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Colloidal processing of hydroxyapatite
- Source :
- Biomaterials. 22:1847-1852
- Publication Year :
- 2001
- Publisher :
- Elsevier BV, 2001.
-
Abstract
- Reliable bioceramics are needed to implement the high requirements that living tissues demand. This work focuses on the processing steps necessary to manufacture advanced ceramics that can be used as implant devices. The influence of the heat treatment temperature on the characteristics of a precipitated hydroxyapatite (OHAp) powder was evaluated in order to obtain an appropriate specific surface area for colloidal processing. Ball milling of the calcined powders for 20 h was required to improve the rheological properties of the suspensions and the packing ability during consolidation. Different dispersing agents were tested and the first trial was made based on their effect on the zeta potential. The most promising ones were then selected and their efficiency was evaluated from rheological measurements and slip-casting performance of suspensions prepared at different solids loading. Targon 1128 was revealed to be the most efficient dispersant, enabling to prepare fluid suspensions containing 50 vol% solids and the highest green and sintered density values to be obtained.
- Subjects :
- Materials science
Biophysics
Mineralogy
Bioengineering
Dispersant
law.invention
Suspension (chemistry)
Biomaterials
Durapatite
Rheology
Chemical engineering
Mechanics of Materials
law
Specific surface area
visual_art
Ceramics and Composites
Zeta potential
visual_art.visual_art_medium
Calcination
Colloids
Ceramic
Powders
Ball mill
Subjects
Details
- ISSN :
- 01429612
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Biomaterials
- Accession number :
- edsair.doi.dedup.....e2f9062542679d27a6f1956e9880de92
- Full Text :
- https://doi.org/10.1016/s0142-9612(00)00366-5