Strontium Titanate ( SrTiO₃ ) – Properties and Applications

Background

Strontium titanate (SrTiO₃) has a perovskite structure like CaTiO₃, the mineral from which the name was derived. At room temperature it exists in thew cubic form, but transforms into the tetragonal structure at temperatures less than 105K.

At very low temperatures, strontium titanate exhibits piezoelectric and superconducting characteristics.

Strontium titanate also exhibits a very large dielectric constant.

Key Properties

Property	Value
Density (g/cm³)	5.12
Melting Point (°C)	2080
Mohs Hardness	6
Dielectric Constant	300
Thermal Conductivity (W/m.K)	12
Co-Efficient of Thermal Expansion (/°C)	9.4x10^-6
Refractive Index	2.31-2.38

Applications

Strontium titanate finds applications in varistors, while thin strontium titanate films are used in tunable HTS (high temperature superconducting) microwave filters.

Strontium Titanate ( SrTiO3 ) – Properties and Applications

Background

Key Properties

Applications

Strontium Titanate ( SrTiO₃ ) – Properties and Applications