SrTiO3 Crystal (Strontium Titanate)

Crystals >>> Superconductive Substrate >>> SrTiO3 Crystal

Strontium Titanate or SrTiO3 single crystal provides a good lattice match to most materials with Perovskite structure. At room temperature it exists in thew cubic form, but transforms into the tetragonal structure at temperatures less than 105K.  At very low temperatures, SrTiO3 exhibits piezoelectric and superconducting characteristics.  It also exhibits a very large dielectric constant.

SrTiO3 is an excellent substrate for epitaxial growth of HTS and many oxide thin films. SrTiO3 single crystal has also been used widely for special optical windows and as high quality sputtering target.

Red Optronics also supply Nb doped SrTiO3 single crystal.  Nb:SrTiO3 has similar structure to pure SrTiO3 but it is electrical conductive. Resistance of Nb:SrTiO3 varies from 0.1-0.001Ω-cm with Nb doping 0.010.001wt%. 

Physical Properties:  
Crystal Structure  Cube a=3.905A 
Growth Method Flare
Density 5.175g/cm3 
Melt point  2080C 
Hardness  6Mohn 
Thermal expansion 10.410-6/C
Dielectric constant  300 
Zoss Tangent at 10GHZ  510-4@300k 310-4@>>k 
Color and Appearance  Light brown under the light 
Chemical stability  Undissolvable in water

 

Nb:SrTiO3 grade  B C  D
Nb dopant(wt%) 1.0  0.7 0.4 0.10
Resistance rate (ohm-cm) 0.0035  0.0070  0.05 0.08 
Mobility (cm2/vs) 9.0 8.5 8.5 6.5

 

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