A Study on The Glass-Ceramics Containing Fluorine

불소 함유 결정화유리에 관한 연구

  • 박용완 (한양대학교 무기재료공학과) ;
  • 현부성 (한양대학교 무기재료공학과) ;
  • 김창렬 (한양대학교 무기재료공학과)
  • Published : 1992.10.01

Abstract

The batches having excess SiO2 to tetrasilicic mica KMg2.5 (Si4O10)F2 were melted at 1450℃. The fabricated samples were heat-treated for the nucleation and the crystallization. The crystallized samples were investigated on several properties. The tetrasilicic mica composition with excess 10 wt% SiO2 was successful both in glassifying and in crystallizing. The optimum temperatures for the nucleation and the crystallization were 680℃ and 1000-1100℃, respectively. The mica and the cristobalite crystallines were identified after heat-treatment. The properties of the samples processed appropriately were as follows, bulk density 2.64g/㎤, thermal expansion coefficient ∼80×10-7/℃, Vicker's hardness ∼105 Kgf/㎟, bending strength ∼666Kgf/㎟, dielectric constant ∼11.1, tan δ 2.5%, volume resistivity 2.35×107∼1.3×1011{{{{ OMEGA }}cm, surface roughness 6.984㎛.

Keywords

References

  1. ニユ-ガラス 作花滂未
  2. New Ceramics v.12 マツナブル セラミツクス メ-カ-各社の製品紹介
  3. セぅミツクス v.15 no.3 合成雲母 マツナブルセラミツクスとして 大門信利
  4. Yogyo-Kyo-kai-Shi v.89 no.11 Preparation of Mica-Ceramics by solidification of Fluorine-containing K₂O-MgO-SiO₂ Melts Nobuo Takusagawa;Kunio Kitajima;Terashima
  5. Yogyo-Kyokai-Shi v.90 no.4 Crystallization of Mica from Glasses with Composition of Lead-fluorphlogophite Toru Matsushita;Masayuki Shiratori;Atsmu Tsunashima;Kohei Kodaira
  6. J. Am. Ceram. Soc v.71 no.12 Preparation and Characterization of Machinable Mica-Ceramics by the Sol-Gel Process Hamasaki(et al.)
  7. Amer. Mineral v.50 no.7 Synthesis of New Mica, F. Seifert;Schreyer
  8. J. Am. Ceram. Soc v.55 no.9 Machinable Glass-Ceramics Based on Tetrasilicic Mica D.G. Grossman
  9. J. Am. Ceram. Soc v.58 no.5 Crystallization of Tetrasilicic Fluormica Glass W.H. Danels;R.E. Moore
  10. Glass Ceramics P.W. McMillan
  11. Yogyo-Kyokai-Shi v.85 no.12 Crystalline Phases Precipitated in the Early Stage of Crystallization of Fluorine-containing K₂O-MgO-SiO₂ Glasses Nobuo Takusagawa;Seiji Yamada;Nobutoshi Daimon
  12. グぅス非晶質の科學 作花滂未