Structural, chemical and optical characterizations of an experimental SiO2-Y-TZP ceramic produced by the uniaxial/isostatic pressing technique

Autor(es)

Mosquim, Victor ^[1] ; Ferrairo, Brunna Mota ^[2] ; Vertuan, Mariele ^[1] ; Magdalena, Aroldo Geraldo ^[3] ; Fortulan, Carlos Alberto ^[4] ; Lisboa-Filho, Paulo Noronha ^[5] ; Cesar, Paulo Francisco ^[6] ; Bonfante, Estevam Augusto ^[2] ; Honorio, Heitor Marques ^[7] ; Sanches Borges, Ana Flavia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Bauru Sch Dent, Dept Operat Dent Endodont & Dent Mat, Bauru, SP - Brazil

^[2] Univ Sao Paulo, Bauru Sch Dent, Dept Prosthodont & Periodont, Bauru, SP - Brazil

^[3] Sao Paulo State Univ, UNESP Sch Sci, Dept Chem, Bauru, SP - Brazil

^[4] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Mech Engn, Sao Carlos, SP - Brazil

^[5] Sao Paulo State Univ, UNESP Sch Sci, Dept Phys, Bauru, SP - Brazil

^[6] Univ Sao Paulo, Sch Dent, Dept Biomat & Oral Biol, Sao Paulo, SP - Brazil

^[7] Univ Sao Paulo, Bauru Sch Dent, Dept Pediat Dent Orthodont & Publ Hlth, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS; v. 106, JUN 2020.
• Citações Web of Science: 0

Resumo

This study aimed to produce a new SiO2+Y-TZP ceramic via uniaxial/isostatic compression that was structurally and chemically characterized relating to its translucency and flexural strength. SiO2 and Y-TZP were mixed using a ball mill, pressed and sintered at 1150 degrees C. The optical and mechanical properties of the specimens were compared to lithium disilicate (LD) and zirconia-reinforced lithium silicate (ZLS) (Kruskal-Wallis, alpha = 0.05). The Fourier Transform Infrared Spectroscopy bands suggested an interaction between Si, O and Zr. Contrast ratio and translucency parameter of the experimental ceramic were higher and lower, (p = 0.000001) respectively, than those of the LD and ZLS. The experimental ceramic presented similar flexural strength to ZLS, but lower than LD (p < 0.0001). It can be concluded that this processing method is efficient to obtain a SiO2+Y-TZP ceramic and 1150 degrees C crystallizes SiO2 without inducing t-m transformation. The SiO2+Y-TZP ceramic presented lower translucency and higher masking ability than the commercially available glass-ceramics, but similar flexural strength to one glass-ceramics. (AU)

• Processo FAPESP: 17/18157-4 - Síntese e caracterização estrutural, física e mecânica de vitrocerâmica de Y-TZP nanoparticulada
• Beneficiário: Victor Mosquim
• Modalidade de apoio: Bolsas no Brasil - Mestrado