The effects of Cu2+ and La3+ doping on the sintering ability of sol-gel derived high silica bioglasses
authors Ben-Arfa, BAE; Salvado, IMM; Ferreira, JMF; Pullar, RC
nationality International
journal CERAMICS INTERNATIONAL
author keywords Sol-gel; Bioactive glass; Sintering; And density; Lanthanum; Copper
keywords DOPED BIOACTIVE GLASS; MECHANICAL-PROPERTIES; COPPER; OXIDE; CRYSTALLIZATION; DECOMPOSITION; SYSTEM; IONS
abstract This paper reports the hierarchical influence of co-doping copper and lanthanum in a sol-gel derived quaternary (Si, Ca, Na, P) bioactive glass on its sintering ability. The mutual effects of Cu & La on density, crystallisation and sinterability were investigated using Taguchi analysis. Thermal properties of bioglasses were assessed by DTA/TGA and dilatometry, while crystallisation phase evolution of was monitored by X-ray diffraction. Ten glass compositions were sintered at two temperatures (800 and 900 degrees C). The glass structure was analysed by MAS-NMR, the sintered density measured, and sintered microstructures observed by SEM/EDS. Results revealed that Cu promotes early densification, enhancing density at lower sintering temperatures. Oppositely, beneficial sintering effects of La might be observed at higher sintering temperatures (> 1000 degrees C). These differences are induced by the distinct roles of doping elements on devitrification upon increasing their concentrations: crystallisation is promoted by Cu and is inhibited by La.
publisher ELSEVIER SCI LTD
issn 0272-8842
isbn 1873-3956
year published 2019
volume 45
issue 8
beginning page 10269
ending page 10278
digital object identifier (doi) 10.1016/j.ceramint.2019.02.081
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000465058500074
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 3.83
5 year journal impact factor 3.513
category normalized journal impact factor percentile 94.643
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg