Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Che Seman Mahmood"'
Publikováno v:
Advanced Materials Research. 545:269-274
A new perovskite based titano-manganite (La0.5-xPrxBa0.5)(Mn0.5Ti0.5)O3 at x concentration 0, 0.01, 0.03, 0.05, 0.07 and 0.09 has been successfully prepared by ceramic solid-state technique at sintering temperature of 1300 °C. Dielectric electrical
Publikováno v:
Materials Characterization. 62:373-377
This study investigates the effect of Al leaching during Fe removal from kaolin to mullite. Heat-treated kaolin was obtained by heating natural kaolin at 400, 500, 600, 700, 800 and 900 deg. C. The heat-treated kaolin was then leached at 100 deg. C w
Autor:
Che Seman Mahmood, Megat Harun Al Rashid Megat Ahmad, Sabrina Mohd Shapee, Rosidah Alias, Muhammad Redzuan Saad, Zulkifli Ambak, Zulfadli Mohamed Yusoff, Ibrahim Azmi
Publikováno v:
Key Engineering Materials. :285-288
An Al2O3-SiO2-PbO-MgO laminated tape system was prepared to investigate the dependence of some physical properties on various sintering temperatures, 840 °C, 880 °C, 920 °C and 960 °C. The results show that the effect of the increasing sintering
Autor:
Che Seman Mahmood, Nor Hayati Alias, A. Ikram, A. F. Awang Mat, M. H. Al Rashid Megat Ahmad, Rosidah Alias, E. G. Rachman Putra, Afifah Mohamed, A. Ibrahim
Publikováno v:
Advances in Applied Ceramics. 108:199-202
The effect of firing temperature on microstructure and dielectric properties of ceramic substrate was studied. The substrate which consists mostly of Al2O3 was fabricated using tape casting technique. Three ceramic substrate samples were fired at dif
Autor:
Che Seman Mahmood, Mohamed Razman Yahya, Sabrina Mohd Shapee, Abd. Fatah Awang Mat, Azmi Ibrahim, Rosidah Alias, Abdul Aziz Mohamed, Megat Harun Al Rashid Megat Ahmad
Publikováno v:
Materials Letters. 62:2339-2342
Nanostructured α-alumina powder was synthesized by precipitation and calcination of Al 13 -clusters that were formed by the hydrolysis of Al 3+ ions with hydroxide. The Al 13 -clusters were precipitated with oxalic acid by two-stage and one-stage pr
Autor:
Che Seman Mahmood, Rafhayudi Jamro, Razali Kasim, Azmi Ibrahim, Abdul Aziz Mohamed, Megat Harun Al Rashid Megat Ahmad, Muhammad Rawi Muhammad Zin, Edy Giri Rachman Putra
Publikováno v:
Journal of Physics and Chemistry of Solids. 68:2349-2352
Nanocrystalline alumina powder was produced from calcinations of Al13-oxalate precipitates at 1100 °C. A nearly normal distribution of agglomerated alumina powder was obtained with an average particle size of about 1 μm. XRD measurement confirmed t
Autor:
Siti Mariam Mohamad, Nurazila Mat Zali, Che Seman Mahmood, Choo Thye Foo, Julie Andrianny Murshidi
Publikováno v:
AIP Conference Proceedings.
Ferroelectric materials have found many applications in a wide range of capacitors, transducers, sensors, light valves and motors. Their properties are related to the routes they are processed. Ferroelectric materials in their bulk polycrystalline fo
Autor:
Che Seman Mahmood, Choo Thye Foo, Julie Adrianny Murshidi, Siti Mariam Mohamad, Nurazila Mat Zali
Publikováno v:
AIP Conference Proceedings.
In this study, BaTiO3 ceramics have been prepared via solid-state reaction method. The powders were calcined for 2 hours at different temperatures ranging from 600°C to 1200°C. Using X-ray diffraction with a Rietveld analysis, the phase formation a
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 161:11-16
A chemisorption technique has been developed for the quantitative determination of active centres in Re 2 O 7 –Al 2 O 3 metathesis catalysts. Butene-2 and ethylene were used as chemical probes to generate metal–carbene species on the active centr
Autor:
Che Seman Mahmood, Nurazila Mat Zali, Siti Mariam Mohamad, Choo Thye Foo, Julie Andrianny Murshidi
Publikováno v:
Journal of Materials Science and Engineering B. 3
Single phase lead titanate (PbTiO3) was prepared by solid-state route using lead (II) oxide (PbO) and titanium dioxide (TiO2) as precursors. The effects of using impact mill (IM) and ball mill (BM) in solid state reaction have been observed. X-ray di