Strontium Titanate (SrTiO3) Nanoparticles
Strontium titanate (SrTiO3) nanoparticles are regarded as incipient ferroelectric materials with their ferroelectricity being sustained at low temperature through quantum functions. They adopt a transitional state to non-ferroelectric property at lower temperatures and are known for their capability as resistive high temperature oxygen sensors. Strontium titanate are stable without being recrystallize within a wide range of temperatures from as low as 104K to 2300K. They accept high concentrations of dopants with no phase transition making them qualified sensors over a wide range of temperatures. Strontium titanate nanoparticles have found applications in sensitive oxygen sensors in car exhaust system and control and are considered to be the future high temperature oxygen sensors as well. Several methods have been suggested for the synthesis of strontium titanate nanoparticles amongst, sol-gel has appeared to be the most efficient preparation method for a broad range of applications. In addition to sol-gel strontium titanate nanoparticles have been prepared by physical and wet chemical methods such as pulsed laser vapor deposition too.