Synthesis and Characterization of Calcium Phosphate-Alumina Composites

Panda, Ashish Kumar (2012) Synthesis and Characterization of Calcium Phosphate-Alumina Composites. BTech thesis.



In the present study synthetic α-alumina and calcium phosphate based composites were processed and their mechanical properties were characterized. α-Alumina nano-powder was synthesized using reverse micelle method. Calcium phosphate nano-powders with different molar ratio starting from 1.8 to 1.1 was synthesized by precipitation method, using calcium nitrate (Ca(NO3)2.4H2O) and ammonium dihydrogen orthophosphate (NH4H2PO4) as precursor materials as source for calcium (Ca²+) and phosphate ((PO4)3-) ions respectively. Then 5, 10, 20 weight % of Calcium phosphate powder was mixed with alumina, consolidated and sintered at 1400°C for 4 hours. The synthesized composites, in form of pellets were characterized for bulk density, apparent porosity, hardness and flexural strength and its grain size and morphology were studied from SEM micrographs of sintered pellets.
The synthesized composites were found to have a bulk density in the range 3.092 – 3.76 g/cc, apparent porosity in the range 11-20% and hardness in the range 193.3 - 335 HV.

Item Type:Thesis (BTech)
Uncontrolled Keywords:calcium phosphate, precipitation method, α-Alumina, reverse micelle method, sintered, characterized
Subjects:Engineering and Technology > Ceramic Engnieering
Divisions: Engineering and Technology > Department of Ceramic Engineering
ID Code:3431
Deposited By:Mr. Ashish Kumar Panda
Deposited On:22 May 2012 15:37
Last Modified:22 May 2012 15:37
Supervisor(s):Dasgupta, S

Repository Staff Only: item control page