Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of $SiO_2$ on the Properties of $CaO-Al_2O_3$ Glasses

$CaO-Al_2O_3$계 유리의 물성에 미치는 $SiO_2$의 영향

  • 원종원 (한양대학교 무기재료공학과) ;
  • 박용완 (한양대학교 무기재료공학과)
  • Published : 1994.04.01
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Abstract

Calcium aluminate glasses transmit light at relatively long wavelengths up to 6 ㎛ and exhibit also low Rayleigh scattering values. However they have a tendency to get devitrified easily, which limits their use as routine optical materials. Here, the ternary system CaO-Al2O3-SiO2 glasses with low-silica (<30 mol%) were prepared to prevent the devitrification of CaO-Al2O3 glasses and the properties were investigated as functions of composition. The addition of SiO2 to calcium aluminate glasses promoted their stability, which was due to the decrease of non-bridging oxygens and the reconnection of network. As SiO2 was added, density, refractive index, molar volume of oxygens and thermal expansion coefficient decreased continuously. But the glass transition temperatures with increasing SiO2 contents were raised and then lowered. It was postulated that the anomaly was related to the changes of the middle range order as well as the short range order. As the amount of SiO2 in the glass was increased, the IR cut-off values moved to shorter wavelength owing to 'Si-O' antisymetric stretching vibration. The IR cut-off wavelength of the glasses with 5 and 30 mol% SiO2 was 4.90, 4.55 ㎛, respectively.

Keywords

References

  1. J. Am. Ceram. Soc. v.41 no.315-323 Optical and Physical Properties of Some Calcium Aluminate Glasses H.C. Hanfiner;N.J. Kreidl;R.A. Weidel
  2. Glass Technology v.19 no.2 Delopment of Calcium Aluminate Glasses for Use in the infrared spectrum to 5μm J.R. Davy
  3. J. Non-Cryst Solids v.103 no.279-289 A Passible Non-Halide Route to Ultra-Low Loss Glasses M.E. Lines
  4. J Non-Cryst. Solids v.107 no.251-260 Calcium Aluminate Glasses as Potential Ultralow-Loss Optical Materials at 1.5-1.9μm M.E. Lines;J.B. $Ma_c$chesney;K.B. Lyons;A.J. Bruce;A.E. Miller;J. Nassue
  5. J. Am. Ceram. Soc. v.70 no.867-874 Photosensitive Characteristics of Dopant-Free, Ultraviolet-Sensitive Calcium Aluminate Glasses H. Hosono;K. Yamazaki;Y. Abe
  6. J. Appl. Phys v.67 Properties and Mechanism of Photochromism in Reduced Calcium Aluminate Glasses H. Hosono;N. Asada;Y. Abe
  7. こユガラスハンドプノク 境野照雄
  8. J. Non-Cryst. Solids v.126 no.209-215 Glass Formation and Thermal Properties of Low-Silica Calcium Aluminosilicate Glasses P.L. Higby;R.J. Ginther;I.D. Aggarwal;E.J Friebele
  9. J. Am. Ceram. Soc. v.68 no.3 Formation and Properties of Calcium Aluminosilicate Glasses J.E. Shely
  10. J. Appl. Phys. v.66 no.3 Calcium Fluroaluminate Glasses J.E. Shelby;Cathy M. Show;Marie S. Spess
  11. SPIE Proc. v.1327 no.198-202 Effect of Small Silica Additions on the Properties and Structure of Calcium Aluminate Glasses P.L. Higby;C.I. Merzbacher;I.D. Aggarwal;E.J. Friebele
  12. J. Non-Cryst. Solids v.136 no.249-259 $29^Si$ NMR and Infrared Reflectance Spectroscopy of Low-Silica Calcium Aluminosilicate Glasses C.I. Merzbacher;K.J. McGrath;P.L. Higby
  13. Physics and Chemistry of Glasses v.26 no.5 Structural Studies of Calcium Aluminosilicate Glasses by High Resolution Solid State $29^Si$ and $27^Al$ Magic Angle Spinning Nuclear Magnetic Resonance G. Engelhardt;M. Nofz;K. Forkel;F.G. Wihsmann;A. Samoson;E.Lippmaa
  14. J. Non-Cryst. Solids v.136 no.27-36 Structure of Calcium Aluminosilicate Glasses: Wide-Angle X-ray Scattering and Computer Simulation B. Himmel;J. Weight;Th. Gerber;M. Nofz
  15. Physics and Chemistry of Glasses v.32 no.4 A Structural Investigation of High Alumina Glasses in the CaO-Al₂O₃-SiO₂ System via Raman and Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy R.K. Sato;P.F. McMillan;P. Dennison;R. Dupree
  16. J. Non-Cryst. Solids v.56 no.335-360 Structural Analysis of 12CaO·7Al₂O₃Glass H. Morikawa;F. Marumo;T. Koyama;M. Yamane;A. Oyobe
  17. Inorganic Glass Forming Systems H. Rawson
  18. 內田老鶴圃 ガラス非晶貿の科學 作花濟夫
  19. J. Non-Cryst. Solids v.136 no.249-259 Structure and Properties of Calcium Aluminosilicate Glasses C. Haung;E.C. Behrman
  20. Physics and Chemistry of Glasses v.22 no.6 The Incorporation of Aluminum Oxide and Boron Oxide in Sodium Silicate Glasses, Studied by X-ray Photoelectron Spectroscopy B.M.J. Smets;T.P.A. Lommen
  21. Physics and Chemistry of Glasses v.28 no.4 Radeal Distribution Analysis of a Series of Silica Rich Sodium Aluminosilicate Glasses using Energy Dispersive X-ray Diffraction D.A. McKeown
  22. Chemical Approach to Glass Milos B. Volf