Strontium Titanate Substrate is a substrate material with excellent physical, electrical and chemical properties, a lattice constant of about 3.905 Å, and a dielectric constant of 300, which is commonly used in the fields of high-temperature superconductivity, semiconductor device manufacturing, and optical device preparation.
Characteristics
Crystal structure: cubic crystal system, chalcogenide structure.
Lattice constant: about 3.905 Å.
Density: approx. 5.11-5.12 g/cm³.
Hardness: 6-6.5 on the Mohs hardness scale.
Melting point: 2080 °C.
Coefficient of thermal expansion: 10.3 µm/m-°C (20.0 °C).
Dielectric constant: 300.
Dielectric loss: 0.020.
Refractive index: 2.4 (wavelength 0.4-0.5).
Transmittance: ≥70% between 1-4μ wavelengths.
Chemical stability: insoluble in water at room temperature and pressure.
Applications
Electronic device field:
Superconducting devices: Strontium titanate substrates can be used to grow superconducting thin films, such as Tsinghua University, Department of Physics, Associate Professor Li Wei and Academician Qikun Xue et al. Controlled growth of nanoscale lead islands on strontium titanate substrates, found that the superconducting energy gap of the lead islands significantly increased, providing valuable information for the study of nanoscale superconducting materials. In addition, the combination of monolayer iron selenide and strontium titanate substrate to produce interfacial high-temperature superconductivity has also demonstrated its important application value in the field of high-temperature superconductivity.
Microwave devices: Due to its high dielectric constant, low loss tangent and tunability of the dielectric constant in the RF range, strontium titanate thin films are widely used in the preparation of tunable high temperature superconducting microwave filters and other microwave devices, which can realize the efficient processing and precise regulation of microwave signals.
Voltage-controlled devices: Strontium titanate is a material with potential ferroelectricity, and its physical and electrical properties make it an ideal candidate for the manufacture of varactor diodes, voltage-controlled oscillators and other voltage-controlled electronic components, which play an important role in the field of communications, radar and other fields.
In the field of quantum computing, Prof. Jian Wang’s team at the Center for Quantum Materials Science, School of Physics, Peking University has successfully prepared a large-scale, high-quality single-layer FeTeSe high-temperature superconducting film on strontium titanate substrate, and discovered a one-dimensional atomic chain defect formed by the absence of the uppermost Te/Se atoms on the surface of the film, and observed zero-energy bound states at both ends of the defect at the same time, which offers a possible way for the realization of the topological quantum bit for further application.
The discovery of a one-dimensional atomic chain defect on the surface of the thin film, formed by the loss of the uppermost Te/Se atoms, and the simultaneous observation of zero-energy bound states at both ends of the defect provide a possible solution for the further realization of topological quantum bits that can be applied to advance the development of quantum computation.
Optical field :
Optical window materials: strontium titanate crystals with high refractive index and good optical transmittance have applications in special optical windows, which can be used to manufacture optical components with strict requirements on optical properties, such as high-precision optical instruments and optical windows in optical communication equipment.
Artificial gemstones: Its high refractive index makes it have the optical effect similar to gemstones in appearance, and it can be used in the manufacture of artificial gemstones.
Materials science research field: Strontium titanate substrate can be used as a template or support material for growing and researching thin films or nanostructures of other new materials, exploring new physical phenomena and material properties, and providing an important platform for basic research in materials science and the development of new materials. For example, researchers can grow thin films of two-dimensional materials on strontium titanate substrates to study their electronic structures and optical properties, laying the foundation for the development of new two-dimensional material devices.
Information transmission field: Peng Gao’s group at the School of Physics, Peking University discovered a two-dimensional antiferroic aberrant phase of strontium titanate at room temperature. The thickness of this room-temperature antiferroic aberrant phase along the plane of the grain boundaries is only about 6 cells, while the other two directions are centimeter-sized, and therefore it is expected to be prepared as a two-dimensional optoelectronic conductive channel, which is potentially valuable for application in the field of information transmission.
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Every batch of our materials is independently tested, and, if necessary, we send samples to certified companies for testing. We provide these documents and analysis certificates with the shipment to certify that our products meet the required standards.
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