High Alumina Ball
Classification:
Keyword:
- Product Description
-
High-grade alumina ceramic balls are a type of inert ceramic filler made from industrial alumina (α-Al₂O₃) as the main raw material and obtained through high-temperature (usually above 1600℃) calcination. They possess extremely high chemical stability and mechanical strength. The content of alumina (Al₂O₃) in them is typically above 90%, and can even reach 99% or 99.5%, making them the most superior type of ceramic balls in terms of performance.
Key Features:
Ultra-Pure Composition: 92-99.5% Al₂O₃ with near-zero porosity for unmatched chemical/thermal stability.
Thermal Performance: Withstands 1,750°C (99.5% grade) and thermal shocks (ΔT>500°C).
Mechanical Strength: >10,000 N/cm² crush strength (10mm balls), Mohs 9 hardness.
Chemical Stability: Resists acids (except HF), alkalis (pH 14), and organic solvents.Application fields:
1. Petrochemical and coal chemical industries under harsh conditions: As a catalyst support/covering material, used in high-temperature, high-pressure, and highly corrosive environments.
2. Advanced environmental protection and metallurgy: As a high-performance heat storage material, used for extreme waste heat recovery.
3. Industries with high purity requirements: As a protective filler and supporting material, ensuring product purity.
4. Other special fields
High-purity grinding media: Used for ultra-fine and pollution-free grinding in electronic ceramics, high-end pigments, etc. High-temperature insulation packing material: Filled in specific areas of the high-temperature and high-pressure reactor.
offerings
95% High Aluminum Porcelain Balls
color
white
geometry
ball-shaped
sizes
Minimum content (%)
Maximum content (%)
Common content (%)
chemical composition
Al2O3
95
97
95.8
SiO2
/
4
2
Fe2O3
/
0.3
0.02
TIO2
/
0.1
0.02
CaO
/
4
1.5
MgO
/
0.1
0.05
Na2O
/
0.25
0.1
K2O
/
0.2
0.13
physical property
Free iron (%)
≤0.01
Porosity (%)
<7.0
Water absorption (%)
<4.0
Acid resistance (%)
>99.8
Alkali resistance (%)
≥90
Bulk density (g/cm3)
1.9
Specific gravity (kg/m3)
3200
Mohs hardness (grade)
>8.0
Thermal conductivity (w/m2.k)
0.7-0.8
Specific heat capacity (J/kg.°C)
628-837
Maximum operating temperature (°C)
1550
Thermal expansion (%) (500°C)
0.1
Thermal shock stability (500°C to cold water)
10 times
Geometric properties
Specification(mm)
3
6
10
13
16
19
25
38
50
Minimum compressive strength (N/PC)
510
1030
1961
6031
7650
14896
15288
17946
22065
Product inquiry
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