Catalysis, nanostructure and macroscopic property triangle in bioactive calcium-containing ceramic systems

Anikó Meiszterics, Károly Havancsák, Katalin Sinkó

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Calcium silicate ceramics are intended for application as long-term implant materials. In the present work, attention was paid to understand the correlations between the nanostructure (aggregate size, crystallinity, porosity) and the macroscopic properties (solubility in water and simulated body fluids, SBF; hardness) varying the chemical composition. Varying the catalyst (from a base to various acids) during the chemical synthesis was shown to significantly impact on the pore size, crystallinity and mechanical properties. The basic catalyst yields the ceramics with the highest mechanical strength. Ammonia used in 1.0 or 10.0 molar ratio results in bulk ceramics with parameters required for a biomedical application, good hardness (180-200 HV) and low solubility (1-3%) in water and in SBF. The fine porosity (∼ 50 nm) and homogeneous amorphous structure induce good mechanical character.

Original languageEnglish
Pages (from-to)1371-1379
Number of pages9
JournalMaterials Science and Engineering C
Volume33
Issue number3
DOIs
Publication statusPublished - Apr 1 2013

Keywords

  • Bioceramic
  • Calcium silicate
  • Hardness
  • SEM
  • Sol-gel process
  • Solubility

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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