A5000539209- Microwave Dielectric Ceramics Synthesis
- Ferroelectric and Piezoelectric Materials
- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Nuclear materials and radiation effects
- Dielectric materials and actuators
- Dielectric properties of ceramics
- Lanthanide and Transition Metal Complexes
- Multiferroics and related materials
- Electromagnetic wave absorption materials
- Radiation Detection and Scintillator Technologies
- Advanced ceramic materials synthesis
- Perovskite Materials and Applications
- Radiation Shielding Materials Analysis
- Luminescence and Fluorescent Materials
- Advancements in Solid Oxide Fuel Cells
- Ammonia Synthesis and Nitrogen Reduction
- Metallurgical and Alloy Processes
- Crystal Structures and Properties
- Quantum Dots Synthesis And Properties
- Material Science and Thermodynamics
- Synthesis and properties of polymers
- Advanced materials and composites
- Gas Sensing Nanomaterials and Sensors
- Microwave and Dielectric Measurement Techniques
University of Kerala
2019-2025
National Institute for Interdisciplinary Science and Technology
2007-2010
Council of Scientific and Industrial Research
2009
Institute of Minerals and Materials Technology
2006
Development of a low‐temperature sintered dielectric material derived from Li 2 MgSiO 4 (LMS) for cofired ceramic (LTCC) application is discussed in this paper. The LMS ceramics were prepared by the solid‐state route. calcination and sintering temperatures optimized at 850°C/4 h 1250°C/2 h, respectively, best density properties. crystal structure microstructure studied X‐ray diffraction scanning electron microscopic methods. microwave properties measured cavity perturbation method. had ɛ r...
Cerium oxide (CeO 2 ) filled polytetrafluoroethylene (PTFE) composites prepared by powder processing technique for microwave substrate application is presented in this paper. The PTFE used as the matrix and dispersion of CeO composite varied up to 0.6 volume fraction, dielectric properties were studied at 1 MHz frequencies. relative permittivity loss increased with increase content. For fraction loading ceramic, has ɛ r 5 tan δ 0.0064 7 GHz. Different theoretical approaches have been...
The effect of glass additives on the microstructure, densification, and microwave dielectric properties cerium oxide for low‐temperature co‐fired applications was investigated. Different weight percentages quenched such as B 2 O 3 , –SiO Al ZnO–B BaO–B MgO–B PbO–B 2MgO–Al –5SiO LiO–B Bi –ZnO–B LiO–MgO–ZnO–B were added to CeO powder. crystal structure ceramic–glass composites studied by X‐ray diffraction, microstructure scanning electron microscopy, phase composition using energy‐dispersive...
The ATiO 3 (A=Co, Mn, Ni) dielectric ceramics have been synthesized by the conventional solid‐state ceramic route. structure and microstructure of these samples studied using powder X‐ray diffraction scanning electron microscopy. microwave properties such as relative permittivity (ɛ r ), quality factor ( Q u × f coefficient temperature variation resonant frequency (τ ) measured in range 4–6 GHz resonance methods. constant varies from 19 to 25 τ close −50 ppm/°C. high‐quality factors 62 500...
Abstract Cerium oxide‐filled high density polyethylene (HDPE) composites for microwave substrate applications were prepared by sigma‐blend technique. The HDPE was used as the matrix and dispersion of CeO 2 in composite varied up to 0.5 volume fraction, dielectric properties studied at 1 MHz frequencies. variations thermal conductivity ( k eff ), coefficient expansion (α c ) Vicker's microhardness with fraction filler also measured. relative permittivity (ε loss (tan δ) found increase...
A new low‐permittivity polymer–ceramic composite for packaging applications has been developed. The ceramic‐reinforced polyethylene and polystyrene composites were prepared by melt mixing hot molding techniques. Low‐loss, Li 2 MgSiO 4 (LMS) ceramics the solid‐state ceramic route used as filler to improve dielectric properties of composites. relative permittivity loss increased with increase in loading at radio microwave frequencies. mechanical thermal conductivity ‐reinforced also...