Factors affecting crystallization of bioactive glasses

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Arstila H, Vedel E, Hupa L, Hupa M
Förläggare: ELSEVIER SCI LTD
Publiceringsår: 2007
Tidskrift: Journal of the European Ceramic Society
Tidskriftsakronym: J EUR CERAM SOC
Volym: 27
Nummer: 2-3
Artikelns första sida, sidnummer: 1543
Artikelns sista sida, sidnummer: 1546
Antal sidor: 4
ISSN: 0955-2219


Abstrakt

The product range of bioactive glasses is restricted by their tendency to crystallize at working processes typically performed with high viscosity melts. In this work high-temperature properties viscosity, devitrification temperature and liquidus temperature of seven bioactive glasses are measured. Further, the parameters used to describe glass stability and crystallization tendency are discussed. The results indicate that bioactive glasses can be divided into two groups: (1) glasses which nucleate and crystallize within the whole viscosity range of interest for forming processes, such as sintering and fiber drawing, and (2) glasses with a viscosity range enabling high temperature processing without crystallization. The main difference between these groups is the primary crystalline phase in crystallization. Glasses showing sodium-calcium-silicate crystallization are sensitive to high temperature processing, while glasses showing wollastonite crystallization have better stability at working temperatures. Thus, by adjusting the composition special products, such as fibers and porous implants can be manufactured.


Nyckelord

biomedical applications, fibres, glass, sintering

Senast uppdaterad 2019-13-11 vid 05:47