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sapphire material

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AL2O2 material

 

Sapphire(Al2O3) is consists of 3 oxygen atoms and 2 aluminium atoms by covalent bond, it is hexagonal lattice structure. Sapphire possesses unique properties of excellent optical, mechanical, chemical stability with high intensity, high hardness.
It is able to work under the temperature of 2000 centigrade, which is applied in infrared military devices, high intensity laser lens and photo-mask material. The unique lattice structure, mechanical and thermal property makes sapphire the major material for photoelectric devices. Usually, sapphire substrate is used for growing GaN based material and device epitaxial layer. Sapphire substrate has several advantages, first, growth technology is mature, device performs well, second, high stability enables the use under high-temperature growth, at last, it can be processed and cleaned easily because of its high mechanical intensity, which is the reason why it is applied as substrate in many process.

Properties of sapphire crystal

Contents

 High purity alumina is the main raw material for LED phosphor powder production. High purity alumina massive produced by our company is featured with high purity, good dispersion, centralized particle size distribution, excellent crystalline grain appearance as well as stable physical & chemical properties which guaranteed the high qualify of LED phosphor powder with good brightness, narrow particle size and super crystalline grain appearance.

 

High Purity Alumina for LED Phosphor Powder

Model

RB-Y-1

Crystaltype

α

Appearance

white powder

Purity

≥99.99

Na

≤0.0010

Fe

≤0.0006

Ca

≤0.0002

Si

≤0.0020

Cu

≤0.0001

Mg

≤0.0002

Ti

<0.0001

Cr

≤0.0001

Zn

≤0.0002

Pb

<0.0001

Mn

≤0.0001

Ni

≤0.0002

D50

5.0-6.0μm

BET

4.0-6.0m2/g

Loose Density

0.3-0.6g/cm3

Water Content

≤0.5%

Note: Product physical properties are adjustable at customer’s request.

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LBS002

LBS011

sapphire004

20140620_141431

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