Publication: Fabrication of silicon nitride dental core ceramics with borosilicate veneering material
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Issued Date
2011
Resource Type
File Type
application/pdf
ISSN
17578981
Other identifier(s)
2-s2.0-80052093276
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
IOP Conference Series: Materials Science and Engineering. Vol 18, No.SYMPOSIUM 13 (2011), p.-
Suggested Citation
Wananuruksawong R., Jinawath S., Padipatvuthikul P., Wasanapiarnpong T. Fabrication of silicon nitride dental core ceramics with borosilicate veneering material. IOP Conference Series: Materials Science and Engineering. Vol 18, No.SYMPOSIUM 13 (2011), p.-. doi:10.1088/1757-899X/18/19/192010 Retrieved from: https://hdl.handle.net/20.500.14740/7255
Abstract
Silicon nitride (Si3N4) ceramic is a great candidate for clinical applications due to its high fracture toughness, strength, hardness and bio-inertness. This study has focused on the Si3N4 ceramic as a dental core material. The white Si3N4 was prepared by pressureless sintering at relative low sintering temperature of 1650 °C in nitrogen atmosphere. The coefficient of thermal expansion (CTE) of Si3N4 ceramic is lower than that of Zirconia and Alumina ceramic which are popular in this field. The borosilicate glass veneering was employed due to its compatibility in thermal expansion. The sintered Si 3N4 specimens represented the synthetic dental core were paintbrush coated by a veneer paste composed of borosilicate glass powder (<150 micrometer, Pyrex) with 5 wt% of zirconia powder (3 wt% Y 2O3 - partial stabilized zirconia) and 30 wt% of polyvinyl alcohol (5 wt% solution). After coating the veneer on the Si3N 4 specimens, the firing was performed in electric tube furnace between 1000-1200°C. The veneered specimens fired at 1100°C for 15 mins show good bonding, smooth and glossy without defect and crazing. The veneer has thermal expansion coefficient as 3.98×10-6 °C-1, rather white and semi opaque, due to zirconia addition, the Vickers hardness as 4.0 GPa which is closely to the human teeth. © 2011 Ceramic Society of Japan.
Subject(s)
Alumina ceramic
Clinical application
Core material
Human teeths
Low sintering temperature
Nitrogen atmospheres
Pressureless sintering
Stabilized zirconia
Thermal expansion coefficients
Tube furnaces
Zirconia powders
Biomimetics
Ceramic materials
Coremaking
Expansion
Fracture toughness
Silicon
Silicon nitride
Sintering
Thermal expansion
Veneers
Vickers hardness
Zirconia
Borosilicate glass
Clinical application
Core material
Human teeths
Low sintering temperature
Nitrogen atmospheres
Pressureless sintering
Stabilized zirconia
Thermal expansion coefficients
Tube furnaces
Zirconia powders
Biomimetics
Ceramic materials
Coremaking
Expansion
Fracture toughness
Silicon
Silicon nitride
Sintering
Thermal expansion
Veneers
Vickers hardness
Zirconia
Borosilicate glass