Product Description
Our company produces a full range of ceramic hollow balls, including alumina hollow balls, stabilized zirconia hollow balls, and related products. Alumina hollow ball is a high-temperature, energy-saving lightweight refractory material with outstanding thermal stability under oxidizing or reducing atmospheres.
It is especially suitable for high-temperature furnaces operating at 1600°C–2400°C.
Alumina hollow balls can be used as high-temperature and ultra-high-temperature insulation fillers, lightweight aggregates for refractory castables, and refractory concretes. They are also used in high-temperature energy-saving furnaces, such as inverted flame furnaces, nuclear reactors, molybdenum wire furnaces, tungsten rod furnaces, induction furnaces, and nitrogen furnaces.
⚡ Energy Savings
Energy savings can exceed 40%, making it an excellent energy-efficient refractory material
Typical Applications
- High-temperature insulation filler
- Lightweight refractory castables and concretes
- High-temperature burner blocks, kiln linings
- Energy-saving furnaces (up to 2400°C)
- Induction furnaces, molybdenum/tungsten furnaces, nitrogen furnaces
Technical Specifications
Chemical Composition & Physical Properties
| Item | Specification |
|---|---|
| Al₂O₃ (%) | ≥99 |
| SiO₂ (%) | ≤0.3 |
| Na₂O (%) | ≤0.25 |
| Fe₂O₃ (%) | ≤0.15 |
| Refractoriness (°C) | 1800 |
| Bulk Density (g/cm³) | 0.5–1.0 |
| Particle Size (mm) | 0.2–5 |
| Main Phase | α–Al₂O₃ |
Typical Particle Size Range
Standard sizes available (customized size distribution available on request):
Main Characteristics
- High purity (≥99% Al₂O₃)
- Low impurity content and excellent thermal stability
- Lightweight with high crushing strength
- Low bulk density and excellent insulation performance
- Resistant to high-temperature corrosion and erosion
📦 Packaging
Standard: 25 kg woven plastic bags or 1000 kg jumbo bags
Custom packaging available on request