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.

Details

Title
Sintering Temperature-Dependence on Radiopacity of Bi(2−x) ZrxO(3+x/2) Powders Prepared by Sol-Gel Process
Author
May-Show, Chen 1 ; Chen, Shih-Hsun 2   VIAFID ORCID Logo  ; Fu-Chih Lai 3 ; Chin-Yi, Chen 4 ; Ming-Yuan Hsieh 4 ; Wei-Jen, Chang 5 ; Jen-Chang, Yang 6 ; Chung-Kwei, Lin 7 

1  School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan; Department of Dentistry, Taipei Medical University Hospital, Taipei 11031, Taiwan 
2  Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan 
3  College of Nursing, Taipei Medical University, Taipei 11031, Taiwan 
4  Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwan 
5  School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; Dental Department, Taipei Medical University, Shuang-Ho Hospital, New Taipei 235, Taiwan 
6  School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; Graduate Institute of Nanomedicine and Medical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 110-52, Taiwan 
7  School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan; Research Center of Digital Oral Science and Technology, College of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan 
First page
1685
Publication year
2018
Publication date
2018
Publisher
MDPI AG
e-ISSN
19961944
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.3390/ma11091685
ProQuest document ID
2607321651
Copyright
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.