Zul Azhar Zahid Jamal
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Preferred name
Zul Azhar Zahid Jamal
Official Name
Zul Azhar, Zahid Jamal
Alternative Name
Jamal, Z. A. Z.
Jamal, Zul Azhar Zahid
Jamal, Z. A. Zahid
Jamal, ZA
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Scopus Author ID
18935174100
Researcher ID
FCT-5153-2022

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  • Publication
    Mineralogical characterizations of Langkawi ilmenite ore for carbothermal reduction
    ( 2022-01-01)
    Mohammed A.I.
    ;
    Nur Farhana Diyana Mohd Yunos
    ;
    Muhammad Asri Idris
    ;
    Zul Azhar Zahid Jamal
    ;
    Nur Farhana Hayazi
    ;
    Nomura T.
    The mineralogical characterizations of Langkawi’s ilmenite were investigated using XRD, XRF and SEM/EDS for morphological analysis. The minerals mainly consisted the phases of FeTiO3, Fe3O4 and TiO2 and Rietveld refinement indicated that the ore contained 35.85% of TiO2 and 26.52% of Fe3O4. The amount of the elements calculated form the quantitative and XRF analysis are reliable and in acceptable ranges. The morphology of the ore showed that the ore is formed mainly in sub-rounded grains with titanium and iron as main elements. The ore was categorized as a low-grade ore, but it can be upgraded for TiO2 production using carbothermal reduction reactions, where the results of XRD, XRF, SEM showed extractable amount of TiO2 more than 32wt%.
      1
  • Publication
    Phase transformations of Langkawi ilmenite ore during carbothermal reduction using palm char as renewable reductant
    ( 2022-02-01)
    Mohammed A.I.
    ;
    Nur Farhana Diyana Mohd Yunos
    ;
    Muhammad Asri Idris
    ;
    Nur Hazira Najmi
    ;
    Zul Azhar Zahid Jamal
    ;
    Nomura, Takahiro
    The phase transformations of carbothermal reduction of Langkawi ilmenite ore by palm char were studied in reduction temperatures ranging from 1200 °C, 1300 °C, and 1400 °C using a horizontal tube furnace with inert argon gas. The palm shells as renewable carbon reductant for carbothermal reduction of ilmenite ore were converted into palm char using pyrolysis techniques to improve and increase the surface area and carbon content. The present study aims to reduce oxides in ilmenite ore from our local mining to produce titanium oxides by carbothermal reduction process and recycled agricultural waste from palm shell as renewable reductant. The phase and chemical compositions of ilmenite ore and reduced samples were analyzed by XRD and XRF. It was found that ilmenite ore mainly contained titanomagnetite, hematite, and titanium dioxide phases. After carbothermal reduction, the titanomagnetite phase from ilmenite ore was transformed into titanium dioxide, iron titania, iron, and titanium carbide at the highest reduction temperature (1400 °C) via XRD analysis. The phase transformation revealed the porous structure with wider pore size distribution and high carbon from palm char was able to reduce the oxides in ilmenite ore. According to XRF analysis, the TiO2 amount was increased with the temperature; from 25.7 wt.% at 1200 °C up to 50.8 wt.% with the extent of reduction of TiO2 was 78.56% at 1400 °C. The carbothermal reduction of ilmenite ore using palm char as a renewable reductant was possible and promising in mineral ore extractions.
      6  10
  • Publication
    Mineralogical characterizations of Langkawi Ilmenite ore for carbothermal reduction
    (Universiti Malaysia Perlis (UniMAP), 2022-01)
    A. I. Mohammed
    ;
    Nur Farhana Diyana Mohd Yunos
    ;
    Muhammad Asri Idris
    ;
    Zul Azhar Zahid Jamal
    ;
    Nur Farhana Hayazi
    ;
    T. Nomura
    The mineralogical characterizations of Langkawi’s ilmenite were investigated using XRD, XRF and SEM/EDS for morphological analysis. The minerals mainly consist of the phases of FeTiO3, Fe3O4 and TiO2 by Rietveld refinement, which indicated that the ore contains 35.85% of TiO2 and 26.52% of Fe3O4. The amount of the elements calculated from the quantitative and XRF analysis are reliable and in acceptable ranges. The morphology of the ore shows that the ore is formed mainly in sub-rounded grains with titanium and iron as the main elements. The ore is categorized as a low-grade ore, but it can be upgraded for TiO2 production using carbothermal reduction reactions, where the results of XRD, XRF, SEM showed an extractable amount of TiO2 more than 32wt%.
  • Publication
    Physical, electrical and optical characterizations of Ba0.5Sr0.5TiO3 (BST) thin films
    ( 2020-01-08)
    Bakar Nurhanani Abu
    ;
    Adnan Johari
    ;
    Rozana Aina Maulat Osman
    ;
    Zul Azhar Zahid Jamal
    ;
    Muhammad Asri Idris
    ;
    Wan Mohd Faizal Wan Nik
    ;
    Man Bahari
    Single layer Barium Strontium Titanate (BaxSr1-xTiO3) thin films were deposited on P type Silicon (Si) and thin Silicon Dioxide (SiO2) layer grown on Silicon (Si) substrate (1.5 cm x 1.5 cm) using spin coating technique were investigated in this work. The thin films were crystallized by annealing at 950 °C for 4 hours. Physical characterization was performed using XRD. Electrical and optical characterizations were aided by depositing Aluminum (Al) using Physical Vapor Deposition (PVD) on the thin films as electrode metal. I-V profile was obtained using Semiconductor Parametric Analyzer (SPA). A high impedance multimeter, light meter and a variable light source were introduced for optical characterizations including optical sensitivity, current density and I-V profile under variable light intensity from 0 to 900 Lux. Results show BST has diode like characteristics. The results which were compared with those from commercial solar cells and light sensors indicated that the BST thin films have potential as solar power generator and sensor.
      1