ゾル-ゲル法を応用したセラミックスの封孔処理

抄録

Sealing treatment made by sol-gel process using a multi-component solution consisted of organic silicon compound and silica sol was applied to the ceramics for the filling of the pores and coating on the surface.
SEM observation, pore size distribution determination, solid ²⁹Si-NMR measurement, and the measurement of the air permeability of the ceramics were carried out on the samples before and after treatment in order to verify the effect of the sealing treatment.
Results showed that the sol introduced into the pores formed silica glass, filled them and coated on the surface, therefore improved the air tightness of the alumina ceramics.