Title: Suitability of Cations Substituted M -Type (Sr-Ba) Hexaferrites for High frequency applications

Abstract:

Effect of rare earth and Divalent (InMn) substitution on the structural electrical and dielectric properties of Sr_0.5-x Ba_0.5In_xMn_yFe_12-yO₁₉,(x = 0.00–0.10; y= 0.00–1.00) Hexaferrites prepared by sol–gel auto combustion is reported. The synthesized samples were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy electrical and dielectric properties (resistivity and conductivity). The X-ray diffraction analysis confirmed single phase M-type hexa-ferrite structure. The lattice parameters were found to increase as In Mn contents increases, which is attributed to the ionic sizes of the implicated cations. The InMn seems to be completely soluble in the lattice. The results of scanning electron microscopy shows that the grain size decreases with increase of In Mn substitution. The increased anisotropy and fine particle size are useful for many applications, such as improving signal noise ratio of recording devices.

Biography:

Dr Hassan Mehmood Khan has completed his PhD at the age of 30 and is working as assistant professor at the Institute of Physics The Islamia University of Bahawalpur Pakistan The fields of interest include Condensed matter Physics. Magnetic Materials, Nanomaterials. (synthesis, characterization and their application studies), nanocrystalline soft ferrites, nanostructured hard ferrites. Microwave and other high frequency applications of Ferrites

Title: Time-Domain benchtop and mobile NMR for liquid & solid material science, pore-size measurement and process monitoring

Abstract:

We discus Time-Domain NMR, as a method of measuring the physical properties of liquid and solid materials. Time-Domain NMR is also a good technique for measuring pore-size distributions from the nano-meter to microns.
When an NMR measurement is made on a sample, the perturbed magnetisation of the nuclei creates a measurable signal that evolves with time. This signal is often then Fourier-Transformed to give spectral information, but for physical information there are many advantages in studying the captured time-domain signal.
Time-Domain NMR is excellent for quantified monitoring of physical change, particularly as a function of some changing parameter such as time or sample temperature. Thus it is a superb tool for material science studies on both liquids and solids and also hence for process monitoring and control.

Biography:

Beau Webber gained his PhD at the University of Kent, UK (thesis : "Characterising Porous Media"). He has published more than 50 papers in refereed journals, and is a called upon referee. He makes use of a wide range of measurement techniques for studying porous materials and liquids contained in them and has made extensive use of Central Facilities neutron scattering instrumentation at Grenoble, Paris and Abingdon, for these studies. He is director of Lab-Tools (nano-science) Ltd. a small UK spin-off research laboratory that performs academic and commercial contract nano- to meso- materials-science research, studying the structure, dynamics and phases of liquids and their solids (and also gas hydrates) in confined geometry and at and near surfaces. Lab-Tools also designs, implements and sells the cutting-edge NMR instrumentation needed to carry out this research, including NMR relaxation spectrometers and NMR cryoporometers.

Title: Opuntia (Cactaceae) as sustainable feedstock for ecological and green materials

Abstract:

Bio-based materials from biomass resources generated a wide use of industrial crops in recent years, and have received potential applications in several sectors, due to the human desire to consume sustainable and ecological products. Opuntia (Cactaceae), were mainly studied as cellulosic resources for their sustainability and cellulose content richness. Cellulosic fibres from Opuntia feedstock was exploited for value-added applications such as (i) fibrous-network reinforcement in composites and paper manufacturing (ii). A green process for cellulosic fibrous-network extraction was used and their morphology, fundamental properties, chemical and structural compositions, was studied. The obtained fibrous-networks were incorporated into PVOH and SBR thermoplastic polymers; their properties towards enhancement, swelling and biodegradability have been studied.

Biography:

Faten Mannai is a Doctor in chemistry, and has a post-doctoral position and one of the researcher members in Materia, Environment and Energy Laboratory in the faculty of Science of Gafsa, Tunisia. She has many scientific papers and chapters in the polymer and bio-based material fields published in international journals and/or with different publisher. Faten has 3 years of professional experience as a professor: (i) 1 year in the faculty of science of Gafsa and (ii) 2 years in preparatory institute for engineering studies of Gafsa, University of Gafsa, Tunisia. He has presented more than abstract on national and international congress, symposium and seminars.