Influence of Manganese Doping into HA Powders on the Properties of its Dense Bodies

Natasha A.N., and Sopyan I., and Mel, M., and Ramesh, S., (2008) Influence of Manganese Doping into HA Powders on the Properties of its Dense Bodies. Medical Journal of Malaysia, 63 (Supplement A). pp. 85-86. ISSN 0300-5283

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Affiliations

International Islamic University Malaysia. Dept. of Manufacturing and Materials Engineering.
International Islamic University Malaysia. Dept. of Manufacturing and Materials Engineering.
International Islamic University Malaysia. Dept. of Biotechnology Engineering.
Universiti Tenaga Nasional. College of Engineering. Dept. of Mechanical Engineering.

Abstract

The effect of Manganese (Mn) addition on the Vickers hardness and relative density of nanocrystalline hydroxyapatite (HA) dense bodies were studied. The starting Mn doped HA powders was synthesized via sol-gel method with Mn concentration varies from 2 mol% up to 15 mol% Mn. The Mn doped HA disc samples were prepared by uniaxial pressing at 200MPa and subsequently sintered at 1300°C. Characterization was carried out where appropriate to determine the phases present, bulk density, Vickers hardness of the various content of Mn doped HA dense bodies. The addition of Mn was observed to influence the color appearance of the powders and dense bodies as well. Higher Mn concentration resulted in dark grey powders. It was also found that the hardness and relative density of the material increased as the Mn content increased and influenced by the crystallinity of the prepared Mn doped HA powders.

Item Type:

Journal

Additional Information:

The influence of Mn doping into HA had been observed with its effect on the appearance, phases present, density and hardness of the samples when sintered at 1300°C. It was found that Mn doping has greatly influenced the appearance of the HA powders and dense samples as well, where the highest Mn doping gave the darkest shade of dense bodies. XRD analysis of the synthesized powders showing the appearance of β-TCP peak but the increased in Mn content has decreased the β-TCP peak. However, mere HA phase present in the sintered ceramic. Generally, increase in Mn content has increased both the relative density and the Vickers hardness of the samples. Despite of that, the hardness trend correlates well with the change in relative density where hardness increases steadily with relative density of the samples. The slight deviation observed for 2 mol% Mn doped HA ceramic where it gave highest value for both measurements above all. This could be attributed to the highest crystallinity of its prepared powders which influenced its dense samples properties.

Keywords:

Mangenese, Vickers hardness

Subjects:

R Medicine, Dentistry, Pharmacy, Nursing

ID Code:

7155