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Morphological investigation by AFM of dental ceramics under thermal processing

E. GATIN1,2,* , C. LUCULESCU3, S. IORDACHE4, I. PĂTRAŞCU2

Affiliation

  1. University of Bucharest, Faculty of Physics, Department Science Materials, P.O. Box MG 11, Bucharest-Măgurele, Romania
  2. University of Medicine ‘Carol Davila’, Faculty of Dentistry, Calea Plevnei 19, Sect.5, Bucharest, Romania
  3. INFLPR, National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG- 36, Maăgurele – Bucharest, Romania
  4. University of Bucharest, Physics Department, 3Nano-SAE Research Centre, P.O.Box MG-38, Cod 077125 Măgurele, Romania

Abstract

Two of the most used dental ceramic materials are alumina (based on Al2O3) and zirconia (based on ZrO2). The influence of heating treatment on dental ceramics during their manufacturing process (for applying veneer and glazer) was investigated. Alumina ceramic is more affected at the morphological level by the thermal process, predicting a grain size diameter control to a decreasing value, less or about the value dG 1.137 µm and almost a constant value for pore diameter size d P 2 µm. The affected depth inside the material of alumina core, caused by the thermal process, was estimated at the value, d = 7.400 ± 0.510 µm. The smaller size for zirconia micro grains (morphologically not influenced by the heating temperature process involved in our study) predicts a possible modeling of the alumina surface with zirconia by grain infiltration. Those (zirconia grains) are acting as a grain stopper for the alumina sample cooling period.

Keywords

: Dental ceramic, Crystal grain, Frozen phase, Modellin.

Submitted at: June 21, 2013
Accepted at: Sept. 18, 2013

Citation

E. GATIN, C. LUCULESCU, S. IORDACHE, I. PĂTRAŞCU, Morphological investigation by AFM of dental ceramics under thermal processing, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 9-10, pp. 1136-1141 (2013)