Our High Temperature Alumina Bubble Insulation Brick is specially engineered to provide outstanding insulation performance in extreme thermal environments up to 1800℃. Made from high purity alumina combined with hollow alumina bubbles, these bricks offer a unique combination of lightweight structure, low thermal conductivity, and excellent mechanical strength. This makes them ideal for use in various industrial furnaces, kilns, and thermal processing equipment where energy efficiency and durability are critical.
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 overall furnace weight and improves handling.
Exceptional thermal insulation lowers energy consumption and heat loss.
High thermal shock resistance for long service life under cyclic heating.
High alumina purity ensures corrosion resistance and chemical stability.
Customizable sizes and shapes to meet specific industrial requirements.
Typical Applications
Thermal insulation for industrial kilns and furnaces in metallurgy, ceramics, glass manufacturing.
Heat preservation layers in vacuum furnaces and crystal growth equipment.
Energy-saving retrofit projects for thermal processing industries.
Chemical reactors and petrochemical furnace insulation.
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.
