Effect of sintering conditions on mechanical and optical properties of 3Y-TZP dental ceramic
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Publication Details
Author list: Dateraksa K., Ngernbamrung S., McCuiston R.
Publisher: Trans Tech Publications
Publication year: 2014
Volume number: 608
Start page: 181
End page: 186
Number of pages: 6
ISBN: 9783038350637
ISSN: 1013-9826
eISSN: 1662-9795
Languages: English-Great Britain (EN-GB)
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Abstract
The use of zirconia dental ceramics has grown in recent years due to improvements in esthetics and biocompatibility. Zirconia is used in dental applications for its high strength and fracture toughness. In this research, the influence of sintering conditions on the strength and optical properties of zirconia was investigated. Spray dried granules of 3Y-TZP zirconia were die pressed into disc-shaped samples and cold isostatic pressed at 250 MPa. Sintering was conducted using either one step sintering at 1500 ฐC or two-step sintering, with pre-sintering at 1200 ฐC and final sintering at 1500 ฐC. Heating rates of 2 and 10 ฐC/min were used. The biaxial flexural strength, fracture toughness, density, microstructural characteristics and optical properties of the sintered samples were determined. It was found that the sintering conditions did appear to influence the mechanical and optical properties. The sintering conditions had no significant effect on the density. It was concluded that for the sintering conditions examined, the two-step sintering with a heating rate of 2 ฐC/min produced the best average mechanical and optical properties of 3Y-TZP zirconia. ฉ (2014) Trans Tech Publications, Switzerland.
Keywords
Dental ceramics, Esthetics, Properties, Zirconia
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