Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies

In this work, nanosized hydroxyapatite (HA) powder was synthesized via mechanochemical method by a dry mixture of calcium hydroxide Ca(OH)2 and di-ammonium hydrogen phosphate (NH4)2HPO4 powders. The effect of mechanochemical process on powder properties was investigated. Three rotation speeds of 17...

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Main Authors:	Syed Abu Bakar, Sharifah Adzila, Sopyan, Iis, Abd Shukor , Mohamad Hamdi, Ramesh, Singh
Format:	Article
Language:	English
Published:	Trans Tech Publications 2011
Subjects:	T Technology (General)
Online Access:	http://irep.iium.edu.my/4600/ http://irep.iium.edu.my/4600/ http://irep.iium.edu.my/4600/ http://irep.iium.edu.my/4600/1/MSF.694.118.pdf

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spelling	iium-46002017-12-27T03:01:53Z http://irep.iium.edu.my/4600/ Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies Syed Abu Bakar, Sharifah Adzila Sopyan, Iis Abd Shukor , Mohamad Hamdi Ramesh, Singh T Technology (General) In this work, nanosized hydroxyapatite (HA) powder was synthesized via mechanochemical method by a dry mixture of calcium hydroxide Ca(OH)2 and di-ammonium hydrogen phosphate (NH4)2HPO4 powders. The effect of mechanochemical process on powder properties was investigated. Three rotation speeds of 170 rpm, 270 rpm and 370 rpm were chose with 15 hours milling time respectively. Characterization of nanopowders was accomplished by Fourier transform infra red (FTIR), X-ray diffraction (XRD) and nanosizer analysis. The green compacted powders with 200 MPa isostatically pressed were prepared and sintered in atmosphere condition at various temperatures ranging from 1150oC - 1350oC. The results showed that the rotation speed affected the obtained powders where the crystallite size was found increased with rotation speed (9 – 21 nm). In contrast, the particle size distribution decreased with rotation speed (322-192 nm). The sintering process has influenced the stability of powder by yielding TCP phase at a lower sintering temperature, 1150oC. However, powder synthesized at 370 rpm has showed a significant hardness, 5.3 GPa after compacted and sintered at 1250oC with the relative density of 95%. This phenomenon is believed to be related with the nanosize powder synthesized at high speed which has contributes the high strength of the sintered bodies. Trans Tech Publications 2011 Article PeerReviewed application/pdf en http://irep.iium.edu.my/4600/1/MSF.694.118.pdf Syed Abu Bakar, Sharifah Adzila and Sopyan, Iis and Abd Shukor , Mohamad Hamdi and Ramesh, Singh (2011) Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies. Materials Science Forum, 694. pp. 118-122. ISSN 0255-5476 http://www.scientific.net/MSF 10.4028/www.scientific.net/MSF.694.118
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T Technology (General)
spellingShingle	T Technology (General) Syed Abu Bakar, Sharifah Adzila Sopyan, Iis Abd Shukor , Mohamad Hamdi Ramesh, Singh Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies
description	In this work, nanosized hydroxyapatite (HA) powder was synthesized via mechanochemical method by a dry mixture of calcium hydroxide Ca(OH)2 and di-ammonium hydrogen phosphate (NH4)2HPO4 powders. The effect of mechanochemical process on powder properties was investigated. Three rotation speeds of 170 rpm, 270 rpm and 370 rpm were chose with 15 hours milling time respectively. Characterization of nanopowders was accomplished by Fourier transform infra red (FTIR), X-ray diffraction (XRD) and nanosizer analysis. The green compacted powders with 200 MPa isostatically pressed were prepared and sintered in atmosphere condition at various temperatures ranging from 1150oC - 1350oC. The results showed that the rotation speed affected the obtained powders where the crystallite size was found increased with rotation speed (9 – 21 nm). In contrast, the particle size distribution decreased with rotation speed (322-192 nm). The sintering process has influenced the stability of powder by yielding TCP phase at a lower sintering temperature, 1150oC. However, powder synthesized at 370 rpm has showed a significant hardness, 5.3 GPa after compacted and sintered at 1250oC with the relative density of 95%. This phenomenon is believed to be related with the nanosize powder synthesized at high speed which has contributes the high strength of the sintered bodies.
format	Article
author	Syed Abu Bakar, Sharifah Adzila Sopyan, Iis Abd Shukor , Mohamad Hamdi Ramesh, Singh
author_facet	Syed Abu Bakar, Sharifah Adzila Sopyan, Iis Abd Shukor , Mohamad Hamdi Ramesh, Singh
author_sort	Syed Abu Bakar, Sharifah Adzila
title	Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies
title_short	Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies
title_full	Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies
title_fullStr	Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies
title_full_unstemmed	Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies
title_sort	mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies
publisher	Trans Tech Publications
publishDate	2011
url	http://irep.iium.edu.my/4600/ http://irep.iium.edu.my/4600/ http://irep.iium.edu.my/4600/ http://irep.iium.edu.my/4600/1/MSF.694.118.pdf
first_indexed	2023-09-18T20:12:52Z
last_indexed	2023-09-18T20:12:52Z
_version_	1777407594724327424

Mechanochemical synthesis of nanosized hydroxyyapatite powder and its conversion to dense bodies

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