Porous hydroxyapatite ceramics prepared by dry powder pressing with sucrose and by suspension foaming techniques using wheat flour and other pore formers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F14%3A43898212" target="_blank" >RIV/60461373:22310/14:43898212 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Porous hydroxyapatite ceramics prepared by dry powder pressing with sucrose and by suspension foaming techniques using wheat flour and other pore formers

Popis výsledku v původním jazyce

Porous hydroxyapatite (HA) ceramics with controlled microstructure have been prepared by uniaxial pressing of dry HA powders with a precisely size fraction of sucrose (400-600 ?m) as a pore former and pressing additive. Total porosities obtained after firing (800-1000 °C) powder compacts with 10-50 vol.% of sucrose are in the range 52-72 %, which indicates that a significant part of the porosity is not a result from sucrose burnout, but residual interstitial porosity between the primary nanocrystallineHA grains (crystallites) forming the matrix in which the large pores (mean chord length range determined via stereology-based image analysis approx. 400-800 ?m) are embedded. This has been confirmed by SEM and by mercury porosimetry. As expected, the strength of these materials is not very high (diametral compression strength { 1.2 MPa) and decreases significantly with increasing porosity. However, Young's moduli are in the range 1-11 GPa, i.e. very close to that of bone (2-20 GPa), so t

Název v anglickém jazyce

Porous hydroxyapatite ceramics prepared by dry powder pressing with sucrose and by suspension foaming techniques using wheat flour and other pore formers

Popis výsledku anglicky

Porous hydroxyapatite (HA) ceramics with controlled microstructure have been prepared by uniaxial pressing of dry HA powders with a precisely size fraction of sucrose (400-600 ?m) as a pore former and pressing additive. Total porosities obtained after firing (800-1000 °C) powder compacts with 10-50 vol.% of sucrose are in the range 52-72 %, which indicates that a significant part of the porosity is not a result from sucrose burnout, but residual interstitial porosity between the primary nanocrystallineHA grains (crystallites) forming the matrix in which the large pores (mean chord length range determined via stereology-based image analysis approx. 400-800 ?m) are embedded. This has been confirmed by SEM and by mercury porosimetry. As expected, the strength of these materials is not very high (diametral compression strength { 1.2 MPa) and decreases significantly with increasing porosity. However, Young's moduli are in the range 1-11 GPa, i.e. very close to that of bone (2-20 GPa), so t

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F12%2F1170" target="_blank" >GAP108/12/1170: Porézní keramika s řízenou elasticitou a tepelnou vodivostí</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 10th International Conference on Polysaccharides - Glycoscience

ISBN

978-80-86238-70-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

182-187

Název nakladatele

Česká chemická společnost

Místo vydání

Praha

Místo konání akce

Prague, Czech Republic

Datum konání akce

22. 10. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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