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 Phase transition Sol Gel Drying

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

Gel 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 Drying in air Drying with H in 1200 C and 1atm Glass of Nanoparticles

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

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