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Hideaki Narusawa

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Growth of Hydroxyapatite Huge Single Crystals by Hydrothermal decomposition of PolyPhosphate

water


Calcium Oxide


Ortho Phosphate

Prepare Polyphosphate





Put Orthophosphate into the chemical resistant Beaker, e.x PTFE, keep it 210degrees Celsius at least 2 weeks.





Hydrothermal Synthesis





PTFE High pressure reactor vessel, 25ml volume, put 0.5g of upper polyphosphate. add 0.6-0.7g Calcium oxide then mix them. add 12-14ml water, Tighten the vessel and put into electro Furness 200-240C. Keep it for 5-7days.





You can find mm size Hydroxyapatite crystals.

2 weeks or more for prepare polyphosphate.





1 week for Hydroxyapatite synthetization.

<a href="#figures" data-url="http://www.nature.com/protocolexchange/system/uploads/7073/original/10156292584_ed2f2af76d_o.jpg?1533881669">See figure in Figures section.</a> 


<a href="#figures" data-url="http://www.nature.com/protocolexchange/system/uploads/7075/original/apatite-diameter.jpg?1533881750">See figure in Figures section.</a> 


<a href="#figures" data-url="http://www.nature.com/protocolexchange/system/uploads/7077/original/AP-3day0011_x400_.jpg?1533881789">See figure in Figures section.</a>

1.Perloff, A., & POSNER, A. S. \(1956). Preparation of Pure Hydroxyapatite Crystals. Science \(New York, N.Y.), 124\(3222), 583–4.

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Using Polyphosphate, Calcium mixture and water, causes pure single apatite crystal by hydrothermal synthesis.

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Method Article

Hideaki Narusawa

Hideaki Narusawa

Hydroxy-apatite

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10.1038/protex.2018.111

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Hydroxyapatite monocrystal pure

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Hideaki Narusawa

Hideaki Narusawa

Hydroxy-apatite

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