SrTiO3 STO Strontium Titanate Crystal Substrates
SrTiO3 (STO) Strontium Titanate Crystal Substrates
CAS Number: 12060-59-2; EC Number: 235-044-1
SrTiO3 single crystal has its lattice parameters match most materials with a Perovskite crystal structure, and therefore it is a popular crystal substrate for epitaxial growth of many oxide thin films. It is commonly used as substrate material for superconductor thin films, because Strontium Titanate (SrTiO3) and Y-Ba-Cu-O system (a = 3.89 A) have similar values in the lattice constant.
Both standard and custom-made Strontium Titanate crystal substrates are available from MSE Supplies.
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Main Physical Properties of Strontium Titanate Crystal Substrates
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Crystal structure
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Cubic, Perovskite
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| Molar mass (g/mol) | 183.49 |
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Growth method
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Vernue (flame) method
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| Purity (%) | >99.9% |
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Lattice constant
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a = 3.905 A
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Melting point (°C)
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2080
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Density (g/cm3)
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5.11
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Hardness
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6-6.5 Mohs
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| Refractive index | 2.394 |
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Thermal expansion coefficient (/K)
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9.4 x 10-6
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Dielectric constants
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300 at room temperature
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Chemical stability
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Insoluble in water
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Loss Tangent at 10 GHz
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~5x10-4 @ 300K , ~3 x10-4 @77K
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Sizes
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5x5 mm, 5x10 mm, 10x10 mm, 20x20 mm, or special sizes and orientations are available upon request
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Thickness
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0.5mm, 1.0mm
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Size tolerances
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+/- 0.1mm
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Thickness tolerances
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+/- 0.015mm
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Polishing
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Single side polished (SSP) or double side polished (DSP), Epi-ready surface Ra < 0.5 nm
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Orientation precision
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+/-0.5 degree
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Crystal orientation
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(100), (110), (111)
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Package
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Packed in class 100 grade plastic bag in class 1000 clean room
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