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Sol- Gel Technology

Sol- Gel Technology. Aytan Muradova. Introduction. Hydrolyses Polymerization Growth of nanostructures Agglomeration. The prime requisite for obtaining good quality in this technology. Variation of PH Temperature Time Concentration of Reagent Concentration of Catalyzor H2O/Si

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Sol- Gel Technology

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  1. Sol- Gel Technology Aytan Muradova

  2. Introduction • Hydrolyses • Polymerization • Growth of nanostructures • Agglomeration

  3. The prime requisite for obtaining good quality in this technology • Variation of PH • Temperature • Time • Concentration of Reagent • Concentration of Catalyzor • H2O/Si • Phase transition Sol Gel • Drying

  4. Sol- Gel Processing RO Me or Me salt +H2O Stabilizer Nanodisperse Oxide Sol (Particulate or Polymeric) -H2O Gel -H2O Xerogel T > 400 C -H2O -Stabilizer Porous Oxide

  5. Sol For example aerosol Homogeneous mixture With diameter20-50nm Nitration with NaOH Drying Nitration with NH4OH Gel Annealing with 600- 1000 C Xerogel Adding (CuNO3)2 Dryingin air Drying with H in 1200 C and 1atm Glass of Nanoparticles

  6. Preparation of thin films • RO3=Si-OR + H2O (RO)3=Si-O-Si+ R-OH (Hydrolyses) • (RO)3=Si-OH+(RO)3=Si-OR (RO)3=Si-OSi=(RO)3+ ROH • (RO)3=Si-OH+HO-Si+(RO)3 (RO)3+Si-O-Si=(RO)3+H2O

  7. Thank you for attention!

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