Al2O3
Al2O3 also known as white sapphire, is an excellent multifunctional material. Sapphire has good thermal properties, excellent electrical properties and dielectric properties. It not only prevents chemical corrosion, but also has the advantages of high temperature resistance, good heat conduction, high hardness, infrared transmission, and chemical stability. It is the preferred substrate for blue, violet and white light emitting diodes (LED) and blue laser (LD) industries (gallium nitride thin film needs to be epitaxed on the substrate). In addition, high-temperature superconducting thin films such as Y-system and La system and new practical MgB2 superconducting thin films can also be produced.
| Performance and parameters | |||
| Growth method | Hot cross method | ||
| Crystal Structure | Six Parties | ||
| Lattice Constant | a = 4.748 Å c = 12.97 Å | ||
| Purity | 99.99% | ||
| Color and appearance | Pure alumina crystal is transparent and colorless. Different color developing element ions penetrate the growing sapphire, which will make it appear different colors. | ||
| Density | 3.98 g/cm3 | ||
| Melting Point | 2040 ℃ | ||
| Mohs Hardness | 9mohs | ||
| Crystallographic Orientation | A-plane | <11-20> | 2.379 Å |
| R-plane | <1-102> | 1.740 Å | |
| M-plane | <10-10> | 1.375 Å | |
| C-plane | <0001> | 2.165 Å | |
| Redirection Precision | ±0.5° | ||
| Redirection the edge | ±1° | ||
| Size (special size can be customized according to customer needs) | 10×10x0.5mm、10×5x0.5mm、5×5x0.5mm | ||
| Polishing | Single or double side | ||
| Surface Roughness | ＜5 Å | ||
| Packing | Class 1000 super clean room Class 100 super clean bag or single chip crystal box package | ||
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