Development of a precursor sol for the electric field assisted sol-gel deposition of yttrium silicate

作者：Grosse Brauckmann Jana^*; Lezniak Alicja; Argirusis Christos; Borchardt Guenter

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2010, 358(1-3): 28-34.

DOI：10.1016/j.colsurfa.2010.01.014

• Yttrium silicate
• Sol-gel
• Electrophoretic deposition
• Oxidation resistance

In this paper we present a synthesis route for an Y(2)SiO(5) sol derived from tetraethoxysilane and yttrium oxo-isopropoxide where the sot particles show a significant particle charge. The dynamic light scattering method was applied to obtain information on the relation between charging and growth of these sol species. The effect of water concentration, pH of the employed water and aging time on hydrolysis and condensation on the amount of charging and the growth mechanism of sol particles were investigated. Synthesis parameters were optimized to allow an electric field assisted deposition of the sot-get particles from low concentrated sols. Glassy carbon and carbon fibre reinforced carbon composites with a silicon/silicon carbide outer layer (C/C-SiC) were used as substrates for the deposition process.

• 出版日期2010-4-5