Effect of Alumina on the Ion-Exchange Capacity of Porous Glasses

다공질유리의 이온교환성에 미치는 알루미나의 영향

  • 김병호 (고려대학교 재료공학과) ;
  • 이덕열 (고려대학교 재료공학과) ;
  • 김성길 (고려대학교 재료공학과)
  • Published : 1988.03.01


Ion-exchange porous glasses were prepared by heat treatment and subsequently hydro thermalor acid leaching treatment $10Li_2O$.$(90-x)B_2O_3$.$xSiO_2$ base glasses containing various amount of $Al_2O_3$ or $MoO_3$. It was investigated how the phase separation and the cation exchange capacity(CEC) were affected by the addition of $Al_2O_3$ or $MoO_3$. The optimum condition of phase separation in these glasses was about 48$0^{\circ}C$ for 10 hrs. The degree of phase separation was rapidly suppressed by the addition of $Al_2O_3$ up to 10 mol% and thereafter suppression effect was decreased. The maximum value of CEC, about 252meq/100g, was observed with the $1OLi_2O$.$45B_2O_3$.$45SiO_2+7.5Al_2O_3$ porous glass prepared by hydrothermal treatment and its mean pore radius was about 16.3A. The addition of $MoO_3$ accelerated phase separation and leaching rate. Looking at the remakable increment of pore diameter and pore volume of these porous glasses by the addition of $MoO_3$, the effect of $MoO_3$ may be ascribed to the lowering of silica concentration in the borate phase and to the forming of water-soluble complex with silica during the leaching treatment.



  1. U.S. Pat. 2,286,275 Method of Treating Borosilicate Glasses H.P. Hood;M.E. Nordberg
  2. J. Am. Chem. Soc. v.66 The Adsorption of Gases in Multimolecular Layers S. Brunauer;P.H. Emmett;E. Teller
  3. J. Non-Cryst. Solids. v.31 The Leaching of Phase-Separated Sodium Borosilicate Glass A. Makishima;J.D. Mackenzie;J.J. Hammel
  4. J. Chem. Phys. v.46 no.6 Experimental Evidence for Spinodal Decomposition in Glasses of the Na₂O-SiO₂System J.J. Hammel
  5. Adsorption, Surface Area and Porosity S.J. Greg;K.S.W. Sing
  6. Yogyo-Kyokai-Shi v.92 no.9 Effects of Sample Size and Concentration of Leaching Acid on Formation of Colloidal Silica in Porous Glass T. Yazawa;K. Eguchi;T. Yamaguro
  7. J. Am. Ceram. Soc. v.61 Structural Anisotropt and Birefringence in Microporous Glasses T. Takamori
  8. J. Am. Ceram. Soc. v.27 Properties of Some Vycor-Brand Glasses H.P. Hood;M.E. Nordberg
  9. The Sci. and Tech. of Korea Univ. v.23 A Study on the Manufacturing of Ion-Exchange Porous Glasses B.H. Kim;M.J. Park;J.S. Park
  10. KSL 2303
  11. Advances in Catalysis and Related Subjects v.9 The Determination of Pore Structures from Nitrogen Adsoption Isotherms R.W. Cranston;F.A. Inkley;A. Farkas(ed.)
  12. 본학회지 v.21 no.63 다공질유리의 이온교환능과 미세구조 김병호
  13. Silikat Tech. v.9 no.2 Phase Separation and Boron Anomaly in Simple Sodium Borate and Technical Alkali-Borosilicate Glasses W. Skatulla;W. Vogel;H. Wessel
  14. J. Kor. Ceram. Soc. v.21 no.1 Ion Exchange Capacity and Phase Separation of Alkali Borosilicate Glass by Substituting Al₂O₃ B.H. Kim;Y.M. Yu
  15. J. Am. Chem. Soc. v.65 no.7 The Low Temperature Adsorption of Nitrogen, Oxygen, Argon, Hydrogen, n-Butane and Carbon Dioxide on Porous Glass and on Partially Dehydrated Chabazite P.H. Emmett;T. Dewitt
  16. Soil Sci. v.59 Determination of Exchange Capacity and Exchangeable Basis in Soil Ammonium Acetate Method C.J. Schollenberger;R.H. Simmon
  17. Yogyo-Kyokai-Shi v.93 no.3 Effect of Molybdenum Oxide on Pore Characteristics of Porous Glass H. Tanaka;T. Yazawa;K. Eguchi
  18. The Chemistry of Silica R.H. Her
  19. Catalysis v.Ⅱ Reaction Rates and Selectivity in Catalyst Pores A. Wheeler;P.H. Emmett(ed.)