| Texto completo | |
| Autor(es): |
Saggioro, Ana Clara Bortolucci
;
Fernandes, Leandro
;
Villas-Boas, Mariana de Oliveira Carlos
;
Salomao, Rafael
;
Pinelli, Ligia Antunes Pereira
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 28, p. 7-pg., 2025-01-01. |
| Resumo | |
Zirconia-toughened alumina (ZTA) is a promising material for dentistry; however, its current formulation exhibits a mauve coloration. This study aimed to synthesize a white ZTA ceramic by doping it with 0.7 wt% magnesium oxide (MgO). Specimens (1.2 mm in thickness x 12 mm in diameter) were divided into 3 groups (n = 15): ZTA doped with chromium oxide (ZTA-Cr2O3), ZTA doped with MgO (ZTA-MgO) and ICE-Zirkon (control group). The materials were analyzed using X-ray diffraction, energy-dispersive X-ray fluorescence spectrometer, scanning electron microscopy, and spectrophotometer. Biaxial flexural strength was conducted, and the Weibull modulus (m) and probability of failure were calculated. ZTA-MgO group had a white color, showing the pattern for alumina and zirconia grains in ZTA with a typical composition of the materials. It demonstrated superior BFS (915 +/- 41 MPa) and higher reliability than the ZTA-Cr2O3. ZTA-MgO proved to be able to produce white ZTA for future use in dentistry. (AU) | |
| Processo FAPESP: | 18/19773-3 - Refratários microporosos moldáveis no sistema Al2O3-MgO-CaO para isolamento térmico acima de 1200ºC |
| Beneficiário: | Rafael Salomão |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |