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P4: Nano-layer Barium Titanate Adaptive High Frequency Dielectric-Permittivity

Project Leader

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. Assoc. Prof. Dr.-Ing. Oskar Hasdinor Hassan 
. Deputy Dean (Research & Innovation)
. Faculty of Art & Design
  Universiti Teknologi MARA (UiTM)
  Shah Alam, Selangor, 40450, Malaysia
. oskar@salam.uitm.edu.my
. +603-55448136

Research Members

Modified Barium Titanate nano-ceramics layer, BaTiO3 (BT), is proposed to be synthesized, while the crystal growth effects to the dielectric-permittivity high frequency performance at room temperature are to be analyzed. Barium titanate compounds are of important interest due to its high dielectric-permittivity for advanced electronic and optical devices. However, their crystallite size that is dependent on the synthesis route and sintering temperatures influences the perovskites structures and properties of conventional barium titanate. This leads to the decrease in dielectric-permittivity of grain and grain boundaries of barium titanate at high frequencies. In this work, the behavior of grains and grain boundaries a nano-structured perovskite-type of Ba1-xM’xTi1-yM’’yO3-∂ modified by M’=La, Nd and M’’=Sn, Tm, will be studied using forecasting model of a robust estimators hybrid with nonlinear artificial neural network time series. The forcasted behaviour then will be used to synthesis to increase the dielectric-permittivity at high frequency. The role of rare earth cations substitution to the Ba2+ sites is to stabilize the tetragonality of perovskites structure.

To determine the behavior of grains and grain boundaries of modified BTO.

To confirm the dielectric-permittivity performance of modified solid solution BaTiO3 by incorporating the investigated factors of crystal growth and structural changes during sintering.

To determine the solid solubilty of of the cations in BTO

To determine the physical and chemical deposition parameter

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Publication

 

2017


 
All-solution process flexible nanocomposite generator made of BaTiO3 nanoparticles and graphene quantum dots
Micro and Nanoelectronics (RSM), 2017 IEEE Regional Symposium on
Access to document: https://doi.org/10.1109/RSM.2017.8069163

 

2016


 
Experimental and First-Principles Investigations of Lattice Strain Effect on Electronic and Optical Properties of Biotemplated BiFeO3 Nanoparticles
The Journal of Physical Chemistry C 120 (45), 26012-26020
Access to document: https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.6b08548


 
Structural, Electronic and Optical Properties of BaTiO3 and BaFeO3 From First Principles LDA+ U Study
Int. J. Electroactive Mater 4, 14-17
Access to document: http://www.electroactmater.com/IJEM/volume4/IJEM-18-11-16-MI9/

 

2015


 
Low-energy Phases, Electronic and Optical Properties of Bi1-xLaxFeO3 solid solution: Ab-initio LDA+U Studies
Ceramics International, 2015
Access to document: https://doi.org/10.1016/j.ceramint.2015.05.037


 
Self-interaction corrected LDA+ U investigations of BiFeO3 properties: plane-wave pseudopotential method
Materials Research Express 2 (11), 116101
Access to document: http://iopscience.iop.org/article/10.1088/2053-1591/2/11/116101

 

 2014


 
Influences of Epitaxial Strain and Volume on BaTiO3: Ab Initio Total Energy Calculation
Integrated Ferroelectrics, An International Journal, 2014
Access to document: https://doi.org/10.1080/10584587.2014.905350