This page provides access to research works by Dr. Mohd Sobri Idris, currently a Senior Lecturer of School of Materials Engineering, Universiti Malaysia Perlis (UniMAP).

News

Skills and Expertise:Powder X-ray Diffraction,Lithium Ion Batteries,Advanced Ceramics Applied X-ray Crystallography,Solid Oxide Fuel Cells,Solid State Ionics and Materials For Energy.

Recent Submissions

  • A brief review of layered rock salt cathode materials for lithium ion batteries 

    Tan, Tze Qing; Soo, Soon Peng; Azmi, Rahmat, Prof.; Shamsul Baharin,  Jamaludin, Prof. Dr.; Rozana Aina, Maulat Osman, Dr. ; Zul Azhar, Zahid Jamal, Dato Prof. Dr.; Mohd Sobri, Idris, Dr. (Trans Tech Publications, 2013)
    Nowadays, many researchers have been studying on the layered rock salt-type structure as cathode materials for the lithium ion batteries. LiCoO2 is the most commonly used cathode material but Co is costly and toxic. Thus, ...
  • Studies on Bare and Mg-doped LiCoO2 as a cathode material for Lithium ion Batteries 

    Reddy, M. V.; Thor, Wei Jiea; Jafta, Charl Jeremy; Ozoemena, Kenneth Iyke; Mathe, Mkhulu Kenny; Nair, A. Sreekumaran; Soo, Soon Peng; Mohd Sobri, Idris, Dr.; Balakrishna, Geetha R.; Ezema, Fabian I.; Chowdari, B. V R (Elsevier Ltd., 2014-05)
    In this paper, we report on the preparation of bare and Mg-doped Li(Mg xCo1-x)O2 (x = 0, 0.03, 0.05) phases by a molten salt method and their electrochemical properties. They were prepared at 800 °C for 6 h in air. Rietveld ...
  • Ferroelectric and relaxor ferroelectric to paralectric transition based on Lead Magnesium Niobate (PMN) materials 

    Rozana Aina, Maulat Osman, Dr.; Mohd Sobri, Idris, Dr.; Zul Azhar, Zahid Jamal, Dato Prof. Dr.; Sanna, Taking, Dr.; Syarifah Norfaezah, Sabki, Dr.; Poopalan, Prabakaran, Dr.; Mohd Natashah, Norizan; Ili Salwani, Mohamad (Trans Tech Publications, 2013)
    First ferroelectric materials were found in Rochelle salt was in a perovskite structure. Lead Magnesium Niobate (PMN) is a perovskites with a formula of PbMg1/3Nb2/3O3 (PMN) and are typical representatives for most of all ...
  • Electrical properties of fresnoite Ba2TiSi2O8 using impedance spectroscopy 

    Rozana Aina, Maulat Osman, Dr. ; Mohd Sobri, Idris, Dr. (Trans Tech Publications, 2013)
    Fresnoite with composition Ba2TiSi2O8 (B2TS2) was first found in 1965, adopting a non-centrosymmetric structure. It also reported to crystallize in a tetragonal unit cell with a=8.52Å and c=5.210Å leading to some possible ...
  • Determination of interlayer mixing and oxygen non-stoichiometry in LiNi0.8Mn0.1Co0.1O2-δ using powder diffraction data 

    Mohd Sobri, Idris, Dr.; Rozana Aina, Maulat Osman, Dr.  (Trans Tech Publications, 2013)
    The effect of preparation conditions, temperature and atmosphere, on oxygen stoichiometry and interlayer cation mixing in the layered rock salt material LiNi0.8Mn0.1Co0.1O2-δ has been investigated using X-Ray powder ...
  • The existing of oxygen nonstoichiometry in complex lithium oxides 

    Mohd Sobri, Idris, Dr. (Trans Tech Publications, 2013)
    The possibility of oxygen deficiency in lithium-based complex oxides particularly for layered rock salt structures has little attention in the literature, in spite of the importance of these materials as potential lithium ...
  • Dielectric properties of barium titanate with different stoichiometry 

    Meor Ahmad Faris, Meor Ahmad Tajudin; Yeoh, Cheow Keat, Dr.; Mohd Sobri, Idris, Dr.; Teh, Pei Leng, Dr. (Trans Tech Publications, 2013)
    This paper focused in details about dielectric properties of BT with different stoichiometry. In this research, BT was synthesis by solid state reaction between TiO2 and BaCO3 at constant sintering temperature of 1350 °C. ...
  • A study of clinker microstructure using scanning electron microscope 

    Mohd Sobri, Idris; Shamsul Baharin, Jamaludin; Che Mohd Ruzaidi, Ghazali; Kamarudin, Hussin; Khairul Nizar, Ismail (Malaysian Institute for Nuclear Technology Research (MINT), 2006-11-29)
    This paper presents a study of clinker microstructure using Scanning Electron Microscope with Energy Dispersive Spectrometer (SEM-EDS). Use of SEM-EDS allows measuring bulk phase abundance and surface areas of the phases, ...
  • The Production of Lightweight Aggregates from Local Wastes 

    Khairul Nizar, Ismail, Dr.; Mohd Sobri, Idris; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Sabarudin, Mohd; Khairun Azizi, Mohd Azizli (International Exhibition of Inventions, 2007-04-18)
    The main aim of this reasearch was to produce lightweight aggregates which can be used as replacement for normal (natural) aggregates in structural concrete. Rice Husk Ash, Fly Ash and Quarry Dust was the main raw materials ...
  • The development of artificial marble from Dolomite (Batu Reput) in Perlis 

    Kamarudin, Hussin; Shamsul Baharin, Jamaludin; Che Mohd Ruzaidi, Ghazali; Mohd Sobri, Idris; Mohd Nazry, Salleh; Khairul Nizar, Ismail (Kolej Universiti Kejuruteraan Utara Malaysia, 2006-06-15)
    Perlis is one of the major producers of “Batu Reput” in Malaysia and majority of the deposits contain of high-purity calcium and magnesium carbonate. The composition of Batu Reput is similar with the ordinary dolomite. ...
  • The fabrication of artificial marble from dolomite (Batu Reput) 

    Kamarudin, Hussin; Shamsul Baharin, Jamaludin; Che Mohd Ruzaidi, Ghazali; Mohd Sobri, Idris; Mohd Nazry, Salleh; Mohabattul Zaman, S NS Bukhari; Khairul Nizar, Ismail (The Mineral, Metals & Materials Society (TMS), 2006-01)
    Perlis is one of the major producers of "Batu Reput" in Malaysia and majority of the deposits contain of high-purity calcium and magnesium carbonate. The composition of Batu Reput is similar with the ordinary dolomite. ...
  • Chemical & Mineralogical Properties of Fly Ash 

    Khairul Nizar, Ismail; Kamarudin, Hussin; Mohd Sobri, Idris (Malaysian Nuclear Society, 2007)
    Fly ash is the finely divided mineral residue resulting from the combustion of coal in electric generating plants. Fly ash consists of inorganic, incombustible matter present in the coal that has been fused during combustion ...
  • Comparative Characterization of Clinker’s Microstructure at Different Temperature Zone during Cement Production 

    Mohd Sobri, Idris; Khairul Nizar, Ismail; Shamsul Baharin, Jamaludin; Che Mohd Ruzaidi, Ghazali; Kamarudin, Hussin (Science Publications, 2007)
    Temperature is an important parameter for transformation of minerals in clinker during cement productions. It influences the formation of alite from belite during calcinations and clinkering processes. The result of ...
  • Physical & Chemical properties of Pulverised Fuel Ash 

    Khairul Nizar, Ismail, Dr.; Kamarudin, Hussin, Kol. Prof. Dato' Dr.; Mohd Sobri, Idris (Universiti Malaysia Perlis (UniMAP), 2007-06-09)
    Pulverised fuel ash is the finely divided mineral residue resulting from the combustion of coal in electric generating plants. Pulverised fuel ash consists of inorganic, incombustible matter present in the coal that has ...