Alpha Alumina Powders for Sapphire

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Shanghai Yiming Materials Tech. Co., Ltd

86-21-33625009

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Alpha Alumina Powders for Sapphire


company	Shanghai Yiming Materials Tech. Co., Ltd
Categories	LED Displays
Update	2011-08-02
Original Region	China
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Alpha Alumina Powders for Sapphire

Alpha Alumina Powders for Sapphire (5N)

Sapphire crystal is an excellent all-purpose material: characterised by high-temperature resistibility, high thermal conductivity, infra-red transmittance and chemical stability, it is widely used in a variety of fields such as industry, military and research.

Sapphire, the single crystal substrate, is the preferred substrate for superconductor, LED, and LD (where it requires the GaN epifilm on the wafer). It is used in the production of the high-temperature super-conductor Y-line and La-line films, and in the new MgB₂ super conductor film as well.

The 5N alpha alumina powders are produced by our independent technology (hydrolysis of aluminum into aluminum hydroxide with cholineas catalyst). Given our strict control of raw materials and of the production process, this product boasts the advantages of high purity, high density, good batch stability and large batch. Our product is suitable for large-size sapphire manufacture by the Kyropoulos, Heat Exchanger, Bridgman and other methods.

Applications:

Mainly used in Sapphire growing, PDP fluorescence materials and high-performance materials in rubies and sapphires.

Technique Parameter

Purity		>99.999%
Block Volume Density>（g/cm³）		3.7
Impurity Content	Si < (ppm)	2.5
	Fe < (ppm)	1.0
	Mg < (ppm)	1.0
	Ca < (ppm)	1.0
	Pb < (ppm)	1.0
	Ti < (ppm)	0.5
	Na < (ppm)	1.0
	Cu < (ppm)	1.0

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