Sapphire (also known as white sapphire, molecular formula Al2O3) single crystal is an excellent multifunctional material. It has the characteristics of high temperature resistance, good thermal conductivity, high hardness, good infrared transmittance, and good chemical stability. It is widely used in many fields such as industry and scientific research (such as high-temperature infrared windows, etc.). At the same time, it is also a widely used single crystal substrate material and the preferred material for blue, purple and white light-emitting diodes (LED) and blue laser (LD) industries. It is also an important superconducting film substrate. In addition to preparing high-temperature superconducting films such as Y series and La series, it can also be used to grow new and practical MgB2 superconducting films.
Sapphire substrate is the main epitaxial substrate material for GaN blue LEDs and is also used in ultra-high-speed integrated circuits RFIC, resonators, SOS chips, optical communication chips, etc.
Al2O3 (aluminum oxide) single crystal is an important engineering ceramic material with the following performance characteristics: High temperature performance: Al2O3 single crystal has a high melting point (about 2072°C) and can maintain good performance in high temperature environment. Good mechanical properties: Al2O3 single crystal has high hardness, high strength and high toughness, and can withstand high loads and high stresses. Good corrosion resistance: Al2O3 single crystal has excellent chemical stability and can resist the erosion of many acidic and alkaline media. Good insulation performance: Al2O3 single crystal is an excellent insulating material that can withstand high voltage and high electric field. Based on the above properties, Al2O3 single crystal has been widely used in many fields, including: Aerospace field: Al2O3 single crystal can be used to manufacture high-temperature structural parts such as engine parts, combustion chambers, turbine blades, etc. Electronic field: Al2O3 single cry.
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