Product Positioning and Core Role
As a key functional filler in the manufacturing of composite insulators, aluminium hydroxide (Al(OH)₃) enhances the electrical insulation, flame retardancy and mechanical strength of insulators through the synergistic effect of physical filling and chemical properties. It is one of the core materials for the anti-aging and weather resistance of outdoor power transmission and transformation equipment.
Aluminum hydroxide Product Features and Technical Advantages
Aluminum hydroxide Appearance and form
Pure white fine powder, with controllable particle size (usually 5-20μm), uniform powder without lumps, which is convenient for uniform mixing with base materials such as silicone rubber. It has moderate hardness. After filling, it can improve the mechanical strength and aging resistance of insulators. Meanwhile, its density is relatively low, reducing the overall weight.
01
Aluminum hydroxide Excellent electrical performance
Aluminum hydroxide features high insulation resistance (≥10¹⁴Ω) and low dielectric constant (2.4-2.6), which can effectively suppress arc breakdown and enhance the insulator's resistance to leakage tracking in damp and dirty environments.
02
Aluminum hydroxide Flame retardancy and high-temperature resistance
When decomposing at 220-350℃, it releases crystalline water, absorbs heat and dilutes flammable gases. The flame retardant grade can reach UL94 V-0, meeting the fire protection requirements of outdoor high-voltage equipment.
03
Mechanical and weather resistance performance enhancement
After filling, it can enhance the tensile strength (by 10%-15%) and tear strength of the silicone rubber matrix. At the same time, it is resistant to ultraviolet rays and ozone aging, and can adapt to extreme temperature environments ranging from -40℃ to +120℃.
04
Environmental protection and compatibility
It is non-metallic materials, non-toxic and harmless,It has excellent chemical compatibility with substrates such as silicone rubber and epoxy resin, and there is no risk of precipitation or cracking during long-term use.
05
Technical Index
Chemical Formula : Al(OH)3
CAS NO. 21645-51-2
EINECS: 244-492-7
General Properties
|
molecular weight |
78 |
Mohs hardness |
3 |
|
Density g/cm3 |
2.4 |
Ratio of refraction |
1.58 |
Physical and Chemical Properties
|
Model Item |
ATHX-1 |
ATHX-1S |
ATH-3 |
ATH-5 |
|
Al(OH)3 [%] ≥ |
99.5 |
99.5 |
99.5 |
99.5 |
|
Al2O3 [%] ≥ |
64.5 |
64.5 |
64.5 |
64.5 |
|
SiO2 [%] ≤ |
0.02 |
0.02 |
0.02 |
0.02 |
|
Fe2O3 [%] ≤ |
0.01 |
0.01 |
0.01 |
0.01 |
|
Na2O [%] ≤ |
0.30 |
0.30 |
0.30 |
0.30 |
|
L.O.I ≤ |
35 |
35 |
35 |
35 |
|
Attached water ≤ |
0.4 |
0.3 |
0.4 |
0.3 |
|
+325 mesh 325≤ |
0.01 |
0.01 |
0.01 |
0.01 |
|
oil absorption ≈ |
32 |
31 |
32 |
31 |
|
Mean particle diamete(D50) µ m ≈ |
2.5 |
2.5 |
3.5 |
5 |
|
Whiteness [R457] ≥ |
95 |
95 |
95 |
95 |
|
PH value ≈ |
9 |
9 |
9 |
9 |
The Application Scenarios Of Aluminum Hydroxide For Composite Insulator
Application fields
10kV-1000kV high-voltage composite insulators (suspension, post, cross arm, etc.), insulators for rail transit, insulating components for wind power equipment.
Process adaptation
Suitable for extrusion molding, compression molding and other processes. The recommended addition amount is 30%-50% (by weight) of the base material, which can be adjusted according to mechanical strength requirements.
Packing
Packed in moisture-proof paper bags or plastic woven bags and lined with polyethylene film bags inside to prevent moisture or impurities from mixing in during transportation.
Some high-purity or special-specification products may be packed in sealed steel drums or vacuum-packed to further ensure the stability of product performance.
Packaging Specifications
The common packaging specifications are 25kg per bag or ton bags (1000kg per bag), which are convenient for loading, unloading and transportation. Customized packaging can also be provided according to customer requirements.
Transportation Precautions
The transportation vehicle should be kept dry and clean, and avoid being mixed with corrosive substances such as water, acids and alkalis to prevent the products from getting damp or undergoing chemical reactions.
Shelf Life Management
Aluminum hydroxide itself has relatively stable chemical properties, but long-term exposure to moisture will still affect its performance. Generally, it is recommended to store it for no more than 12 months. When using it, follow the "first in, first out" principle to ensure the freshness of the product.
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