PI Details | Co-PI Details |
---|---|
Dr. Sanjeev Kumar
Designation: Professor |
Dr. Arun Kumar Singh
Designation: Professor |
Funding Agency | Project Cost |
---|---|
ER& IPR, DRDO, New Delhi |
Rs. 48,35,500.00 Amount Received till date (in Rs.) Rs. 45,74,042.00 |
Start Date | Completion Date | Status |
---|---|---|
2017-10-06 | 2021-04-04 | Completed |
In this project, we have synthesized a non-Pb piezoelectric system BZT-BCT, which exhibits a very high piezoelectric coefficient (d33) of 512 pC/N at MPB, which is comparable even with high-end PZT. Lead-free BZT-xBCT samples were prepared using the solid-state reaction technique. Structural analysis shows the presence of orthorhombic and tetragonal phases in the prepared samples. We observed that with an increase in x content, the tetragonal phase increases which further results in higher d33. Sintering temperature plays a very important role to achieve desired density, which further leads to good piezoelectric properties.
Meanwhile, we have also introduced a novel method to obtain high piezoelectric coefficient and electromechanical coupling coefficient in BZT-BCT by introducing a novel synthesis procedure. We observed high d33~ 520 pC/N and electromechanical coupling coefficient ~ 57.5% in 0.5BZT-0.5BCT synthesized by novel synthesis procedure.
For energy storage efficiency, we prepared BZT-BCT by sol-gel technique. The different parameters like dielectric constant, dielectric loss, polarization, coercive field, the efficiency of energy storage were found to be optimum for the (1-x)BZT-xBCT ceramics at x =0.55. We estimated the energy storage density W~ 189 mJ/cm3 and high efficiency η ~ 75.6% for BZT-0.55BCT ceramic composition. Therefore, this work suggested that 0.45BZT-0.55BCT ceramics are potential candidates for energy storage capacitor.
Furthermore, we investigated the temperature stability of 5% (Mg1/3Nb2/3)4+ doped BZT-BCT composition at 50kV/cm. We observed Wrec ~ 235 mJ/cm3and ultra-high η~ 94.3% at room temperature. The η of ceramic increases to 94.6% and Wrec to 187 mJ/cm3 as the temperature rises to 110°C.
Manpower Sanctioned/Hired | Manpower Trained |
---|---|
JRF (Nos): 01 |
Ph.D Produced: 02 |
Name of Equipment |
Make & Model |
Year of Purchase |
Cost (Rs.) |
Salient Features of Equipment |
Condition (Working /Not Working) |
---|---|---|---|---|---|
Impedance analyzer, |
Keysight Technologies, E4990A 20-20MHz, |
2018 |
15,05000.00 |
It measures the dielectric constant, dielectric loss, phase, admittance etc. for dielectric samples |
Working |
Electrometer/High Resistance meter, |
Keysight Technologies, 82985A |
2018 |
577000.00 |
It measures the very low currents ~fA and high resistance. |
Working properly and is in use by the research scholars. |
Furnace from room temperature to 800°C with software and computer interface with impedance analyzer and electrometer. |
|
2018 |
762300.00 |
It is used as heater to measure dielectric constant with temperature from room temperature to 800°C |
Working properly and is in use by the research scholars. |
Authors Name |
Title of Paper |
Journal Name |
Volume No. |
Page No. |
Year |
DOI Number |
---|---|---|---|---|---|---|
Rajat Syal, Manoj Kumar, Arun Kumar Singh, Arnab De, O. P. Thakur & Sanjeev Kumar |
Enhancement in the piezoelectric properties in leadfree BZT-xBCT dense ceramics |
J Mater Sci: Mater Electron |
31 |
21651 |
2020 |
|
Rajat Syal, Rahul Goel, Arnab De, Arun Kumar Singh, Gyaneshwar Sharma, O.P. Thakur, Sanjeev Kumar |
Flattening of Free Energy Profile and Enhancement of Energy Storage Efficiency near Morphotropic Phase Boundary in Lead-free BZT-xBCT |
Journal of Alloys and Compounds |
873 |
159824 |
2021 |
|
Rajat Syal, Manoj Kumar, Ramesh Kumar Singh, Gyaneshwar Sharma, Arun Kumar Singh, O. P. Thakur, Sanjeev Kumar
|
Chemical Engineering at Morphotropic Phase Boundary: interplay with thermally stabilized ultra-high energy storage and electrocaloric response
|
Solid State Sciences |
140 |
107190 |
2023 |
|
Authors Name |
Title of Paper |
Name of Conference |
Place |
National/ International |
Page No. |
Year |
DOI Number |
---|---|---|---|---|---|---|---|
Rajat Syal; Rahul Goel; Pankhuri Bansal; Sahil Garg; Arun K. Singh; Sanjeev Kumar |
Ultra-high energy storage efficiency in La-doped BCZT relaxor ceramic |
2022 IEEE 22nd International Conference on Nanotechnology (NANO) |
Spain |
International |
- |
2022
|
10.1109/NANO54668.2022.9928739 |
In this project, we have successfully, synthesized the lead free non-toxic BZT-BCT with high d33 value ~ 500 pC/N. We have also introduced one novel synthesis route to lead free non-toxic BZT-BCT with high d33 value. We have also achieved high energy storage efficiency~ 90% in (Mg1/3Nb2/3)4+ doped BZT-BCT composition. We have published three papers in international journals of repute. Manpower is also trained in this area of lead-free ferroelectrics.