A5077330918- Ferroelectric and Piezoelectric Materials
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Electrocatalysts for Energy Conversion
- Aluminum Alloys Composites Properties
- Electronic and Structural Properties of Oxides
- Advanced Photocatalysis Techniques
- Ultrasonics and Acoustic Wave Propagation
- Dielectric materials and actuators
- Microwave Dielectric Ceramics Synthesis
- Transition Metal Oxide Nanomaterials
- Copper-based nanomaterials and applications
- Powder Metallurgy Techniques and Materials
- Fuel Cells and Related Materials
- Aluminum Alloy Microstructure Properties
- Additive Manufacturing and 3D Printing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Inorganic Chemistry and Materials
- Bauxite Residue and Utilization
- Ammonia Synthesis and Nitrogen Reduction
- Advanced ceramic materials synthesis
- Ultrasound Imaging and Elastography
Rutgers, The State University of New Jersey
2013-2020
Analytical Services
2020
Argonne National Laboratory
2020
Rutgers Sexual and Reproductive Health and Rights
2016
Iran University of Science and Technology
2008
Imam Khomeini International University
2008
Electromechanical properties and high power characteristics of Pb ‐free hard piezoelectric ceramics in the ( BiN a 0.88 K 0.08 Li 0.04 ) 0.5 Ti 1− x Mn O 3 = 0, 0.014, 0.015, 0.016) system were studied. doping resulted considerable enhancement mechanical quality factor Q m vibration velocity. The lowest dielectric losses achieved 1.5 mol% ‐doped with planar about 970 tanδ 0.89%. heat dissipation resonance frequency shift under drive condition remarkably suppressed upon doping. maximum...
Piezoelectric materials have been vastly used in ultrasonic transducers for medical imaging. In this paper, firstly, the most promising lead-free compositions with perovskite structure imaging applications reviewed. The electromechanical properties of various ceramics, composites, and single crystals based on barium titanate, bismuth sodium potassium niobate, lithium niobate are presented. Then, fundamental principles design considerations briefly described. Finally, recent developments...
We have studied the processing and electromechanical properties of Mn Fe‐doped 0.88[Bi 0.5 Na TiO 3 ]–0.08[Bi K ]–0.04[Bi Li ] piezoelectric ceramics prepared by mixed oxide route. Different amounts (0.01, 0.014, 0.015, 0.016, 0.017, 0.02, 0.022) or Fe (0.0125, 0.0175) were doped to this lead‐free composition. Ceramics sintered at different temperatures (1075°C–1150°C) achieve highest density mechanical quality factor. doping resulted in a considerable enhancement Q m both planar thickness...
This paper discusses the fabrication and characterization of 3.5-MHz single-element transducers for therapeutic applications in which active elements are made hard lead-free BNT-based commercial PZT (PZT-841) piezoceramics. Composition (BiNa0.88K0.08Li0.04)0.5(Ti0.985Mn0.015)O3 (BNKLT88-1.5Mn) was used to develop piezoelectric ceramic. Mn-doped samples exhibited high mechanical quality factor ( ) 970, thickness coupling coefficient 0.48, a dielectric constant 310 (at 1 kHz), depolarization...
A novel dual photoabsorber interface: perovskite oxynitride (SrNbO 2 N) deposited on silicon (100), and a H ER catalyst (Ni 5 P 4 or Ni P)-silicon, are fabricated. Titanium nitride (TiN) is introduced as blocking layer between Sr Nb O 7 Si which produces clean interfaces. During the high temperature ammonolysis step needed to convert SrNbO N, it effective at (but not Sr) migration. half-cell cathode with P)-photoabsorber interface approaching best-in-class overpotentials for films : 211mV vs...
The effect of Mn and Fe dopants on the electromechanical electrochemical properties 0.88[Bi0.5Na0.5]TiO3–0.08[Bi0.5K0.5]TiO3–0.04[Bi0.5Li0.5]TiO3 piezoceramic is investigated with particular emphasis complex impedance in temperature range from 450 to 600 °C. spectra have been simulated equivalent circuits order extract bulk grain boundary characteristics determine activation energies conduction. considerably enhance mechanical quality factor decrease dielectric loss compared undoped...
Inexpensive earth-abundant catalysts are required to accelerate both the oxidative and reductive half reactions for electrolysis of water. Using natural enzymes as models, such CaMn 4 O 5 cubane motif in water oxidizing complex photosystem II Ni-S active site Ni-Fe hydrogenase, we previously developed cubic LiCoO 2 nickel phosphides that mimic their chemistry, respectively. Here prepared thin films spinel – LiCo , (water oxidation) oxygen evolving reaction (OER), Ni P hydrogen (HER) on Au...
In this paper, the processing and electrocmechanical of Mn-doped BNT-based ceramics prepared by mixed oxide route have been studied. Different amounts Mn (0.01, 0.014, 0.015, 0.016, 0.017, 0.02, 0.022) were doped to 0.88[Bi <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.5</sub> Na TiO xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ]-0.08[Bi K ]-0.04[Bi Li ] ceramics. Samples sintered at different temperatures (1075-1150 °C) achieve...
Choice catalysts are required to lower the activation barriers for both oxidative and reductive half reactions associated with electrolysis of water. Using models provided by natural systems, such as Ca-Mn cubane motif in water oxidizing complex photosystem II Ni-S active site hydrogenase, we have developed Li M O 2 ( = Transition metal) 1 Ni-P compounds which mimic their chemistry . Thin films oxygen evolving reaction (OER) catalyst, cubic Co), hydrogen (HER) Ni x P y , a potentially...
Current photoelectrochemical devices for water electrolysis suffer from low stability and efficiency. Aims to address both those needs have been realized using a system that uses two sequential solar light absorbers (semiconductors) — in conjunction with oxygen evolution reaction (OER) hydrogen (HER) catalysts. Each absorber has built-in electric field (band-bending) achieved by doping allow matching of valence (VB) conduction (CB) band energy levels the electrochemically required OER HER...