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Synthesis and sintered properties evaluation of calcium phosphate ceramics

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Title Synthesis and sintered properties evaluation of calcium phosphate ceramics
 
Creator PATTANAYAK, DEEPAK K
DASH, RAJALAXMI
PRASAD, RC
RAO, BT
 
Subject bioceramics
calcium compounds
fourier transform spectra
powder technology
stoichiometry
 
Description The present paper describes calcination of calcium phosphate ceramics (hydroxyapatite, HA) at 200, 400, 600, 800 and 1000 °C to observe the phase change using X-ray diffraction. HA phase was found to be stable up to 600 °C and later got dissociated into other non-stoichiometric phases like tricalcium phosphate (Ca3(PO4)2 [TCP]), calcium pyrophosphate (Ca2P2O7 [CPP]) and calcium hydrogen phosphate (CaHPO4 [CHP]). TCP was found to be the major phase above 1000 °C. FTIR spectra showed the presence of various PO43− and OH− groups present in the powder. Powders compacted and sintered at 900, 1000, 1100 and 1200 °C showed an increase in density from 2.11 to 2.95 g/cm3 while biaxial flexural strength (BFS) was found to be higher (48.7 MPa) when the samples were sintered at 1100 °C and it decreased with further increase in sintering temperature.
 
Publisher Elsevier
 
Date 2009-07-04T07:33:16Z
2011-11-25T15:06:33Z
2011-12-26T13:04:37Z
2011-12-27T05:50:37Z
2009-07-04T07:33:16Z
2011-11-25T15:06:33Z
2011-12-26T13:04:37Z
2011-12-27T05:50:37Z
2007
 
Type Article
 
Identifier Materials Science and Engineering: C 27(4), 684-690
0928-4931
http://dx.doi.org/10.1016/j.msec.2006.06.021
http://hdl.handle.net/10054/1595
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1595
 
Language en