Our Alumina Bubble Insulation Brick for Ceramic Kilns is engineered to meet the demanding thermal insulation needs of ceramic firing processes. Composed of high-purity alumina and hollow alumina bubbles, this brick combines lightweight structure with superior insulating properties. It provides excellent thermal shock resistance and mechanical strength, ensuring reliable performance at temperatures up to 1800℃. Ideal for reducing heat loss and improving energy efficiency in ceramic kiln linings.
Technical Specifications
| Item / Grade | 85 | 90 | 99 |
|---|---|---|---|
| Max Service Temperature (℃) | 1680 | 1700 | 1800 |
| Al₂O₃ Content (%) | ≥85 | ≥90 | ≥99 |
| SiO₂ Content (%) | ≤13 | ≤8 | ≤0.2 |
| Fe₂O₃ Content (%) | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk Density (g/cm³) | 1.4–1.7 | 1.4–1.7 | 1.4–1.7 |
| Cold Crushing Strength (MPa) | ≥12 | ≥10 | ≥9 |
| Reheating Linear Change (1600℃ × 3h) | ±0.3% | ±0.3% | ±0.3% |
| Thermal Expansion Coefficient | ~7.8×10⁻⁶/℃ | ~8.0×10⁻⁶/℃ | ~8.6×10⁻⁶/℃ |
| Thermal Conductivity (at 1800℃) | ≤0.8 W/m·K | ≤1.3 W/m·K | ≤1.5 W/m·K |
Key Features
Lightweight design reduces kiln wall weight and improves heat retention.
Superior thermal insulation lowers energy consumption during firing cycles.
Excellent resistance to thermal shock ensures long service life under rapid temperature changes.
High alumina purity provides strong corrosion and chemical resistance in kiln atmospheres.
Customizable shapes and sizes to fit specific kiln designs.
Typical Applications
Thermal insulation lining for ceramic and porcelain kilns.
Backup insulation in high-temperature kiln zones.
Energy-saving retrofits for existing ceramic firing equipment.
Insulation in glass and refractory material production kilns.
Production Details
Our Alumina Bubble Insulation Bricks are produced using advanced high-temperature sintering technology and strict quality control procedures. The incorporation of high-purity alumina bubbles creates a porous, lightweight structure that delivers excellent insulation and mechanical performance. Each batch undergoes rigorous testing for chemical composition, density, strength, and thermal properties to ensure consistent product quality.
Packing and Shipping Details
Packaging: Standard wooden crates or pallets, securely wrapped to prevent damage during transportation.
Quantity per Crate: Depends on brick size; typically 50-100 pcs per crate.
Shipping Method: Sea freight, air freight, or express courier based on customer requirements.
Delivery Time: 15-30 working days after order confirmation.
Custom Packaging: Available upon request for special project needs.
Frequently Asked Questions (FAQ)
Q1: What is the maximum service temperature of alumina bubble insulation bricks?
The bricks can operate reliably up to 1800℃ depending on the grade.
Q2: Can custom sizes or shapes be made?
Yes, we offer customization based on customer drawings or specific furnace requirements.
Q3. How does alumina bubble brick compare to traditional insulation bricks?
It is lighter, has better thermal shock resistance, and provides superior insulation due to the hollow alumina bubbles.
Q4: What is the typical delivery time after placing an order?
Usually between 15 to 30 working days, depending on order quantity and customization.
Q5: Are these bricks resistant to chemical corrosion?
Yes, with high alumina content and proper sintering, the bricks resist various corrosive atmospheres.
