A5051092141- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Multiferroics and related materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Acoustic Wave Resonator Technologies
- Advanced ceramic materials synthesis
- Luminescence Properties of Advanced Materials
- Dielectric properties of ceramics
- ZnO doping and properties
- Magnetic and transport properties of perovskites and related materials
- Perovskite Materials and Applications
- Dielectric materials and actuators
- Electronic and Structural Properties of Oxides
- Advanced Photocatalysis Techniques
- Magnetic Properties and Synthesis of Ferrites
- Electromagnetic wave absorption materials
- Copper-based nanomaterials and applications
- Nanotechnology research and applications
- Graphene research and applications
- Ga2O3 and related materials
- Carbon Nanotubes in Composites
- Nanomaterials for catalytic reactions
- Electrical and Thermal Properties of Materials
- Surface Treatment and Coatings
Universidad de Valladolid
2025
NED University of Engineering and Technology
2011-2024
Bridge University
2023
Dawood University of Engineering and Technology
2021
University of Sheffield
2016-2020
Sheffield Hallam University
2016
Abstract Lead‐free piezoceramics with the composition (1−x)(K 1− y N a )NbO 3 ‐x(Bi 1/2 Na )ZrO ( KN yN‐ xBNZ ) were prepared using conventional solid‐state route. X‐ray diffraction, Raman spectroscopy, and dielectric measurements as function of temperature indicated coexistence rhombohedral (R) tetragonal (T) phase, typical morphotropic phase boundary MPB BNZ concentration increased by adjusting K/Na ratio. High remnant polarization P r =24 μC/cm 2 ), piezoelectric coefficient d 33 =320 pC...
In the present study, pure, Co, Gd, and Co/Gd di-doped ZnO nanoparticles were synthesized via co-precipitation synthesis route. The prepared samples characterized through different techniques such as X-ray diffraction method (XRD), scanning electron microscopy (SEM), UV-Vis spectroscopy, photoluminescence (PL)spectroscopy, an impedance analyzer vibrating sample magnetometer (VSM). XRD pattern shows ZnO’s wurtzite hexagonal crystal structure; moreover, shifting of characteristic peaks toward...
Lead-free ceramics with the composition 0.91K1/2Bi1/2TiO3–0.09(0.82BiFeO3-0.15NdFeO3-0.03Nd2/3TiO3) were prepared using a conventional solid state, mixed oxide route. The exhibited high strain of 0.16% at 6 kV mm−1, stable from room temperature to 175 °C, variation <10%. materials fabricated into multilayer structures by co-firing Pt internal electrodes. prototype actuator constant strains up 300 °C ∼15%. showed fatigue resistant behaviour in both monolithic and form after bipolar...
Abstract Novel scheelite‐type [Ca 0.55 (Nd 1‐ x Bi ) 0.3 ]MoO 4 (0.2 ≤ 0.95) ceramics were prepared using the solid‐state reaction method. According to X‐ray diffraction data, a solid solution was formed in 0.2 0.95 and all samples belong pure scheelite phase with tetragonal structure. As revealed by Raman spectroscopy, number of vibrational modes decreased increase value, which further indicated that 3+ ions occupied A‐site value increased, sintering temperature from 740°C 660°C;...
The β-Ga 2 O 3 ceramic exhibits excellent dielectric properties with a Q × f of 133 140 GHz and ε r 9.57. A sub-6 patch antenna was designed fabricated using Ga substrate, showing great potential for high-frequency applications.
Microwave dielectric ceramics with permittivity (εr) ∼ 20 play an important role in massive multiple-input multiple-output (MIMO) technology 5G. Although fergusonite-structured materials low loss are good candidates for 5G application, tuning the temperature coefficient of resonant frequency (TCF) remains a problem. In present work, smaller V5+ ions (rV = 0.355 Å, coordination number (CN) 4) were substituted Nb5+ (rNb 0.48 Å CN Nd(Nb1-xVx)O4 ceramics, which, according to situ X-ray...
Abstract Microwave dielectric ceramics with intrinsic low sintering temperatures are potential candidates for temperature co‐fired technology. In the present work, (Li 0.5 Y )MoO 4 ceramic tetragonal scheelite structures was selected to improve microwave properties of BiVO ceramics. As proved by X‐ray diffraction (XRD) results, structured solid‐solution were formed x value ≤0.1 in (Bi 1− Li )(V Mo )O . situ XRD results further confirmed that addition also lowered transition from distorted...
Abstract The recent interstellar detection of individual polycyclic aromatic hydrocarbons (PAHs) in the dense molecular cloud TMC-1 brings with it interest related species that could be present this astronomical environment. PAHs detected consist a few pure while majority have been are their cyano-derivative counterparts due to larger dipole moment components. Bowl-shaped PAHs, such as sumanene (C21H12), represent another important target for radio astronomy they very polar species, spite...
The replacement of PZT with a PbO-free alternative is the subject intense investigation worldwide. In this research, cheap reliable methodology for fabrication multilayers (MLs) lead-free potassium sodium niobate (KNN)-based ceramics presented without need vacuuming and/or hot isostatic pressing tape. thickness per active layer was 193μm and 102μm 10 16 MLs actuators, respectively. Effective d33 (piezoelectric coefficient), effective d33*, bi-polar strain (Smax), max displacement, dielectric...
Antimicrobial resistance (AMR) is a critical health challenge worldwide, that arises when bacteria, viruses, fungi, and parasites become resistant to antimicrobial medications, making diseases more challenging treat. The enzymatic breakdown of antibiotics, modifications target locations, elevated efflux pumps, changes in cell membrane permeability are some the processes behind AMR. A key factor development transmission AMR has been unregulated use livestock feed for preventive purposes....