Banjuraizah Johar, Dr.: Recent submissions
Now showing items 1-20 of 24
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Microstructure, Crystal structure and ionic conductivity of 3 mol % (Fe, Mn, Co, Zn) doped 8YSZ
(EDP Sciences, 2016)Effect of 3 mol% of transition elements doped 8YSZ such as YSZZn, YSZFe, YSZCo and YSZMn on the ionic conductivity. SOFCs mostly operate at higher temperature. By substitute with dopants, it can reduce the operating ... -
Synthesis and Characterization of Stabilized Zirconia Toughened Alumina (ZTA) Doped Niobium Pentoxide (Nb2O5)
(EDP Sciences, 2016)The main target of this research is to study the mechanical properties of the Nb2O5 doped with alumina-zirconia composites. Pellets form samples of ZTA (5YSZ) doped niobium pentoxide in varied amount of 0 wt%, 0.3 wt%, 0.5 ... -
Influence of Sintering Temperature on Crystallization Behavior of Cordierite synthesized from Non-Stoichiometric Formulation
(EDP Sciences, 2016)Cordierite body with formulation of non-stoichiometric composition (2.5 MgO. 1.8 Al2O3. 5 SiO2) was synthesized using conventional techniques with standard raw materials. The sintering and crystallization behavior of the ... -
The effect of ZnO addition on the phase transformation, microstructure, and ionic conductivity of 8YSZ ceramics
(EDP Sciences, 2016)In this paper the effect of zinc oxide (ZnO) addition on the phase transformation and ionic conductivity of 8 mol % Yttria-stabilised Zirconia (8YSZ) is investigated. Pure 8YSZ and ZnO doped YSZ ceramics are prepared using ... -
Fe-doped 8YSZ at different composition for solid electrolyte in solid oxide fuel cell
(EDP Sciences, 2016)Pure 8 mol% yttria stabilized zirconia (YSZ) and Fe-doped (1 mol%, 2 mol% and 3 mol%) YSZ electrolyte were prepared and sintered at 1550°C. Transition metal oxide is added into YSZ as sintering aided has a function to ... -
Synthesis and characterization of xMgO-1.5Al2O3-5SiO2 (x = 2.6-3.0) system using mainly talc and kaolin through the glass route
(Elsevier B.V., 2011-10-03)Three non-stoichiometric cordierite with compositions of xMgO-1.5Al2O3-5SiO2 (x = 2.6-3.0 mol) were synthesized using mainly talc and kaolin through the glass route. The densification and crystallization behaviors of these ... -
Effect of impurities content from minerals on phase transformation, densification and crystallization of α-cordierite glass-ceramic
(Elsevier B.V., 2011-07-14)α-Cordierite glass-ceramic was produced through crystallization of glass compacts made of milled glass frits. A comparative investigation between two different initial raw materials to synthesize α-cordierite glass-ceramic ... -
Effect of excess mgo mole ratio in a stoichiometric cordierite (2MgO·2Al2O3·5SiO 2) composition on the phase transformation and crystallization behavior of magnesium aluminum silicate phases
(The American Ceramic Society, 2011-05)The effect of excess MgO, 2.0-4.0 mol ratios on the crystallization behavior and purity of Iμ-cordierite was investigated using X-ray diffraction (XRD), differential thermal analyzer, and TGA. Quantitative XRD, the Rietveld ... -
Effect of excess mgo mole ratio in a stoichiometric cordierite (2MgO·2Al2O3·5SiO 2) composition on the phase transformation and crystallization behavior of magnesium aluminum silicate phases
(The American Ceramic Society, 2011-05)The effect of excess MgO, 2.0-4.0 mol ratios on the crystallization behavior and purity of Iμ-cordierite was investigated using X-ray diffraction (XRD), differential thermal analyzer, and TGA. Quantitative XRD, the Rietveld ... -
Densification and crystallization of nonstoichiometric cordierite glass with excess MgO synthesized from kaolin and talc
(The American Ceramic Society, 2011-03)Densification and crystallization behaviors of nonstoichiometric cordierite synthesized from minerals through the glass route are reported in this paper. DTA of glass powder was conducted under isothermal and nonisothermal ... -
Rietveld quantitative phase analysis of non-stoichiometric cordierite synthesised from mainly talc and kaolin: Effect of sintering temperature
(Trans Tech Publications, Switzerland., 2011)Indialite or α-cordierite was synthesized by glass crystallization method using mainly talc and kaolin and with small amount of MgO, Al 2O3, SiO2 to compensate the chemical formulation of non-stoihiometric compositions of ... -
Characterization and phase evolution of cordierite based glass synthesis from pure oxide and minerals
(Trans Tech Publications, Switzerland, 2011)α Cordierite is very important phase in MgO-Al2O 3-SiO2 system because of their very outstanding thermal, chemical and electrical properties. In this presents study non-stoichiometry cordierite (MgO:Al2O3:SiO2 = 3:1.5:5) ... -
Effect of melting temperatures on the crystallization and densification of 2.8MgO•1.5Al2O3•5SiO2 glass-ceramic synthesized from mainly talc and kaolin
(Elsevier B. V., 2010-02-03)Single phase α-cordierite with low sintering temperature was produced from 2.8MgO·1.5Al2O3·5SiO2 chemical formulation using mainly talc and kaolin. The effect of melting temperature to the densification, crystallization ... -
Characterization of limestone and dolomite using x-ray fluorescent (XRF) for cement processing
(Mineral Research Centre, 2009-11-09)Dolomite and limestone is considered under a sedimentary carbonated rocks. It contains almost same compound but major difference is on the amount of MgO and CaO which prove with XRF testing. MgO for dolomite shows 23% and ... -
Characterization of BET, XRF and weight loss on dolomite and calcined dolomite heated at different heating time
(Universiti Sains Malaysia (USM)School of Materials & Mineral Resources Engineering (SMMRE), 2009-06-01)Dolomite consist carbonate of calcium and magnesium (CaC03 and MgCO^). It is formed [CaMg (CO^J from chemical action of sea-water containing high magnesium on limestone. The purpose of this study is to characterize dolomite ... -
Thermal expansion coefficient and dielectric properties of non-stoichiometric cordierite compositions with excess MgO mole ratio synthesized from mainly kaolin and talc by the glass crystallization method
(Elsevier B. V., 2010-04-02)α-Cordierite phase in non-stoichiometric cordierite formulations was synthesized using mainly kaolin and talc, without sintering aids, via the glass crystallization route. MgO mole ratios in the formulations were varied ... -
Fabrication and properties of Aluminium reinforced calcined dolomite and ferrosilicon by powder metallurgy route
(Universiti Malaysia PerlisSchool of Materials Engineering, 2007) -
Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
(Elsevier B.V., 2009-08)Cordierite body with the formulation of 2.8MgO·1.5Al2O3·5SiO2 was prepared from talc and kaolin as the basic raw materials. Following glass crystallization technique the glass powder was successfully heat treated at 900 ... -
Morphology studies of treated and untreated Silicon carbide filled Polypropylene composites
(Universiti Malaysia Perlis, 2007-05-15)Silicon carbide filled Polypropylene (PP) composites are fabricated, where the compounding is carried out by using Z-blade mixer with filler loadings of Owt%, 10wt%, 20wt% and 30wt%. In order to improve compatibility between ... -
Effect of sintering environment to the physical properties of Al/calcined dolomite composite
(Universiti Malaysia Perlis (UniMAP), 2007-06-09)Composites of pure aluminum with calcined dolomite powders of <65□m in size were prepared by mechanical milling. Fabrication involves the mixing of reinforcement particles with the metallic powder followed by consolidation ...