Browsing Center of Excellence for Geopolymer and Green Technology (CEGEOGTECH) (Articles) by Issue Date
Now showing items 1-20 of 135
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Disorder dependent half-metallicity in Mn2CoSi inverse Heusler alloy
(Elsevier Ltd., 2013)Heusler alloys based thin-films often exhibit a degree of atomic disorder which leads to the lowering of spin polarization in spintronic devices. We present ab-initio calculations of atomic disorder effects on spin ... -
Electronic structure, magnetism and robust half-metallicity of new quaternary Heusler alloy FeCrMnSb
(Elsevier B.V., 2013)A new quaternary Heusler alloy FeCrMnSb is identified by employing ab initio electronic structure calculations. It is stable in Y-structure which is also verified by various conditions governed by elastic constants c ij. ... -
External temperature and pressure effects on thermodynamic properties and mechanical stability of yttrium chalcogenides YX(X=S, Se and Te)
(Elsevier B.V., 2013)The full potential linearized augmented plane wave method within the framework of density functional theory is employed to investigate the structural, thermodynamic and elastic properties of the yttrium chalcogenides (YX: ... -
First principle calculations of transition metal oxide, AgAlO2, as active photocatalyst: sustainable alternative sources of energy
(Electrochemical Science Group (ESG), 2013)Electronic structure, optical properties and electronic charge density of transition metal oxide, AgAlO2 as active photocatalyst are calculated using full potential linearize augmented plane wave (FP-LAPW) method within ... -
Electroless Ni-P-Cg(Graphite)-SiC composite coating on cast AlSi alloy
(Trans Tech Publications, 2013)The study presents the electroless N-P-Cg-SiC composite coating on cast AlSi (ADC12) alloy where the bath temperature is maintained at 90°C, pH level is controlled between 4.5 to 5.0 and stirred at 450 rpm with mechanical ... -
Effect of fly ash/alkaline activator ratio and sodium silicate/NaoH ratio on fly ash geopolymer coating strength
(Trans Tech Publications, 2013)Fly ash geopolymer coating material potential used to protect surface used in exposure conditions. Ratio of fly ash/alkaline activator and Na₂SiO₃/NaOH play important parameter on determining the best flexural strength of ... -
Application of clay - based geopolymer in brick production: A review
(Trans Tech Publications Inc., 2013)This paper reviews and summarizes the current knowledge and application of clay as a geopolymer material in production of geopolymer brick. As we understand, the nature of source materials give a significant impact to the ... -
First principle study of electronic structure, chemical bonding and optical properties of 5-azido-1H-tetrazole
(Electrochemical Science Group (ESG), 2013)First principle calculations were performed to investigate the electronic band structure, density of states, charge density and optical properties of 5-azido-1H-tetrazole. The calculated band structure shows that the ... -
Thermal management of electronic components by using computational fluid dynamic (CFD) software, fluent™ in several material applications (epoxy, composite material & nano-silver)
(Trans Tech Publications, 2013)This paper presents the thermal management of electronic components, microprocessor by using three dimensional numerical analysis of heat and fluid flow in computer. 3D model of microprocessors is built using GAMBIT and ... -
Alkali activated blast-furnace slag cement: The opportunity to solve sustainable issues
(American-Eurasian Network for Scientific Information, 2013)This paper aimed at investigating the possibility of alkali activated blast-furnace slag (BFS) to produce cement powder that could be alternative to ordinary Portland cement. It was found that an alkali activated BFS ... -
A new invention of thermal pad using sol-gel nano-silver doped silica film in plastic leaded chip carrier (PLCC) application by using computational fluid dynamic sofrware, CFD analysis
(Trans Tech Publications, 2013)Thermal pad is new technology in the world that been used in PLCC in order to reduce junction temperature to the minimum level in electronic components. Thermal Pad was made by using nano-silver as main material. Nano-silver ... -
The comparison between four PLCC packages and eight PLCC packages in personal computer (PC) using computational fluid dynamic (CFD), fluent software™ using epoxy moulding compound material (EMC)
(Trans Tech Publications, 2013)The paper present the three dimensional numerical analysis of heat and fluid flow through Plastic Leaded Chip Carrier (PLCC) packages in inline orientation horizontally mounted on a printed circuit board in a wind tunnel ... -
Numerical investigation of heat transfer of twelve Plastic Leaded Chip Carrier (PLCC) by using computational fluid dynamic, FLUENT™ software
(Trans Tech Publications, 2013)Plastic Leaded Chip Carrier (PLCC) package has been emerged a promising option to tackle the thermal management issue of micro-electronic devices. In the present study, three dimensional numerical analysis of heat and fluid ... -
Batu Reput filled recycled polypropylene eco-polymer composites
(American-Eurasian Network for Scientific Information, 2013)The effect of Batu Reput, which scientifically called as Dolomite mineral filler on the mechanical properties of recycled polypropylene (rPP) mixed using Z-blade mixer was examined. This research has been done to investigate ... -
Strength of the weld line and warpage defects on the molded parts in injection molding process
(Praise Worthy Prize S.r.l., 2013)Strength at weld the line location and warpage problem in injection molding plastic component were not new problems in injection molding industries. Many researchers had emerged with several improvement techniques to reduce ... -
Photovoltaic characteristics of hybrid MEH-PPV-nanoparticles compound
(Elsevier B.V., 2013)Organic solar cell research has vastly developed in recent years. These organic solar cells however are still limited to low power conversion efficiencies. This has led to the generation of photovoltaic cells based on ... -
The effect of different sizes "Batu Reput" (Dolomite) as a filler in SMR L and ENR-50
(Trans Tech Publications, 2013)The effects of different sizes of "Batu Reput" (Dolomite) filler which are smaller size (<63μm) and bigger size (75-150μm) on tensile and morphological properties of "Batu Reput" (Dolomite) filled SMR L and epoxidized ... -
Effect of heat treatment on Ni-P-Cg(Graphite)-SiC composite coated cast AlSi alloy
(Trans Tech Publications, 2013)The study presents the effect of heat treatment on electroless N-P-Cg-SiC composite coated cast AlSi (ADC12) alloy. No significant changes are noted on the average surface roughness and surface morphology of the coating ... -
Microstructure studies on the effect of the alkaline activators of fly ash-based geopolymer at elevated heat treatment temperature
(Trans Tech Publications, 2013)Fly ash-based geopolymers are new binding materials produced to replace the ordinary Portland cement (OPC) used in concrete. In this research, the effect of alkaline activators on the compressive strength and the microstructure ... -
Malaysian Foxtail grass - A potential source of natural/agro fibre for polymer composite panel
(Trans Tech Publications, 2013)Foxtail grass, also known as 'rumput bulu' by the local people, is one of the fast growing grasses abundantly available all over Malaysia. A full grown Foxtail grass attains a height of about 0.5 - 1.5 meters. The fibres ...