Alumina Powder for Polishing, Ceramics & Coatings
KOSNANO supplies alpha alumina powders optimized for battery thermal management, precision polishing, and advanced ceramics, with batch COA and sample support.
High purity alumina powder with controlled particle size for polishing, ceramic and industrial applications.
Purity up to 99.00%
D50 Particle Size Available
MOQ from 25kg
Fast Delivery
COA / TDS Available
Alumina Powder Manufacturer | High Purity Aluminum Oxide
Alumina powder
Nano alumina CAS#: 1344-28-1/Nano-aluminum oxide, molecular formula: Al2O3, molecular weight: 101.96
KOSNANO provides high-quality alumina powder in various particle sizes for advanced materials applications in China. Our factory offers nano-alumina powder with an annual production capacity of 1600 tons. Our main products include: gamma-phase nano-alumina, alpha-phase nano-alumina, wear-resistant hardening nano-alumina, transparent nano-alumina dispersions, alpha-phase nano-alumina dispersions, gamma-phase nano-alumina dispersions, and nano-alumina for lithium batteries, thermally conductive, wear-resistant, and scratch-resistant powders for coatings, 5N high-purity alumina, high-purity nano-alumina hydroxide, nano-alumina powder series, polishing powder/alumina polishing powder, nano-alumina liquid series, alumina sol, and powder coating anti-caking agents. Our products are widely used in coatings, air treatment, rubber, inks, plastics, cosmetics, and other fields.
| Item | Specification |
|---|---|
| Product | Nano Alumina Powder |
| Formula | Al₂O₃ |
| Purity | 99.00% |
| Particle Size | 20 nm – 500 nm |
| Crystal Phase | Alpha / Gamma |
| Appearance | White powder |
| Surface Area | Customizable |
| Applications | Coatings, Ceramics, Battery |
Available Crystal Phases
Alpha Alumina (α-Al₂O₃)
Higher hardness
Better thermal stability
Suitable for wear-resistant coatings and polishing base materials
Gamma Alumina (γ-Al₂O₃)
Higher surface area
Better dispersibility
Ideal for catalysts, coatings and functional additives
Expert alumina Manufacturer in China – KOSNANO
The KOSNANO production team is committed to providing customers with high-purity alumina powder and meeting their diverse application needs.
We employ advanced continuous precipitation and hydrothermal control technologies, combined with high-purity raw materials and intelligent process monitoring, to ensure all our products possess precise particle size, low agglomeration, and excellent redispersibility.
Furthermore, our multi-stage programmable calcination and crystal phase control enable us to reliably produce γ-phase and α-phase alumina, ideal for catalyst, ceramic, and polishing applications.
In addition, we use a low-sodium closed-loop system to maintain ultra-low impurities, reducing environmental impact and improving energy efficiency. We can provide alumina powder surface modification services, such as silane modification and organic treatment. Therefore, our nano-alumina can be directly used in plastic masterbatches, coatings, or battery systems without additional processing.
High purity, narrow particle size distribution, and excellent dispersibility—make KOSNANO your trusted nanomaterials partner.
Products Available & Specification
Related Products
Application
Nano alumina powder from KOSNANO is widely used in:
Functional coatings
Ceramic materials
Lithium battery separators
Thermal management fillers
Surface polishing base materials
Catalyst carriers
Key Features
Narrow particle size distribution / Low impurity levels /Stable batch consistency
High dispersibility /Custom particle size available
When selecting nano alumina powder, consider:
Particle size required
Surface area needs
Application environment
Dispersion system
KOSNANO supports customized solutions based on your process requirements.
Packaging / MOQ
MOQ: 1kg sample / 25kg bulk
Packaging: 1kg bottle / 25kg bag
Lead time: 7–10 days
Standards and Certifications
KOSNANO produces aluminum oxide that meet to the general standards and certifications, such as: ISO9001:2008，ISO14001:2004，OHSAS18001：
Package
1kg bottle / 20-25kg bag 20kg/barrel; 25kg/Bags; 850kg/Bags
Loading Ability:
With Pallet: 12mts/20ft, 24mts/40ft
Without Pallet: 17mts/20ft (8-15mesh), 20mts/20ft (20-40mesh), 24mts/ 20ft & 40ft
Looking for polishing-grade alumina
FAQ
Q1: What is nano alumina powder used for?
Nano alumina powder is commonly used as a functional material in coatings, ceramics, battery components, thermal fillers, and precision polishing systems. Because of its small particle size and high surface activity, it helps improve wear resistance, thermal stability, and mechanical strength in many advanced material applications.
Q2: What is the difference between alpha and gamma alumina?
The main difference lies in structure and performance.
Alpha alumina is harder and more stable, making it suitable for wear-resistant coatings, polishing bases, and structural ceramics.
Gamma alumina has a much higher surface area and better dispersibility, which makes it ideal for catalysts, coatings, and battery-related applications.
In short — alpha is stronger, gamma is more reactive.
Q3: What particle size do you offer?
We offer nano alumina powder across a wide particle size range, typically from about 20 nm up to submicron grades.
Different sizes are used for different purposes — smaller particles are better for coatings and catalysts, while larger nano grades are often used in ceramics, fillers, and polishing systems.
Custom particle size control is also available if your process requires it.
Q4: Is customization available?
Yes, customization is possible.
We can adjust particle size, surface area, and packaging based on your application needs — whether it’s for coatings, battery materials, ceramics, or polishing systems.
Many customers request tailored grades to match their formulation or process conditions.
Q5: Do you provide COA?
Yes, a Certificate of Analysis (COA) is available for every batch.
We test particle size, purity, and key quality indicators to ensure stable performance across shipments.
TDS and SDS documents are also available upon request.
Q6: What industries use nano alumina?
Nano alumina is widely used across multiple industries, including:
Functional coatings
Advanced ceramics
Lithium battery materials
Thermal interface fillers
Catalyst supports
Surface treatment and polishing
It is especially valued where durability and thermal stability are important.
Q7: Is it suitable for coatings?
Yes.
Nano alumina is often added to coatings to improve hardness, wear resistance, and heat resistance.
It also helps enhance surface durability in protective or functional coatings.
Q8: Is it suitable for batteries?
Yes.
Nano alumina is commonly used in lithium battery separator coatings and functional layers.
It helps improve thermal stability and safety performance in battery systems.
Q9: What is the MOQ?
For evaluation or lab trials, we usually support small quantities starting from sample level.
For bulk production, standard packaging such as 25kg bags is available.
MOQ can be discussed depending on project scale.
Q10: Do you ship globally?
Yes.
We regularly ship nano alumina powder to customers worldwide, including Asia, Europe, North America, and the Middle East.
Samples and bulk orders can be arranged by air or sea.