Direct crystallization of silicate-phosphate glasses of $NaCaPO_{4}-SiO_{2}$ system
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej i Ceramiki (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Journal of Thermal Analysis and Calorimetry
ISSN
1388-6150
EISSN
1588-2926
Wydawca
Springer
Rok publikacji
2013
Numer zeszytu
3
Strony od-do
1363--1368
Numer tomu
113
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.42
Słowa kluczowe
EN
glass-crystalline materials
direct crystallization
silicate-phosphate glasses
Streszczenia
Język
EN
Treść
The subject of the study was silicate-phosphate glasses of NaCaPO 4-SiO2 system which are precursors of glass-crystalline materials. Glass-crystalline materials of NaCaPO4-SiO2 system obtained via crystallization of glasses belong to a group of the so-called bioactive materials. In order to obtain glass-crystalline materials with pre-established parameters, it is necessary to conduct crystallization of glasses at specific conditions. In order to design direct crystallization process properly, it is necessary to know the structure and microstructure of the glassy precursor. Microscopic investigation showed that liquation takes place in all the studied glasses. Based on DSC examinations, it has been found out that crystallization of the glasses of NaCaPO4-SiO2 system is a multistep process. The presence of several clearly separated exothermic peaks in DSC curves of investigated glasses makes it possible to crystallize only the separated phase with the matrix remaining amorphous or vice versa. Conducted detailed X-ray and spectroscopic studies of the materials obtained by heating in a gradient furnace (in the temperature specified on the basis of DSC) showed that separated phase and matrix crystallizes separately. Therefore, bioactive glass-crystalline materials can be obtained due to the existence of the phase separation phenomenon and pre-established sizes of the crystalline phase. © 2013 The Author(s).
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:079990
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