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Abstract <p>Artificial teeth were manufactured from zirconia-yttria nano systems, zirconia-yttria-soda lime glass, zirconia-yttria-pyrex, and zirconia-yttria-silica with different weight ratios. The specimens were formed by using a single-stage hydraulic press of 3 tons and then sintered at 1100°C for soda-lime glass, 1200°C for Pyrex, and 1400°C for silica. Structural properties X-ray diffraction (XRD) tests were performed, and tests of physical properties: apparent porosity, apparent density, water absorption, and surface roughness. Results of X-ray diffraction showed that the mean phase is the tetragonal phase for zirconia, while the monoclinic phase appeared in a small ratio due to the stabilizing process by yttria since works to stop phase transformations with the appearance of glass phase. The results of the study of physical properties showed an increase in density and a decrease in porosity, the zirconia-yttria-soda lime glass system is the best because the porosity is low and reaches close to zero 0.01.</p>

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The Effect of Adding Glass or Silica on the Structural and Physical Properties for Zirconia

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Nadia A. Assy,
  • Saja M. Jawad,
  • Enas M. Hadi

摘要

Abstract

Artificial teeth were manufactured from zirconia-yttria nano systems, zirconia-yttria-soda lime glass, zirconia-yttria-pyrex, and zirconia-yttria-silica with different weight ratios. The specimens were formed by using a single-stage hydraulic press of 3 tons and then sintered at 1100°C for soda-lime glass, 1200°C for Pyrex, and 1400°C for silica. Structural properties X-ray diffraction (XRD) tests were performed, and tests of physical properties: apparent porosity, apparent density, water absorption, and surface roughness. Results of X-ray diffraction showed that the mean phase is the tetragonal phase for zirconia, while the monoclinic phase appeared in a small ratio due to the stabilizing process by yttria since works to stop phase transformations with the appearance of glass phase. The results of the study of physical properties showed an increase in density and a decrease in porosity, the zirconia-yttria-soda lime glass system is the best because the porosity is low and reaches close to zero 0.01.