surfa
ce-hydroxylated
barium titanate (BaTiO3) nanoparticles for energy
storage applications
“
“
www.rsc.org/materials
Cite this: J. Mater. Chem., 2012, 22, 11196
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14. introduction
The energy stored in a capacitor
depends on the effective permittivity o
f the dielectric material between the pla
ts of the capacitor as well as the operati
ng
voltage of the capacitive device
Hence it is essential to develop such
material which have demands of a
higher dielectric constant to increase
the device capacitance, and a higher
dielectric breakdown strength to
increase the device operating voltage.
 Organic materials (polymers)exhibit
relatively low permittivity.
 On the other hand, inorganic material
exhibit low electric breakdown field
strengths and higher leakage currents com
pared to organic materials
 Fabrication, optimization & integratio
n
of hybrid Nano composites are currently
active areas of research towards the
exploration of high energy density
materials.
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15. Why for energy storage?
- at high filler loadings, the increase in particle packing density can lead to percolat
ive
pathways through aggregated fillers.
- hence it increase the leakage current and lower the dielectric break down strengt
h
of the nanocomposites.
- To maximize energy storage, the effective permittivity can only be increased by
low leakage currents.
- that’s why they use high density surface hydroxylation of BaTiO3 nanoparticles o
n
the performance of inorganic–organic hybrid nanocomposites consisting of BaTio
3
nanoparticles embedded in a P(VDF-TrFE) matrix For energy storage application.
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16. Material
• BaTiO3 nanoparticules, avg. size 90 nm,
• Poly(vinylidene fluoride trifluoroethylene) P(VDF-TrFE)
• Methyl ethyl ketone (MEK) used as the solvent
• Hydrogen peroxide
Hydroxylation of barium titanate nanoparticles
 200 mg of barium titanate (BaTiO3) Nano powder is refluxed in 80 mL of an aqueous solution of
hydrogen peroxide (H2O2) at 106 C for 4 h.
 Filtration
 washed with deionized (DI) water
Preparation of barium titanate–P(VDF-TrFE) nanocomposite capacitors
 200 mg and 600 mg of P(VDF-TrFE) were dissolved in 10 mL MEK, containing 20 vol.%
 To prepare the 30 vol.% solution, 165 mg of BaTiO3 powder was added to 600 mg of
P(VDF-TrFE) dissolved in MEK
 Separation by filtration
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17. Characterization
• The structure and properties of BaTiO3 nanoparticles were
studied using Fourier transform infrared spectroscopy
• The morphology of the films was investigated by scanning
electron microscopy
• Frequency-dependent capacitance was measured with an
Agilent LCR meter
• For I–V characterization using a Keithley 4200-Semiconductor
Characterization System
Characterization
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18. Results and discussion
• Three main absorption bands at 550 cm1,1442
cm1 and 3433 cm1 are observed.
• The band at 550 cm1 is Ti–O bond vibration
in BaTiO3
• 1442 cm1 is assigned to the stretching
vibrations of –CO3
-It show the surface morphology of P(VDFTrFE)–BaTiO3
nanocomposites containing 10 vol.%.
-The estimated average size of the nanoparticles is 80 nm
-untreated BaTiO3 nanoparticles tend to form agglomerates.
These agglomerates could potentially cause higher leakage
currents under an applied electric field.
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19. conclusion
• Demonstration of an effective method to improve the perfor
mance of Barium titanate–P(VDF-TrFE) Nano composite
capacitors using surface hydroxylation of BaTiO3 nanoparti.
• better dispersion of the nanoparticles in the polymer matrix
resulting in a higher degree of particle–matrix interaction.
• Nano composites containing hydroxylated BaTiO3
Nano fillers exhibited significantly lower leakage current
densities & enhancement in the effective permittivity and
dielectric breakdown strength.
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20. Referen
ces
• Kalinin, S.V, “Nano materials of ferroelectric polymers
with surface-hydroxylated barium titanate (BaTiO3)
nanoparticles for energy storage applications.” Annual Revie
w of Materials Research,(2007).
• Basun, S.A, Cook, G., Reshetnyak, “Dipole moment
and spontaneous polarization of ferroelectric nanoparticles in
a nonpolar fluid suspension.’’ Physical Review B84, (2011).
• https://en.wikipedia.org/wiki/Nanoparticle
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21. Thank You !
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