Research Publications

Academic theses and dissertations are regularly published and widely disseminated in YUOE Journal, Monographs, Universities Research Journal (URJ), Myanmar Academy of Arts and Science (MAAS) Journal, AsTEN Research Journal and International online Journals for sharing knowledge and contributing to the development of our education.

Myanmar Academy of Art & Science List of Research

No. Researcher Title Abstract Year
81 Hnin Hnin Hlaing THEORETICAL INTERPRETATION ON D(, K)X INCLUSIVE MISSING MASS SPECTRUM OF -PARC E-2 EXPERIMENT In this research work, the inclusive missing-mass spectrum of D(+, K+)X reaction at J-PARC E-27 experiment have been studied. JPARC E27 experiment was conducted to search for the simplest kaonic nuclear bound state by using D(+, K+)X reaction at the beam momentum of 1.7 GeV/c. In the E-27 experiment, high energy pion is incident upon deuteron target and interacts with neutron in the target to produce K , K and p. Due to the strong attractive force between K and p, * = (1405) is formed as a doorway state to populate K pp. The missing mass spectrum obtained from E-27 experiment at J-PARC has covered energy regions of quasi free -p, -p, *-p, *-p production and pp K bound state. The missing mass spectrum of D(+, K+)X reaction covering all the above energy regions have been analyzed by using Greens function method. 2018
82 Htet Naing Lwin STUDY ON TEMPERATURE DEPENDENT ELECTRICAL PROPERTIES OF COALT-INC NANOFERRITES Spinel ferrites have been studied extensively because they play a vital role in the technological applications. In the present work, Cobalt-inc nanoferrites, Co1-xnxFe2O4 (where x = 0.0, 0.1, 0.2 and 0.3) have been prepared by auto-combustion method. Structural and microstructural properties of the samples were characterized by X-ray diffraction (XRD) and Scanning Electron Microscope (SEM) to investigate the single phase nanosized ferrites and morphological features of grain shape, grain size and homogeneity. Variation of the dc electrical resistivities of the Cobalt ferrites with the different concentrations of inc was observed by a simple two probe method. Temperature dependent electrical conductivities of the samples were investigated in the temperature range of 303 K – 773 K. The activation energies (Ea) of the samples were evaluated by using the slopes of ln? -1000/T relationships. 2018
83 Khin Moe War ELEMENTAL ANALYSIS OF RICE HUSK ASH USING EELEMENTAL ANALYSIS OF RICE HUSK ASH USING EDXRF METHOD In this paper, the effect of the different calcinating temperature of rice husk ash (RHA) was studied. Especially the silica content in the RHA was investigated. Rice Husk was collected from rice milling plants of Hlae Gu township, Yangon Region and Pathein township, Ayeyarwaddy Region. For obtaining the pure rice husk, the sieve analysis was done for removing the sand and other impurities. After that the RHA is obtained by calcinating of rice husk at 500 ?C, 600?C, 700?C and 800?C respectively for two hours. After that the calcined mass of the different RHA samples was weighted by electronic scientific balance. It was shown that the decreases in mass with increasing calcinating temperature from 500?C to 800?C. Then, each calcinated samples were taken for EDXRF analysis to measure the elemental concentration. According to the results, it was found that the major element, silicon (Si) was contained nearly 80% in each sample at different temperature. The formed rice husk ash is treated with Sodium hydroxide (NaOH) and Hydrochloric acid (HCl) to produce silica. The percentage of extracted silicon lies around 60 %. 2018
84 Theint Wah Wah Khaing PREPARATION AND CHARACTERIATION OF SnO2 NANORODS AT DIFFERENT TEMPERATURES es via chemical bath deposition (CBD) method. SnO2 nanorods were prepared by immersing SnO2 seed layer coated FTO glasses into the aqueous solution. After fabrication process, the substrates were annealed at different temperatures and SnO2 nanorods were formed. And then, SnO2 nanorods were characterized by X-ray diffraction to observe crystal structure. Rods diameter and morphological properties at different temperatures were carried out from SEM analysis.SnO2 nanorods were obtained as an 1D structure. From this experiment, these nanorods would be used to construct the dye-sensitized solar cells (DSSCs) as photoelectrode. Current density –voltage (J-V) characteristics of DSSC with natural dye was measured. From J-V curve, conversion efficiency () and fill factor (FF) were evaluated for DSSC. 2018
85 Khin Thida Aung FARICATION OF TWO CELLS, THREE CELLS AND FOUR CELLS MEANDER TYPE DYE-SENSITIED SOLAR CELL MODULES Two cells, three cells and four cells meander type dye-sensitized solar cell modules have been fabricated by using natural dyes extracted from teak leaves as sensitizer. These solar cell modules were assembled with two 20-30 ohms conductive glasses (TEC 15, Dyesol) (one for TiO2 coated electrode and another for carbon coated electrode), TiO2 nanopowder (Degussa-P25 powder), iodide electrolyte solution and soft graphite pencil for carbon coating. The silver lines were drawn for series and meander connections. The silicone was drawn as a protective barrier on both sides of the silver line. The performance of all fabricated DSSC modules was evaluated by the open circuit voltage Voc, the short circuit current Isc and the fill factor (FF). The energy conversion efficiency ( ) was obtained under the air mass (AM) 1.5 radiation. 2018
86 Myint Myint Soe CHARACTERIATION OF NICKEL SODIUM SULPHATE HEXAHYDRATE (NSSH) CRYSTAL Crystals of Nickel Sodium Sulphate Hexahydrate, NiNa2(SO4)2.6H2O (abbreviated as NSSH) were grown by slow evaporation method at room temperature. Structural, vibrational and thermal properties of the crystal were investigated by XRD, FTIR and TG-DTA methods. XRD pattern shows that the NSSH crystal belongs to orthorhombic structure with the lattice parameters ? = 15.82 Å, = 9.34 Å and = 5.21 Å. FTIR spectrum showed that the vibrational characteristics of SO42- and H2O molecules in the crystalline environments of Ni and Na. TG-DTA thermograms indicated the high temperature phases of dehydration, decomposition and melting of the crystal. 2018
87 Aye Thandar STUDY ON PHYSICAL AND CHEMICAL CHARACTERIATION OF AMOO ASED IOCHAR This paper reports the results of physical and chemical characterization of bamboo based biochar. The bamboo was washed with fresh water to remove impurities such as dust. Bamboo was dried in room temperature. The bamboo ash was obtained in electric furnace at 1000 ?C for 3 h and 6 h respectively. Structural properties of bamboo ash were examined by X-ray diffraction (XRD). Scanning electron microscope (SEM) was used to observe the morphology of bamboo ash. Chemical characterization was carried out by X-ray fluorescence (EDXRF) and vibrational characterizations of bamboo ash was studied by FTIR spectroscopy. Each bamboo ash was used to form biochar ceramics by different amount of silica gel, PVA and DIW. These biochar ceramics were annealed at 200 C for 1 h to be binder burnt out. They were annealed at 600 C for 1 h to be more rigid. Physical properties such as firing shrinkage, bulk density, biochar yield, pH value of bamboo ash solution, moisture content, specific gravity and hydration capacity of Bio-char ceramics were determined. 2018
88 Thinzar Wut Yee STUDY ON ELECTRICAL PROPERTIES OF NICKELINC-COALT FERRITES HUMIDITY SENSORS Nickel-inc-Cobalt ferrites with the formula Ni0.97-xnx Co0.03 Fe2O4(where x = 0.25, 0.50 and 0.75) and pure NiFe2O4, CoFe2O4 and nFe2O4havebeen prepared by conventional ceramic technique. Starting materials of Analytical Reagent (AR) grade Nickel Oxide (NiO), inc Oxide (nO), Cobalt Oxide (Co3O4), and Iron Oxide (Fe2O3) with the desired stoichiometric compositions were used to synthesis the samples. Theas-prepared samples were made into circular shape pellets and their electrical properties were investigated in the relative humidity range of 40 RH% – 98RH%.The electrical resistance decreased with increase in relative humidity and the dc voltage and capacitance increased with increase in relative humidity. Sensitivity and sensitivity factor of the samples were examined for the application of humidity sensor. 2018
89 Hnin Hlwar Nu GAS SENSITIVITY OF NANOCRYSTALLINE COALT DOPED NICKEL FERRITES Gas sensing materials of Cobalt doped Nickel ferrites, Ni1-xCoxFe2O4 (x = 0.0, 0.1, 0.2 and 0.3) were prepared by self-combustion method. A quick combustion was taken as the calcination of metal hydroxides and the reaction between metal oxides. The obtained powders were pressed into disk shapes and subjected to thermal treatment at 1000C for 30 min. The X-ray diffraction (XRD) analysis was carried out to investigate the crystalline phase formation. Microstructural properties of the samples were investigated by Scanning Electron Microscopy (SEM). The grain size of the samples was found to be varied with the dopant concentration of Co. It was investigated the sensitivities of the samples from the gas-sensitive electrical resistance measurements in acetone, ethanol, octane and liquid petroleum gas (LPG) atmospheres. It was observed that the gas sensitivity depends on the concentration of Co dopant and the test gases to be detected. 2018
90 Khin Snadar Soe STRUCTURAL ANALYSES, MICROSTRUCTURAL CHARACTERISTICS AND ELECTRICAL CONDUCTIVITY OF COPPER-COALT FERRITES Solid electrolyte materials of Copper-Cobalt ferrites with the general formula, Cu1-xCoxFe2O4 (where x = 0.00, 0.33 and 1.00), were prepared by chemical co-precipitation method. Structural analyses of the samples were investigated by X-ray diffraction (XRD) method. XRD patterns revealed that the samples analogous to cubic structure and the lattice parameters were found to be increased with increase in concentration of Co. The crystallite sizes were obtained in the range of 29.85 nm – 43.44 nm. Scanning Electron Microscopy was used to study the microstructural properties of the sample. SEM micrographs showed that the grain shapes and sizes were affected by the concentration of Co and the most intergranular porosities were found in Cu-Co ferrite of x = 0.33 sample among the investigated materials. The electrical conductivities of the samples were investigated in the temperature range of 303 K – 873 K to study the superionic conductivities and to evaluate the activation energies of the samples for the applications of solid electrolyte materials. 2018