HYDROTHERMAL SYNTHESIS OF FIBROUS LEAD TITANATE POWDER

A fibrous lead titanate (PbTiO3) powder with light-yellow color has been prepared by hydrothermal synthesis. The influence of Pb/Ti (0.3 to 1.0) ratio in the mixture and reaction time on the formation of fibrous PbTiO3 under hydrothermal conditions have been investigated. The preferable conditions for preparing fibrous perovskite-type PbTiO3 from fibrous potassium titanate are that Pb/Ti ratio is 1.0, reaction temperature is 150 degrees C, and time is 72h. The fibrous powder of perovskite-type is usually less than 2 mu m in diameter and more than 50 mu m in length. The morphology on the face of fibers is essentially unchanged up to 800 degrees C, but it changed after heating at 900 degrees C. But the fibrous morphology is unchanged at 1000 degrees C.