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Sol–gel synthesis and characterization of macroporous calcium phosphate bioceramics containing microporosity

Paper ID Volume ID Publish Year Pages File Format Full-Text
2614 118 2009 8 PDF Available
Title
Sol–gel synthesis and characterization of macroporous calcium phosphate bioceramics containing microporosity
Abstract

Amorphous calcium phosphate powders were precipitated from calcium metal and phosphoric acid in ethanol. Depending on the quantity of reagent, the CaP powders had different chemical compositions and, after heating, formed beta-tricalcium phosphate (β-TCP), hydroxyapatite (HA) or BCP mixtures. Dilatometric measurements indicated that shrinkage of compacted CaP powders occurred first at around 650 °C and continued up to 1200 °C. The amorphous CaP powders were mixed with urea beads, compacted under isostatic pressure at 140 MPa and sintered at 1100 °C for 5 h. Scanning electron microscopy indicated that macro–microporous ceramics were produced. The ceramics had spherical macropores of 700–1200 μm in diameter, with limited interconnections and a macroporosity of 42% as determined by microcomputed tomography. The micropores ranged from 0.1 to 1 μm in diameter. These ceramics made of HA, β-TCP or BCP exhibiting both macroporosity and microporosity can be used as bone fillers.

Keywords
Calcium phosphate; Sol–gel processing; Amorphous powders; Sintering; Ceramics
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Sol–gel synthesis and characterization of macroporous calcium phosphate bioceramics containing microporosity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 5, Issue 2, February 2009, Pages 735–742
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us