LOW TEMPERATURE HYDROTHERMAL SYNTHESIS OF CALCIUM PHOSPHATE CERAMICS: EFFECT OF EXCESS Ca PRECURSOR ON PHASE BEHAVIOR
| Main Authors: | Alqap, A.S.F. , I., Sopyan |
|---|---|
| Format: | Article PeerReviewed Book |
| Bahasa: | eng |
| Terbitan: |
CSIR
, 2009
|
| Subjects: | |
| Online Access: |
http://repository.unib.ac.id/9355/1/7-IJCA%2048A%2011%2C%20November%202009.pdf http://repository.unib.ac.id/9355/ |
Daftar Isi:
- Low temperature hydrothermal exchange reaction has been used to synthesize calcium phosphate materials comprising hydroxyapatite and $-tricalcium phosphate using CaO and NH4H2PO4 as calcium and phosphorus precursors, respectively. The effect of excess of calcium precursor on phase behavior of these materials has been investigated by varying CaO content in the suspension. Excess of CaO shifts the balance to hydroxyapatite formation at the higher calcination temperature such that ß-tricalcium phosphate, ß-tricalcium phosphate + hydroxyapatite and hydroxyapatite of higher purity are obtained with 0, 10 and 20 mole% excess CaO, respectively.