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   Product Description


Ultra Fine Alumina is a high-purity alumina powder produced through advanced refining and micronization processes. It features exceptional purity (99.9%–99.995%), low impurity content, sub-micron particle size, and excellent dispersibility.

The RB-X series includes RB-X-1, RB-X-2, and RB-X-3, distinguished by different purity levels to meet diversified application needs in electronic ceramics, polishing materials, refractories, catalysts, and advanced composites.

 

   Product Features


  • High purity: 99.9%–99.995% Al₂O₃

  • Extremely low impurities (Si, Fe, Na, Ca in ppm range)

  • Sub-micron particle size: D50 = 0.2–1 μm

  • Excellent chemical stability

  • Good dispersibility for wet and dry processes

  • BET surface area: 5–12 m²/g, suitable for ceramics and catalysts


   Technical Overview


Model

RB-X-1

RB-X-2

RB-X-3

Appearance

white powder


Element

Unit

Typical Valve

Purity

Al2O3

%

≥99.995

≥99.99

≥99.9

Si

ppm

≤5

≤20

≤300

Fe

ppm

≤1

≤5

≤100

Na

ppm

≤2

≤20

≤500

Mg

ppm

≤1

≤20

≤10

Ca

ppm

≤1

≤5

≤50

Cu

ppm

≤0.5

≤1

≤10

Ti

ppm

≤0.5

≤1

≤10

Cr

ppm

≤0.5

≤1

≤10

BET

m2/g

5~12

5.0~12

5.0~12

Moisture

%

≤1

≤1

≤2

LOI

%

≤0.5

≤0.5

≤0.5

D50

μm

0.2~1

0.2~1

0.2~1

Bulk density

g/cm3

0.3~0.6

0.3~0.6

0.3~0.6


   Applications


  • Electronic Ceramics: Insulating ceramics, ceramic substrates, precision structural ceramics

  • Polishing Materials: Optical glass polishing, metal finishing, CMP processes

  • Refractories: High-performance castables, alumina-based refractory additives

  • Functional Fillers: Coatings, inks, resins, thermal conductive composites

  • Catalysts & Carriers: Chemical catalysts, adsorbents, γ-Al₂O₃ carriers

  • Battery & Advanced Materials: Lithium-battery separator coatings, ceramic-coated materials


   FAQS


Q: Does it support customized production?

A: Yes, particle size distribution, packaging and special indicators can be adjusted according to needs.


Q: How to pack and ship?

A: Moisture-proof woven bags or ton bags;Sea/air transportation, DDP, FOB,CIF and other trade terms are available.


Q: Can you provide samples?

A: Free samples of 1-2kg will be sent out within 3 working days.


Q: Do you guarantee safe and secure delivery of products?

A: Yes, we always use high quality export packaging. We also use specialized hazard packing for dangerous goods and validated cold storage shippers for temperature sensitive items. Specialist packaging and non-standard packing requirements may incur an additional charge.



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