EFG sapphire tubes rods large length dimension up to 1500mm High temperature resistance

Short Description:

EFG stands for Edge-Defined Film-Fed Growth, which is a specific method for growing sapphire crystals. EFG sapphire tubes are produced using this technique.

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EFG sapphire tubes Characteristics

High purity: Sapphire tubes grown by the guided mold method have a high degree of purity and lattice structural integrity, providing better optical properties.

Large size: The mold-guided method can be used to prepare sapphire tubes with larger diameters, which is suitable for optical windows and optical components that require larger sizes.

Self-fusion properties: The bottom of the grown sapphire tubes can self-fuse to form a monolithic structure with better mechanical strength and stability.

EFG sapphire tubes Production technology

Preparation Raw Material: High purity aluminum oxide (Al2O3) is usually used as the growth raw material.

Filler and power: Add appropriate amount of filler to control the crystallization rate, melt and mix the raw materials by heating, and keep the temperature constant under suitable power.

Crystallization Growth: Seed sapphire is placed on the melt surface and sapphire growth is achieved by gradually lifting and rotating the crystals.

Controlled Cooling Rate: The cooling rate is controlled to prevent stresses from building up, resulting in high quality sapphire tubes.

EFG sapphire tubes Uses

Sapphire tubes grown by the guided mold method can be used in a variety of applications similar to the drawn method, for example:

Optical windows: Used as transparent windows for optical systems, especially in harsh environments such as high temperatures and chemical corrosion.

LED lighting: sapphire tubes are used as packages for high power LED lighting devices, providing protection and light guiding.

Laser systems: Used as laser resonator cavities and laser media for applications such as lasers, laser processing and scientific research.

Optical Sensors: Utilizing the excellent transparency and abrasion resistance of sapphire tubes can be used as windows for optical sensors, which are widely used in the fields of machinery, automobiles and aviation.

Please also note that specific applications and characteristics may vary depending on material preparation, process parameters and product design.