Alumina raw materials & powders

Our alumina powder have several very required physical properties for industrial applications such as plasma spraying, cosmetic, etc.
Discover the advantages of our technical Microbeads :

Thanks to its integrated alumina powder production and its Flame fusion method, RSA is in a position to offer a wide range of dense high pure raw materials and high pure alumina powders.

Alumina Powders

Various productions of high pure alumina powders and customized doped alumina powders for crystal growth applications, vapour coatings applications, plasma applications…
(on demand alpha, gamma, and customized specific surfaces).

Alumina Microbeads

A wide range of High –tech applications : thanks to its physical and chemical characteristics, the RSA Microbeads are becoming a successful solid and technical additive.

Main advantages :

resistance to corrosion and chemical agents
higher abrasion and scratch resistance
resistance to fissuring and cracking
uniform surface improvement
no alteration of initial colouring

Specific luminescent applications by doping with :

Transition elements (Cr, Ti, Ni, Fe…)
Lanthanids (Nd, Ho, Yb, Er…)

With a perfect spherical shape, these fused alumina particles have a high density and an excellent flow ability, which adds to well known properties of alumina : high hardness, good electrical insulation and permittivity, chemical inertia…

All these characteristics have been tested successfully in : ceramics, composites materials, specific refractory materials composition, thermocouples insulation…

RSA Optronics Microbeads…success of crystal growth

Besides Verneuil crackles widely used as raw material for crystal growth, RSA proposes its High pure Optronics Microbeads alternative for static and continuous feeding systems for crucible charge in bulk crystal growth.

The chemical quality of the product is perfectly controlled, making it easier to directly fill the the crucibles used by all sapphire or laser crystal growing technologies : EFG, Kyropulos, Bagdasarov, CZ for YAG crystals…

Main properties

* Crystallography on demand : mixture of triclinic and
monoclinic phases or 100% alpha phase available on request.
* Shape : perfectly spherical and full dense.
* Mean diameter : 25 µm or 80 µm
* Density : apparent 2,3, taped 2,4
* Specific surface area : 0,08 m² / g
* Chemical purity : 99,998% Al 2O3 :

	Concentration	Element	Concentration	Element	Concentration
	( ppm wt )		( ppm wt )		( ppm wt )
Li	<0.05	Br	<0.1	Ho	<0.1
Be	<0.01	Rb	<0.01	Er	<0.1
B	<0.2	Sr	<0.05	Tm	<0.1
O	Matrix	Y	<0.01	Yb	<0.11
F	<0.5	Zr	<0.05	Lu	<0.1
Na	<7	Nb	<2	Hf	<0.1
Mg	<2	Mo	<1	Ta	Binder
Al	Matrix	Ru	<0.1	W	<0.2
Si	<8	Rh	<0.05	Re	<0.05
P	<0.3	Pd	<0.1	Os	<0.01
S	<0.3	Ag	<0.05	Ir	<0.01
Cl	<5	Cd	<0.1	Pt	<0.05
K	<0.5	In	<0.01	Au	<1
Ca	<0.5	Sn	<0.05	Hg	<0.1
Sc	<0.01	Sb	<0.05	Tl	<0.01
Ti	<1	Te	<0.05	Pb	<0.05
V	<0.2	I	<0.01	Bi	<0.01
Cr	<0.7	Cs	<0.05	Th	<0.005
Mn	<0.1	Ba	<0.1	U	<0.005
Fe	<5	La	<0.1
Co	<0.05	Ce	<0.1
Ni	<0.1	Pr	<0.1
Cu	<0.5	Nd	<0.1
Zn	<0.1	Sm	<0.1
Ga	<0.05	Eu	<0.1
Ge	<0.1	Gd	<0.1
As	<0.01	Tb	<0.1
Se	<0.1	Dy	<0.1

RSA Al2O3 crackles and Split boules

Thanks to its Flame fusion process RSA offers for years highest purity of crackles and verneuil boules dedicated to crystal growth as feeding raw materials and to other major activities requiring high pure and dense Al2O3.

From Ti-free products to specific shape grains we can offer on demand customized materials.

Customized specific Packaging

· Anti-moisture individual unit pack
· From 1 kg to 6 kg on demand
· High resistance plastic can
· Plug with water-tightness joint

· Carton box
· Two cans per box
· Dimensions : 40 x 30 x 20 mm

· Each carton box contains data with lot reference, chemical specification, handling and packing operator references.

· Anti-moisture thermo-weld pack
· From 1 kg to 12,5 kg on demand