In situ thermal and structural characterization of bioactive clacium phosphate glass ceramics containing TiO2 and MgO oxides: High temperature - XRD studies

A. G. Dias, Janet Mabel Scott Skakle, Iain Ronald Gibson, M. A. Lopes, J. D. Santos

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Abstract

This study aims to develop glass ceramics in the calcium phosphate system that exhibit suitable properties to be used for biomedical applications. Calcium phosphate glasses with the incorporation of small additions of MgO and TiO2 oxides were prepared in the pyro-and orthophosphate regions. The glass ceramics were prepared by a controlled powder sintering process through heat-treatment at different temperatures, as defined by results from differential thermal analysis (DTA). The composition of the crystalline phases precipitated in the glassy matrix as a result of heat treatments at different temperatures, ranging from 681 to 725 ° C, was determined from X-ray diffraction data. The sequence of phase crystallization in the mother glass was also studied in situ using high temperature X-ray diffraction (HT-XRD) analysis. Results showed that the first phases that precipitated in the glass matrix were α-and β-Ca2P2O7 at 620 ° C. A small amount of CaTi4(PO4)(6) appeared at 630 ° C. At 650 ° C the three phases α-Ca2P2O7, β-Ca2P2O7 and CaTi4(PO4)(6) were clearly presented with a small amount of TiP2O7 and finally at 660 ° C all four phases were observed. Glass ceramics were also characterized using Raman and X-ray photoelectron spectroscopy. This study demonstrates that, by altering the heat treatment cycle, it is possible to prepare glass ceramics in the calcium phosphate system that contains different bioactive and biocompatible phases. © 2005 Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)810-817
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume351
DOIs
Publication statusPublished - 2005

Keywords

  • MECHANICAL-PROPERTIES
  • CRYSTALLIZATION
  • SYSTEM
  • BONE
  • PYROPHOSPHATE
  • BETA-CA2P2O7
  • IMPROVEMENT
  • RAMAN

Cite this

@article{6e04e237c3da4af1800f703a716304c6,
title = "In situ thermal and structural characterization of bioactive clacium phosphate glass ceramics containing TiO2 and MgO oxides: High temperature - XRD studies",
abstract = "This study aims to develop glass ceramics in the calcium phosphate system that exhibit suitable properties to be used for biomedical applications. Calcium phosphate glasses with the incorporation of small additions of MgO and TiO2 oxides were prepared in the pyro-and orthophosphate regions. The glass ceramics were prepared by a controlled powder sintering process through heat-treatment at different temperatures, as defined by results from differential thermal analysis (DTA). The composition of the crystalline phases precipitated in the glassy matrix as a result of heat treatments at different temperatures, ranging from 681 to 725 ° C, was determined from X-ray diffraction data. The sequence of phase crystallization in the mother glass was also studied in situ using high temperature X-ray diffraction (HT-XRD) analysis. Results showed that the first phases that precipitated in the glass matrix were α-and β-Ca2P2O7 at 620 ° C. A small amount of CaTi4(PO4)(6) appeared at 630 ° C. At 650 ° C the three phases α-Ca2P2O7, β-Ca2P2O7 and CaTi4(PO4)(6) were clearly presented with a small amount of TiP2O7 and finally at 660 ° C all four phases were observed. Glass ceramics were also characterized using Raman and X-ray photoelectron spectroscopy. This study demonstrates that, by altering the heat treatment cycle, it is possible to prepare glass ceramics in the calcium phosphate system that contains different bioactive and biocompatible phases. © 2005 Published by Elsevier B.V.",
keywords = "MECHANICAL-PROPERTIES, CRYSTALLIZATION, SYSTEM, BONE, PYROPHOSPHATE, BETA-CA2P2O7, IMPROVEMENT, RAMAN",
author = "Dias, {A. G.} and Skakle, {Janet Mabel Scott} and Gibson, {Iain Ronald} and Lopes, {M. A.} and Santos, {J. D.}",
year = "2005",
doi = "10.1016/j.jnoncrysol.2005.01.060",
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volume = "351",
pages = "810--817",
journal = "Journal of Non-Crystalline Solids",
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TY - JOUR

T1 - In situ thermal and structural characterization of bioactive clacium phosphate glass ceramics containing TiO2 and MgO oxides: High temperature - XRD studies

AU - Dias, A. G.

AU - Skakle, Janet Mabel Scott

AU - Gibson, Iain Ronald

AU - Lopes, M. A.

AU - Santos, J. D.

PY - 2005

Y1 - 2005

N2 - This study aims to develop glass ceramics in the calcium phosphate system that exhibit suitable properties to be used for biomedical applications. Calcium phosphate glasses with the incorporation of small additions of MgO and TiO2 oxides were prepared in the pyro-and orthophosphate regions. The glass ceramics were prepared by a controlled powder sintering process through heat-treatment at different temperatures, as defined by results from differential thermal analysis (DTA). The composition of the crystalline phases precipitated in the glassy matrix as a result of heat treatments at different temperatures, ranging from 681 to 725 ° C, was determined from X-ray diffraction data. The sequence of phase crystallization in the mother glass was also studied in situ using high temperature X-ray diffraction (HT-XRD) analysis. Results showed that the first phases that precipitated in the glass matrix were α-and β-Ca2P2O7 at 620 ° C. A small amount of CaTi4(PO4)(6) appeared at 630 ° C. At 650 ° C the three phases α-Ca2P2O7, β-Ca2P2O7 and CaTi4(PO4)(6) were clearly presented with a small amount of TiP2O7 and finally at 660 ° C all four phases were observed. Glass ceramics were also characterized using Raman and X-ray photoelectron spectroscopy. This study demonstrates that, by altering the heat treatment cycle, it is possible to prepare glass ceramics in the calcium phosphate system that contains different bioactive and biocompatible phases. © 2005 Published by Elsevier B.V.

AB - This study aims to develop glass ceramics in the calcium phosphate system that exhibit suitable properties to be used for biomedical applications. Calcium phosphate glasses with the incorporation of small additions of MgO and TiO2 oxides were prepared in the pyro-and orthophosphate regions. The glass ceramics were prepared by a controlled powder sintering process through heat-treatment at different temperatures, as defined by results from differential thermal analysis (DTA). The composition of the crystalline phases precipitated in the glassy matrix as a result of heat treatments at different temperatures, ranging from 681 to 725 ° C, was determined from X-ray diffraction data. The sequence of phase crystallization in the mother glass was also studied in situ using high temperature X-ray diffraction (HT-XRD) analysis. Results showed that the first phases that precipitated in the glass matrix were α-and β-Ca2P2O7 at 620 ° C. A small amount of CaTi4(PO4)(6) appeared at 630 ° C. At 650 ° C the three phases α-Ca2P2O7, β-Ca2P2O7 and CaTi4(PO4)(6) were clearly presented with a small amount of TiP2O7 and finally at 660 ° C all four phases were observed. Glass ceramics were also characterized using Raman and X-ray photoelectron spectroscopy. This study demonstrates that, by altering the heat treatment cycle, it is possible to prepare glass ceramics in the calcium phosphate system that contains different bioactive and biocompatible phases. © 2005 Published by Elsevier B.V.

KW - MECHANICAL-PROPERTIES

KW - CRYSTALLIZATION

KW - SYSTEM

KW - BONE

KW - PYROPHOSPHATE

KW - BETA-CA2P2O7

KW - IMPROVEMENT

KW - RAMAN

U2 - 10.1016/j.jnoncrysol.2005.01.060

DO - 10.1016/j.jnoncrysol.2005.01.060

M3 - Article

VL - 351

SP - 810

EP - 817

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

ER -