Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Crystallization of $K_2O-SiO_2-TiO_2$ Glasses

$K_2O-SiO_2-TiO_2$ 계 유리의 결정화

  • 김성식 (한국과학기술원 재료공학과) ;
  • 박현수 (전남대학교 공대 무기 재료공학과)
  • Published : 1985.02.01
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Abstract

The crystallization behavior of $K_2O-SiO_2$ glasses with added $TiO_2$ and the effect of $TiO_2$ on internal nuleation at temperature in the range of 875 to 121$0^{\circ}C$ have been investigated by means of X-ray diffractometry optical microscopy and scanning electron microscopy. The crystalline phase of these glasses identified by X-ray diffractometry is cristbalite. The scanning electron microspcopy reveals a two-phase layer of dendritic crystals and intersitial melt which grow from the surface at a constant rate, The observed crystallization rates are consistent with a diffusion-controlled mechanism. An equation relating viscosity and undercooling to growth rate is presented.

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References

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