Advanced Materials Research Vol. 1024

Abstract: Theoretical review on magnetic energy conception is still crucial since the recent discourse emerged in various conceptual speculations that lead into inconsistency in mathematical expression. The coming study should direct its formula into an interoperable equation which enables a magnetic energy to be observed as a mechanical work. The forthcoming expression of magnetic energy should represent operation of mechanical work definitely, considering the usage of Permanent Magnet (PM) in numerous mechanical devices. This interoperable magnetic-mechanical equation would be formulated from energy balance principle applied in both magnetic boundary and mechanical boundary. The energy balance assessment would clarify the usage of magnetic energy during the action of mechanical work. A computational study would assist this observation to interpret some magnetic parameters such as flux density B, magnetic strength H, magnetic energy E_m on a self-engineered device named Frequent Flux Collider which examines PMs to be attracted and repelled frequently. The research objectives are: 1) Presenting the technique for assessing the energy balance in PM; 2) Proposing an interoperable equation for bridging magnetic energy and mechanical work. In conclusion, the assessment has brought a theoretical hint to the development of interoperable magnetic-mechanical formula.

Abstract: The study on electrical properties for both 2,3,7,8,12,13,17,18-octaethyl-21,23H-porphine Cu (II) (Cu-porphyrin) and 2,3,7,8,12,13,17,18-octaethyl-21,23H-porphine (porphyrin) thin film, which were fabricated using spin coating method was conducted. Porphyrins were diluted with chloroform of various concentrations (0.05 mg/ml, 0.1 mg/ml, 0.5 mg/ml, 2.0 mg/ml and 3.0 mg/ml). The solution was spin coated on top of glass substrates. A layer of aluminum was evaporated on top of the organic thin film through thermal evaporation and shadow mask was placed on top of the organic thin film where two electrodes with a gap of 50 μm were formed. Surface morphology of the organic thin film was observed by scanning electron microscope (SEM) and profilometer. Different concentrations of organic solutions greatly affected the molecular packing and arrangement order of the organic thin film and thickness of the organic layer and eventually affected electrical properties of the devices.

Abstract: Thermoelectric cells and Solar cells are source of harvesting energy from heat and light respectively. In this study both are fabricated on a single cell using n-Si and p-Si single crystal strips.Later, temperature gradient cells are also fabricated . The fabricated Phtoto-thermoelectric cells and Temperature gradient celss are investigated, showing improvement in seebeck effect.

Abstract: Polymer ceramic composite materials are candidate material for capacitor application. In this research, MWCNT and BaTiO₃ were used as fillers in epoxy thin film composites where the filler loading was in the range of 0 to 2.0 vol%. The thin film composites were fabricated by using spin coating method. The dielectric constant and dielectric loss were measured at 100 Hz to 1 MHz. The dielectric constant of CNT was in the range of 3.5 to 243.7 whereas the dielectric constant of BaTiO₃ was 3.5 to 33.7 at 1 kHz. Meanwhile the dielectric loss of MWCNT was 0.009 to 6.83 while dielectric loss of BaTiO₃ was 0.009 to 0.016 at 1 kHz. In general, it was found that MWCNT filler provide high dielectric constant value compare to BaTiO₃ this is because MWCNT is more conductive than BaTiO₃. However MWCNT/epoxy composites exhibit higher dielectric loss compare to BaTiO₃/epoxy composites.

Abstract: In this study, Cerium (Ce) and Praseodymium (Pr) containing lead silicate glasses were produced with 2 different weight percentage (low 0.2 wt% and high 0.4 wt% content). The presence of Ce and Pr in the glass mixture might be expected to alter the structural and leaching glass properties. The radiation shielding properties of the synthesized glasses is explained in the form of lead equivalent study. The FTIR (Fourier Transform Infrared Spectrometer) was performed as to observe the structural changes of the synthesis glasses at 1.5 Gy gamma radiation exposures. Leaching study is performed by ICP (Inductively coupled plasma spectrometry) analysis.