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  • Potassium Tantalate (KTaO3) Crystals and Substrates
  • Potassium Tantalate (KTaO3) Crystals and Substrates

Potassium Tantalate (KTaO3) Crystals and Substrates

  • Typical thickness 0.5/1.0mm
  • Surface Roughness: Ra < 0.5nm
  • Clean package: class 1000 clean room and class 100 bags
  • Orientation of KTaO3 substrates: ＜100＞, ＜110＞ and ＜111＞
  • Applications: ferroelectric devices, epitaxial thin film growth for perovskite materials, High Temperature Superconductor (HTSC) film growth, and semiconductors
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Specifications:

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 6  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 Wavelenth Range (nm) 380~4000

Potassium tantalate (or KTaO3) single crystal has a perovskite crystal structure, characterized by its cubic lattice arrangement of potassium, tantalum, and oxygen ions. This structure confers upon KTaO3 a series of intriguing properties including excellent ferroelectric properties, high dielectric constant, and low dielectric loss, transmittance to the VIS and NIR spectra, and high melting point. KTaO3 finds versatile applications as ferroelectric devices, substrates for epitaxial growth of thin films of other perovskite materials, such as complex oxides and high-temperature superconductors, or optical components.

The ferroelectric behavior of KTaO3 at low temperatures enables reversible polarization switching under an external electric field, a trait exploited in ferroelectric memory devices. In addition, KTaO3 possesses a wide transmission range spanning from ultraviolet to infrared wavelengths, making it suitable for optical applications. Its piezoelectric properties further extend its utilities in sensors, actuators, and acoustic devices.

Hangzhou Shalom EO offers KTaO3 crystals and wafers, the unique properties of our KTaO3 crystals and substrates render them indispensable in a diverse range of applications including high-performance capacitors, microwave devices, and ferroelectric memories, waveguides, substrates for epitaxial growth, etc.