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Start Over Author "Hashim, Mansor" Publisher elsevier bv
27 results on '"Hashim, Mansor"'

2. Physicochemical properties of hydroxyapatite/montmorillonite nanocomposite prepared by powder sintering

Author

Nawang, Rosnah, Hussein, Mohd Zobir, Matori, Khamirul Amin, Che Abdullah, he Azurahanim, Hashim, Mansor, Nawang, Rosnah, Hussein, Mohd Zobir, Matori, Khamirul Amin, Che Abdullah, he Azurahanim, and Hashim, Mansor

Abstract

This study investigated the effect of the addition of montmorillonite into a hydroxyapatite nanocomposite for biomedical application. Hydroxyapatite (HA)/montmorillonite (MMT) nanocomposite was prepared using a powder sintering technique at 800 °C for 2 h. The specific surface area and pore volume were found to decrease linearly with the addition of MMT. The addition of 10–20% MMT led to a more homogeneous pore size distribution, which resulted in an increase in flexural strength by 18.9–17.1% and an increase in compressive strength by 107.9–63.1%. However, further addition of 30–60% MMT led to a less homogeneous pore size distribution, resulting in a decrease in flexural and compressive strength. The homogeneity of the pore size distribution was found to offer significant control over the strength of the nanocomposites. The addition of MMT resulted in the presence of an anhydrite phase, and this phase is useful to enhance the bioactivity of the nanocomposite. This study shows that the addition of MMT to HA for the formation of HA/MMT nanocomposite has a beneficial effect and has the potential to be used as a biomaterial, especially for non-load bearing sites in bone substitutions.

Published
2019

11. Comparative studies on the structure and electromagnetic properties of Ni-Zn ferrites prepared via co-precipitation and conventional ceramic processing routes

Author

Jahanbin, Tania, Hashim, Mansor, Mantori, Khamirul Amin, Jahanbin, Tania, Hashim, Mansor, and Mantori, Khamirul Amin

Abstract

The magnetic and physical properties of ferrites are very sensitive to microstructure, which in turn critically depends on the manufacturing process. In this study, nickel zinc ferrite powder with composition Ni0.8Zn0.2Fe2O4 has been prepared via conventional ceramic processing and co-precipitation methods. The toroidal and pellet form samples were sintered at various temperatures such as 1100, 1200 and 1300 °C. The microstructure, magnetic and dielectric properties of both samples were studied. The X-ray diffraction patterns confirm the formation of single-phase cubic spinel structure for the co-precipitation technique after sintering. The microstructure studies of Ni0.8Zn0.2Fe2O4 show the grain size increases and the porosity decreases with temperature for both methods. The controlled permeability with small loss and wide operational frequency range are found in the co-precipitation samples. Dielectric constants decrease with increase of frequency and increase with sintering temperature in both methods. Consequently, the homogenous microstructure with the low-loss high-performance of nickel zinc ferrite has been discovered by means of co-precipitation method.

Published
2010

12. Evolving microstructure, magnetic properties and phase transition in a mechanically alloyed Ni0.5Zn0.5Fe2O4 single sample

Author

Ismail, Ismayadi, primary, Hashim, Mansor, additional, Kanagesan, Samikannu, additional, Ibrahim, Idza Riati, additional, Nazlan, Rodziah, additional, Wan Ab Rahman, Wan Norailiana, additional, Abdullah, Nor Hapishah, additional, Mohd Idris, Fadzidah, additional, Bahmanrokh, Ghazaleh, additional, Shafie, Mohd Shamsul Ezzad, additional, and Manap, Masni, additional

Published
2014
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17. Crystallinity and magnetic properties dependence on sintering temperature and soaking time of mechanically alloyed nanometer-grain Ni0.5Zn0.5Fe2O4

Author

Ismail, Ismayadi, primary, Hashim, Mansor, additional, Ibrahim, Idza Riati, additional, Nazlan, Rodziah, additional, Mohd Idris, Fadzidah, additional, Shafie, Shamsul Ezzad, additional, Manap, Masni, additional, Bahmanrokh, Ghazaleh, additional, Abdullah, Nor Hapishah, additional, and Wan Rahman, Wan Norailiana, additional

Published
2013
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