Sol- Gel Technology

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 gt 400 C -H2O -Stabilizer
Porous Oxide
5
For example
Sol
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
6
Preparation of thin films

• RO3Si-OR H2O
• (RO)3Si-O-Si R-OH (Hydrolyses)
• (RO)3Si-OH(RO)3Si-OR
• (RO)3Si-OSi(RO)3 ROH
• (RO)3Si-OHHO-Si(RO)3
• (RO)3Si-O-Si(RO)3H2O

7

• Thank you for attention!