Preparation and properties of cordierite glass-ceramic as veneer porcelain for silicon nitride dental ceramics. Issue 13 (October 2022)

• Record Type: Journal Article
• Authors: Jiang, Lei; Wang, Tong; Yin, Shuang; Luo, Tao; Fang, Xia; Yuan, Jun; Tang, Xuehua; Wang, Yang; Li, Quan; Yang, Jian
• Is Part Of: Journal of the European Ceramic Society. Volume 42:Issue 13(2022)
• Page Start: 6182
• Page End: 6191
• Publication Date: 2022-10
• Subjects: Cordierite -- Glass-ceramics -- Silicon nitride -- Veneer porcelain -- Coefficient of thermal expansion; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2022.06.072
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: To develop thermally matched veneer porcelain for silicon nitride as potential dental ceramics, cordierite glass-ceramics with TiO2 and ZrO2 as nucleating agents and CaCO3 as sintering aids were prepared by sintering method. The cordierite glass-ceramics prepared by sintering and crystallization at 1100 °C for 1 h show the best comprehensive properties and meet the ISO 6872:2015 with flexural strength of 95 MPa, fracture toughness of 1.56 MPa·m 1/2, Vickers hardness of 5.06 GPa, coefficient of thermal expansion of 2.99 × 10 −6 /°C and chemical solubility of 60 μg/cm 2, respectively, and no cytotoxicity. The chromaticity values L * , a * , b * were 93.84, − 0.18 and 7.10 respectively, which still needs to be slightly adjusted to fall into the range of natural tooth. Interface bonding of cordierite glass-ceramics/Si3 N4 ceramics was preliminarily explored by powder coating, sintering and shear strength tests, which exhibits a bonding strength up to 7.75 MPa and a hybrid mode of cohesive and adhesive failure.