Process for the synthesis of a composite material with ceramic cordierite content using sol-gel method

摘要

The Invention relates to Science and Technology of New Materials Ceramic and Metallurgy (Hydro and pyrometallurgical) and can be used in the factories which produce Ceramic Body and / or in factories for Synthesis of Metal Powders.This procedure provides a non conventional method of Synthesis of a composite Ceramic cordierite spinel Glass composition at a Lower temperature than usual, using as starting material Kaolin activated.Kaolin activated is treated with Concentrated sulfuric acid to obtain a saturated solution of Aluminium sulfate which is mixed with Magnesium, a Precursor to the formation of a Gel (pH = 4 - 1) 9.The Solid residue from the Kaolin treatment is leached with dilute NaOH solution to obtain a stable solution of sodium silicate, which when mixed with Gel (1) produces trasnformaciones until the formation of a Gel (2) At pH = 9 - 12. The gel (2) (2mgo.2al2o3 cordierite stechiometry.5sio2), it is Tu00c9RMICAMENTE 1100 - 1300sc during 2 - 4 h to obtain a Ceramic Powder with 70% of 10 - 20% of cordierite and spinel are characterized by being Refractory, shock resistant and low Thermal Conductive Heat.