Ultrasound-assisted sol-gel synthesis of ZrO.

Synthesis of tetragonal ZrO by both conventional sol-gel and ultrasound-assisted sol-gel methods and using a non-ionic surfactant Tween-20, was performed. A porous microstructure composed of nanometric particles was observed. Tetragonal ZrO was obtained using a low heat treatment temperature of powders, 500°C by both methods.