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High-purity alumina product series
- Description
- Specifications
- Physical Properties
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Product Introduction – Aluminum Oxide for Diaphragm Coating
Lithium‑ion battery separators are typically made of polyolefins, which provide adequate mechanical properties at room temperature. However, at elevated temperatures, they are prone to significant thermal shrinkage, potentially causing a short circuit between the positive and negative electrodes and leading to spontaneous combustion or even explosion.
Coating an organic separator with aluminum oxide can significantly enhance its high-temperature resistance, thereby improving the safety of lithium batteries. Meanwhile, the ceramic coating also boosts the separator’s liquid‑retention capability and reinforces its mechanical properties.There are two general‑purpose alumina grades for diaphragm coating: ZK2230 and ZK233C; custom formulations are available to meet specific customer requirements.
Characteristics of alumina products for diaphragm coating:- High product purity; regular, smooth morphology with no sharp edges.
- The particle size distribution is narrow.
- Excellent dispersibility, stable suspension of the prepared slurry, and consistent product quality.
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Aluminum oxide ZK2230 for diaphragm coating
Technical Specification for Aluminum Oxide Used in Lithium-Ion Battery Coating
Molecular formula: Al₂O₃
Molecular weight: 102
Technical indicators:
Project
ZK2230
Testing method instrument
Appearance White powder Visual inspection Crystal form Alpha phase XRD Median particle size, µm 0.50~1.0 Specific surface area, m²/g 4.0~8.0 Specific surface area analyzer Moisture, ppm ≤ 3500 Moisture meter pH 6.0~10.0 pH meter Purity, % ≥ 99.9 ICP Trace element content, ≤ ppm Sodium 800 ICP Iron 100 Silicon 100 Copper 20 Chromium 20 
Aluminum oxide zk233C for diaphragm coating
Technical Specification for Aluminum Oxide Used in Lithium-Ion Battery Coating
Molecular formula: Al₂O₃
Molecular weight: 102
Technical indicators:
Project
Technical indicators
ZK223C
Testing method instrument
Appearance - White powder Visual inspection Crystal form - Alpha phase XRD Median particle size, µm - 0.50~1.0 Laser particle size analyzer Specific surface area, m²/g - 4.0~8.0 Specific surface area analyzer Moisture, ppm ≤ - 3500 Moisture meter pH - 6.0~10.0 pH meter Purity, % ≥ - 99.9 ICP Trace element content, ≤ ppm Sodium 800 ICP Iron 100 Silicon 100 Copper 20 Chromium 20 
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