4N Al2O3 for Battery separator coating
2. Specific surface area: 5–10 m²/g
3. Crystal form: α-phase
4. Particle size: 0.3-0.5 um
5. Product application: Battery separator coating
- Product Description
4N Al2O3 for Battery separator coating: 99.99% α-Phase Alumina, 0.3-0.5um
One of the options for that layer is 4N Al2O3 for Battery separator coating from Xi'an PUTAI Environmental Protection Co., Ltd. Lithium-ion separator producers add a ceramic layer to polyolefin film. It is α-phase alumina powder of 99.99 % purity, 0.3-0.5um particle size and 5–10 m2/g specific surface area. This page summarises those values, describes their relationship to coating operations, and provides basic handling advice for slurry preparation and storage. For data not listed here, such as impurity limitations, please contact us.
4N Al2O3 for Battery Separator Coating Specifications
The table below lists only the values supplied for 4N Al2O3 for Battery separator coating. No other parameters have been added.
| Parameter | Specification |
|---|---|
| Product Name | 4N Al2O3 (high-purity alumina) |
| Purity | 99.99% |
| Specific Surface Area | 5–10 m²/g |
| Crystal Form | α-phase |
| Particle Size | 0.3-0.5um |
Parameters not listed above, such as individual impurity limits, packaging, minimum order quantity and lead time, are not specified on this page. Please request them by email.
Why Purity Matters in Separator Coatings?
Purity is a reasonable initial screening criteria for any alumina utilised on a separator. Metal impurities may help internal short circuits of a cell, hence minimal impurity level is usually chosen. This product is advertised as 99.99%.
Individual impurities limitations are not shown on this page. If your cell design has restrictions on certain parts please submit them to us and we will check against this grade.
Particle Size and Specific Surface Area in the Slurry
You want to compare the two numbers with your binder and solvent system . Particle size 0.3-0.5um . Specific surface area 5-10 m^2/g . Fine powders have high surface energy and Van der Waals attraction may cause ordinary atoms to cluster together. Keep this in mind while designing your dispersion step.
Your slurry behaviour and coating uniformity will rely on your recipe and procedure. Check this out in your own experiments.
α-Phase Crystal Form
α-alumina is the thermodynamic stable crystalline form of alumina and is the phase of this product. A stable ceramic phase is helpful in a separator coating since the layer is subjected to heat during cell operation and abuse conditions.
Other phases such as gamma alumina are separate substances with different characteristics. These are not discussed on this page.
Application in Lithium-Ion Battery Ceramic Separators
4N Al2O3 for Battery separator coating is designed for use as the ceramic coating on polyolefin separators in lithium-ion batteries. The heat resistance of the separator is improved by applying ceramic coatings.
The exact outcome relies on the coating formula, layer thickness and method, none of which are specified on this site. Test your final separator for ion transport and thermal shutdown behaviour.
Slurry Dispersion and Handling Guidance
Below are general practice notes for fine alumina powders. This is not test data for this product.
- Dispersion: High shear equipment such as bead mills are often employed. Surface modifiers such as silanes or surfactants must be compatible with your solvent system.
- Moisture: Alumina powder is hygroscopic and may cake in humid environments. If stored for a long time, the moisture content of the material may be checked before use using a Loss on Ignition (LOI) test.
- Particle size check: Transmission electron microscopy (TEM) may be used to verify whether the particles are still about 500 nm following dispersion or have formed bigger clusters.
Purchasing Considerations
Consider the four variables cited above: 99.99% purity, 5-10 m2/g surface area, α-phase crystal shape and 0.3-0.5um particle size. Check each against your coating formulation. Please clarify supplies specifics with our staff - amount of order, package type and delivery timetable since these data are not included on this site.
When asking about the product, please provide your desired requirements, any impurity limitations and your slurry system. This allows us to see your requirements versus the values stated.
About Xi'an PUTAI Environmental Protection Co., Ltd.
PUTAI Group was founded in August 2008 and has been listed under the stock symbol 839410 since November 2016. Its main business includes R&D, manufacturing, sales and comprehensive services of wastewater treatment chemicals and drinking water purification chemicals.
On this site no distinct company statistics for alumina production is given. Please let us know if you need any more information for supplier qualification.
FAQ
Q: What values are specified for the product?
A: 99.99% Purity 5–10 m²/g Specific surface area α-phase Crystal shape 500 nm Particle size Other values are not included on this page.
Q: Why does the powder aggregate?
A: Van der Waals attraction between tiny particles is caused by high surface energy. A popular approach to achieve improved dispersion is to utilise an appropriate silane or surfactant and high-shear equipment.
Q: Why is purity important?
A: Internal short circuit caused by metallic contaminants. At the material level, higher purity reduces that danger
Q: How do you check for moisture after lengthy storage?
A: A Loss on Ignition ( LOI ) test may be performed to verify moisture content prior powder usage.
Q: How can I determine particle size after dispersion?
A: Transmission Electron Microscopy (TEM) can tell whether the particles still are about 500 nm or have agglomerated.
Contact Us
Email your target specifications and slurry system to sales@ywputai.com to request details on 4N Al2O3 for Battery separator coating.
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