Lead-Zirconate-Titanate Powder Preparation
Hydrothermal Method: In the first stage zirconia/titania mixed gel is prepared from the solutions of ZrOCl2 and TiCl4 by mixing ammonia solution. The prepared solution contains high concentration of ZrOCl2 and TiCl4. In this a 10% excess of PbO and a mineralizer of alkali halides and hydroxides are added.
The mixture is hydrothermally treated at about 300.C under a pressure of 7 to 8 MPa in a auto clave. After hydrothermal reaction the product is cooled and washed with 10% acetic acid solution and finally washed to get neutral ph. The particles produced is of very pure and having very high surface area with sub micron size.
To be contd….
