Abstract

Bismuth oxide (Bi2O3) is an effective additive used to enhance radiography resolution for dental materials. However, there are potential concerns regarding its biocompatibility and connection to tissue discoloration. In the present study, we modified the radiopacity properties of Bi2O3 with zirconium oxide (ZrO2) using a sol-gel process and investigated the composition, as well as the effects of heat treatment temperature using Thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The harvested Bi2-xZrxO3+x/2 particles showed that the dominant phase transferred from α-Bi2O3 to β-Bi7.38Zr0.62O12.31 after a heat treatment of over 750 °C for 2 h. As the x values of Bi2-xZrxO3+x/2 increased from 0.2 to 1.0, more zirconium oxide precipitated onto the particle surface, thus enhancing the surface roughness of particles. For sol-gel Bi1.8Zr0.2O3.1 powders (x = 0.2), the radiopacity values became 4.90 ± 0.23 and 5.83 ± 0.22 mmAl after a heat treatment of 500 °C and 750 °C, respectively.

Original languageEnglish
Article number1685
JournalMaterials
Volume11
Issue number9
DOIs
Publication statusPublished - Sep 11 2018

Fingerprint

Powders
Sol-gel process
Sintering
Heat treatment
Zirconia
Dental materials
Dental Materials
Discoloration
Radiography
Bismuth
Biocompatibility
Temperature
Particles (particulate matter)
Sol-gels
Fourier transform infrared spectroscopy
Thermogravimetric analysis
Differential scanning calorimetry
Surface roughness
Tissue
Transmission electron microscopy

Keywords

  • Bismuth oxide
  • Mineral trioxide aggregate
  • Radiopacity
  • Sol-gel process
  • Zirconia

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Sintering temperature-dependence on radiopacity of Bi(2-x) ZrxO(3+x/2) powders prepared by sol-gel process. / Chen, May Show; Chen, Shih Hsun; Lai, Fu Chih; Chen, Chin Yi; Hsieh, Ming Yuan; Chang, Wei Jen; Yang, Jen Chang; Lin, Chung Kwei.

In: Materials, Vol. 11, No. 9, 1685, 11.09.2018.

Research output: Contribution to journalArticle

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