Radiopacity performances of precipitated ZrO2-doped Bi2O3 powders and the influences of dopant concentrations and sintering temperatures

May Show Chen, Jen Chang Yang, Fu Chih Lai, Chin Yi Chen, Ming Yang Hsieh, Alex Fang, Shih Hsun Chen, Chung Kwei Lin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, Bi2O3 powders were modified into ZrO2-doped Bi2O3 powders by adding zirconium oxide through precipitation processes. The radiopacity and physical properties of as-synthesized and heat-treated products were investigated. The products were primarily composed of a mixture of β-Bi7.38Zr0.62O12.31 and α-Bi2O3 obtained below 700°C, then transferred to β-Bi7.38Zr0.62O12.31 phase above 750°C. With regard to zirconia dopant concentration effects, more zirconium oxide precipitated onto the Bi2O3 surface as the x values of Bi2-xZrxO3+x/2 increased from 0.2 to 1.0. As the x value of Bi2-xZrxO3+x/2 powder increased, so too did the surface roughness as a result of zirconia precipitation. In terms of temperature effect, increasing heating temperatures resulted in a smoother powder surface due to liquid phase sintering effect. As for radiopacity analysis, the performances were significantly improved by heat treatments and the effects generally enhanced with increasing temperatures. The overall maximum radiopacity value measured after an 800°C heat treatment was 5.57±0.28mm Al for precipitated ZrO2-doped Bi2O3 powders at x=0.2.

Original languageEnglish
Pages (from-to)14008-14014
JournalCeramics International
Volume43
Issue number16
DOIs
Publication statusPublished - Nov 2017

Keywords

  • Bismuth oxide
  • Mineral trioxide aggregate
  • Precipitation process
  • Radiopacity
  • Zirconia

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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