Sintering behavior and devitrification kinetics of iron containing clinopyroxene based magnetic glass-ceramics

Ashutosh Goel, Essam R. Shaaban, J. B. Oliveira, M. A. Sá, Maria J. Pascual, José M.F. Ferreira

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The present study deals with the design, synthesis and characterization of magnetic glass-ceramics along diopside (CaMgSi2O6)- aegirine (NaFeSi2O6) join targeted towards their final application as thermoseeds in hyperthermia. The glass-ceramics were prepared from the sintering and crystallization of glass powders obtained through melt-quenching technique. The sintering behavior of glass powders was studied by hot-stage microscopy (HSM) while differential thermal analysis (DTA) was used to study the non-isothermal crystallization kinetics of the as prepared glasses. In order to analyze the crystallization behavior of glasses, the glass powder compacts were sintered at 900 °C for 1 h under non-isothermal conditions. The qualitative as well as quantitative crystalline phase analysis of glass-ceramics has been made by X-ray diffraction (XRD)-adjoined with Rietveld-RIR technique. Augite crystallized as the primary phase in all the compositions. The scanning electron microscopy (SEM) was used to shed light on the microstructure of the glass-ceramics while the magnetic properties of glass-ceramics were studied by vibration sample magnetometer (VSM). All the investigated glass-ceramics exhibited ferromagnetic behavior the intensity of which increased with increase in Fe content in the samples. The dependence of magnetic properties on the composition of glass-ceramics has been explained.

Original languageEnglish (US)
Pages (from-to)59-68
Number of pages10
JournalSolid State Ionics
Volume186
Issue number1
DOIs
StatePublished - Mar 25 2011

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Keywords

  • Clinopyroxene
  • Crystallization
  • Diopside
  • Hyperthermia
  • Magnetic glass-ceramic
  • Sintering

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