Alkali-free bioactive diopside-tricalcium phosphate glass-ceramics for scaffold fabrication: Sintering and crystallization behaviours

Saurabh Kapoor, Ashutosh Goel, Maria J. Pascual, José M.F. Ferreira

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The sintering and crystallization behaviours of alkali-free bioactive glass compositions designed in the diopside (CaO·MgO·2SiO2)-tri-calcium phosphate (3CaO·P2O5) binary join by varying the Di/TCP ratios were investigated by hot-stage microscopy and differential thermal analysis, respectively. The effects of non-isothermal heating for 1 h at 900, 1000 and 1200 °C on the structural changes were assessed by solid-state magic angle spinning nuclear magnetic resonance (MAS-NMR) and crystalline phase assemblage. The influence of the heat treatment temperature on 3 point bending strength was also investigated. Diopside and hydroxyapatite formed as primary crystalline phases, accompanied by calcium silicate as secondary phase, in samples are sintered at 900 °C and 1000 °C. With further increase of the heat treatment temperature to 1200 °C, whitlockite that was stated appearing in some compositions at 1000 °C, appeared as main crystalline phase after diopside as a result of hydroxyapatite transformation. The data gathered was highly relevant towards setting the experimental conditions required for preparing well sintered and mechanically strong glass/glass-ceramic scaffolds for bone regeneration and tissue engineering applications.

Original languageEnglish (US)
Pages (from-to)81-89
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume432
DOIs
StatePublished - Jan 15 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Keywords

  • Bioactive glass-ceramics
  • Diopside
  • Sintering
  • Strong mechanical properties
  • Tricalcium phosphate

Fingerprint Dive into the research topics of 'Alkali-free bioactive diopside-tricalcium phosphate glass-ceramics for scaffold fabrication: Sintering and crystallization behaviours'. Together they form a unique fingerprint.

Cite this