Amalgamated Powder Essay

SYNTHESIS OF HYDROXYAPATITE NANOPARTICLES FOR BONE & TEETH REPLACEMENT APPLICATIONS

A.Leggins1,R.SreePadmini2,P.Hema3,B.Kokila3,P.Vijayapreetha3
1. Nanotechnology/Research Scholar, Sri Ramakrishna Engineering College, Coimbatore 22
2. Biomedical Engineering /Assistant Professor, Sri Ramakrishna Engineering College, Coimbatore 22.
3. Biomedical Engineering /Final year, Sri Ramakrishna Engineering College, Coimbatore 22. Abstract-Nano-Hydroxyapatite (HAp) has been syn-thesized via various methods like co-precipitation, sol-gel and solid-state reaction method. Ca/P ratio has been taken for HAp is 1.67. Amalgamated powder has cal¬cined at 750°C for the phase formation and to remove the volatile impurities.The ultimate powder has been characterized

Figure 2 (a), (b) and (c) Show the average particle sizes of HAp synthesized via co-precipitation, sol-gel and solid state reaction method respectively. The particle size found for solid state reaction method is 94.1 nm which very low comparing to the other two chemical methods. This could be the reaction at high temperature were leads to agglom-erations for the chemical methods, because of the chemical precursors reduced HAp powder tends to agglomeration. But comparing to these the solid state derived HAp is far better that has not got ag-glomerated.
3.2 UV ANALYSIS
The spectra of ultraviolet light for the three synthe-sized of HAp solutions are measured by UV spec-trometer and the results are shown in Fig.2. Fig 2: UV Spectrum for HAp synthesized by vari-ous methods (a) co-precipitation (b) solgel (c) solid state reaction methods.
The UV spectra result indicates that there is no absorption has found for HAp synthesized via co-precipitation and solgel derived. But the solid state reaction derived HAp ceramic absorption was found at near 575 nm. The result which indicates that the HAp synthesized via solid state reaction method could have better properties than the chemical derived nano HAp

The synthesized samples have been characterized with Particle size analyser, UV and XRD. The average particle size of HAp derived from solid state reaction method has smaller than other two methods. The solid state derived HAp particles has show good absorption at the range of 575 nm. And the XRD patterns reveal the clear phase formation for HAp synthesized via co-precipitation and solid state reaction method. Solgel shows some more intensity peaks from that we conclude that more calcinations temperature is needed to attain pure phase for HAp synthesized by solgel