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Effects of SiO2 and 3Y-TZP on Mechanical Properties of Zircon

SiO2와 3Y-TZP 첨가가 지르콘의 기계적 물성에 미치는 영향

  • Received : 2016.01.19
  • Accepted : 2016.02.26
  • Published : 2016.04.27

Abstract

Zircon, having excellent thermal, chemical, and mechanical properties, is utilized in refractory materials, electronic materials, chemical machines, structural materials, etc. However, zircon generally shows thermal dissociation to zirconia($ZrO_2$) and silica($SiO_2$) around the sintering temperature of $1540^{\circ}C$, and when zircon particles are small and impurities are present, thermal dissociation is known to occur at around $1100^{\circ}C$. This reduces the mechanical properties of $ZrSiO_4$. In this research, the effect of adding $SiO_2$ and 3Y-TZP to $ZrSiO_4$ has been studied in order to suppress dissociation and improve the mechanical properties. Addition of $SiO_2$ suppressed the dissociation of $ZrSiO_4$ at lower temperatures. It also enabled optimum packing between the particles, resulting in a dense microstructure and good mechanical properties. When 3Y-TZP was added, recombination with the dissociated $SiO_2$ resulted in good mechanical properties by suppressing the generation of pores and the densification of the microstructure.

Keywords

zircon;zirconia;silica;thermal dissociation

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Cited by

  1. vol.54, pp.11, 2017, https://doi.org/10.1080/00223131.2017.1359117