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Journal of Materials Science and Nanotechnology | Volume 3

October 07-08, 2019 | Frankfurt, Germany

Materials Science and Engineering

International Conference on

Mater Sci Nanotechnol, Volume 3

Synthesis of hydroxyapatite from limestone by using precipitation method

Makmur Sirait, Ratna Sari Dewi Siregar, Karya Sinulingga

and

Nurdin Siregar

Universitas Negeri Medan, Indonesia

ydroxyapatite from limestone was synthesized by

precipitation method. During the synthesization the

temperature of a 200 mesh sample was increaced to 600oC

for 3 hours. The heatingmeans to transform CaCO3 into CaO.

Then the CaO was dissolved in aquades to get Ca(OH)2 ,

then disolved in H3PO4 0,3M as sorce of phosphate. The

solution was mixed using magnetic stirrer with speed of 300

rpm for 1 hours. Then NH4OH 1M are periodically drops so

that the solution becomes an alkaline with pH 10. Then the

solution was left for 24 hours and precipated was dried in

120oC for 5 hours. Hydroxyapatite powder obtained was

characterized by FTIR to see the major functional groups that

is formed in hydroxyapatite limestone. The results were 3

functional major groups that is phospate (PO43- ), carbonate

(CO32-) and hydroxyl (OH-) on hydroxyapatite limestone.

This shows that a good hydroxyapatite has been formed.

Speaker Biography

Makmur Sirait has completed his PhD at the age of 51 years from North

Sumatra University, Medan Indonesia. He is the head of physics program

study FMIPA Universitas Negeri Medan, Indonesia. He has over 70

publicationsthathavebeencitedover40times,andhispublicationH-index

is 3 and has been serving to Ministry of Research and Higher Education

of Indonesia for research funding support via DRPM funding scheme.