Synthesis of hydroxyapatite through dry mechanomical method and its conversion to dense bodies: preliminary result

Iis, Sopyan (2011) Synthesis of hydroxyapatite through dry mechanomical method and its conversion to dense bodies: preliminary result. IFMBE proceedings, 35. pp. 97-101. ISSN 16800737

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Abstract

Hydroxyapatite (HA) powder has been prepared through mechanochemical synthesis from a dry powder mixture of calcium hydroxide Ca(OH)2 and di-ammonium hydrogen phosphate (NH4)2HPO4. Three different rotation speeds of 170 rpm (M1), 270 rpm (M2) and 370 rpm (M3) were used in this method. The as synthesized powder analyzed by FTIR and XRD confirmed the formation of HA structure with nano crystallite size in all milling speeds. XRD results showed the wide broad peaks of HA powders narrowed and crystallinity increased (31.0-42.5%) when the milling speed was accelerated to 370 rpm. The powders were compacted using cold isostatic pressing at 200 MPa and then subjected to 1150oC, 1250oC and 1350oC sintering. The sintered compacts were mechanically tested by Vickers microhardness indentation method. Powder synthesized at 370 rpm was found to have a significant hardness, 5.3 GPa obtained after 1250oC sintering.

Item Type:	Article (Journal)
Additional Information:	4809/21856
Uncontrolled Keywords:	synthesis, hydroxyapatite, mechanomical
Subjects:	T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	PROF. DR. IIS SOPYAN
Date Deposited:	06 Mar 2012 12:42
Last Modified:	06 Mar 2012 22:15
URI:	http://irep.iium.edu.my/id/eprint/21856

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