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KTaO3 (Potassium Tantalate) Crystal and Substrate

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Materials KTaO3 crystals Orientation <100>  <110>  <111>
Orientation Error ±0.5deg Typical Size (mm) 10x3, 10x5, 10x10, 15x15, 20x15, 20x20
Typical Thickness 0.5mm, 1.0mm Thickness Tolerance ±0.05mm
Size Tolerance ±0.1mm Surface Finish SSP (single surface polished) or
DSP (double surface polished)
Roughness Ra<0.5nm

Basic Properties:

Formula KTaO3 Growth Method Czochralski method
Point Group m3m Cell Parameters 0.3984nm
Melting Point 1352.2 ℃ Density 7.025 g/cm3
Mohs Hardness Refractive Index 2.226@633nm,  2.152@1539nm
Coefficient of Thermal Expansion 4.027 x 10-6/K Specific Heat (Temperature J/(Kg) 0.378
Transparent Hands (nm) 380~4000

Potassium tantalate (or KTaO3) single crystal has a stable cubic structure, KTaO3 crystals can be used to make the laser modulators and semiconductor components. KTaO3 crystals has no phase transition from absolute zero to its melting point (1645K), it’s crystal cell has a good match to YBCO system superconductors.