Product specifications for Altech's 4N HPA products

Units

POWDER

PELLETS/BEADS

Crystal structure

α

α

Purity

%

≥99.99%

≥99.99%

Particle size

μm

D50<0.5, D90<1, D100<3

-

Loose bulk density

g/cm3

0.3-0.5

2.0-2.2

Tapped bulk density

g/cm3

0.6-0.9

-

BET surface area

m2/g

3-6

0.1-0.6

Si

ppm

<20

<20

Fe

ppm

<10

<10

Na

ppm

<10

<10

Mg

ppm

<10

<10

Cu

ppm

<10

<10

Ca

ppm

<10

<10

Others

ppm

<30

<30

Packing – PE bag

20kg

20kg

Application

Coatings
(lithium-ion batteries)

Single crystal
(synthetic sapphire/LEDs)