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Effects of flux concentrations and sintering temperature on dental porcelain

Published online by Cambridge University Press:  14 February 2014

Polash Ghose ,
Md. Abdul Gafur ,
Sujan Kumar Das ,
Shyamal Ranjan Chakraborty ,
Md. Mohsin ,
Arun Kumar Deb  and
Md. Rakibul Qadir
Polash Ghose
Affiliation:
Department of Physics, University of Chittagong, Chittagong 4331, Bangladesh
Md. Abdul Gafur
Affiliation:
Pilot Plant & Project Development Center, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
Sujan Kumar Das*
Affiliation:
Department of Physics, University of Chittagong, Chittagong 4331, Bangladesh
Shyamal Ranjan Chakraborty
Affiliation:
Department of Physics, University of Chittagong, Chittagong 4331, Bangladesh
Md. Mohsin
Affiliation:
Department of Physics, University of Chittagong, Chittagong 4331, Bangladesh
Arun Kumar Deb
Affiliation:
Department of Physics, University of Chittagong, Chittagong 4331, Bangladesh
Md. Rakibul Qadir
Affiliation:
Pilot Plant & Project Development Center, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
*
aemail: skdas@cu.ac.bd
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Abstract

In this study, samples of dental porcelain bodies have been made by using the materials collected from selected deposits employing different mixing proportions of clay, quartz and feldspar. Dental porcelain ceramics have been successfully fabricated by using the sintering technique together with some Na2CO3 additive. The dental porcelain powder has been pressed into pellets at first and subsequently sintered at 700, 800, 900, 1000 and 1100 °C for 2 h. The physical and mechanical properties of the prepared samples have been investigated. The sintering behavior of the fired samples has been evaluated by bulk density, linear shrinkage, water absorption and apparent porosity measurements. This study includes the evaluation of the Vickers’s microhardness by microhardness tester. Phase analysis and microstructural study have been performed by XRD and optical microscope respectively. Optical properties have been investigated using UV-visible spectroscopy. Influence of firing conditions on leucite formation, densification and microstructural development of the sintered samples has been investigated. It has been found that the choice of sintering temperature is one of the key factors in controlling leucite crystallization in dental porcelain ceramics. It has also been found that the flux concentration of material and the effect of temperature on preparation of dental porcelain contribute to the firing shrinkage and hardness, which has been found to increase with the increase of treatment temperature.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 65 , Issue 2 , February 2014 , 20701
Copyright
© EDP Sciences, 2014

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