Infiltrated Spinel-Based Ceramic (MgAl2O4) for Dental Application

This work developed a ceramic material for dental application, spinel-base (MgAl2O4), a ceramic material with recognized translucency. Spinel powders were uniaxially pressed at 100 MPa and pre-sintered in order to obtain porous ceramic blocks. The pre-sintered blocks were characterized and indicated...

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Published inMaterials science forum Vol. 881; pp. 176 - 180
Main Authors da Silva, Paula Cipriano, Miranda Pereira, Fernanda de Assis Baião, Magnago, Roberto de Oliveira, dos Santos, Claudinei, de Souza, José Vitor Candido
Format Journal Article
LanguageEnglish
Published Trans Tech Publications Ltd 2017
Subjects
Characterization
Infiltration
Mechanical Properties
Spinel
Dental Materials
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Summary:This work developed a ceramic material for dental application, spinel-base (MgAl2O4), a ceramic material with recognized translucency. Spinel powders were uniaxially pressed at 100 MPa and pre-sintered in order to obtain porous ceramic blocks. The pre-sintered blocks were characterized and indicated 80% of relative density. X-ray diffraction (XRD) only showed MgAl2O4 phase. Samples with 15 x 15 x 1 mm were submitted to infiltration using glass rich in lanthanum (La). The products were characterized by scanning electron microscopy (SEM) and mechanical properties, as hardness and fracture toughness. Results were compared to the commercial product VITA-InCeram Spinell. Relative densities exceeding 92%, hardness around 900 HV and high toughness 2.5 MPa.m1/2 were obtained for both examined systems.
Bibliography:Selected, peer reviewed papers from the 59th Brazilian Ceramic Conference (CBC59), May 17-20, 2015, Barra dos Coqueiros, Brazil
ISSN:0255-5476
1662-9752
1662-9752
DOI:10.4028/www.scientific.net/MSF.881.176