Nano-microporous insulation board
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### Introduction, Performance, Specifications, Advantages, and Applications of Nano-Microporous Insulation Panels
#### **I. Introduction**
Nano‑microporous insulation panels are a new type of thermal insulation material developed based on the nano‑micropore principle. Their core structure consists of numerous micropores with diameters less than 100 nanometers—indeed, in some materials, more than 80% of the pores are smaller than 50 nanometers. This unique architecture effectively suppresses both conductive and convective heat transfer by impeding gas molecule movement, resulting in an exceptionally low thermal conductivity. Typically fabricated from silica (SiO₂) and enhanced with infrared‑blocking agents, ceramic fibers, aluminum foil, or other additives, these panels are produced through specialized pressing processes, offering lightweight construction, superior thermal insulation, and excellent high‑temperature resistance.
#### **II. Core Performance**
1. **Ultra-low thermal conductivity**
- At room temperature, its thermal conductivity is as low as 0.019–0.031 W/(m·K), and even at 800°C it remains within the range of 0.04–0.052 W/(m·K)—only one-half to one-tenth that of still air, and one-third to one-quarter of conventional insulation materials such as ceramic fiber and rock wool.
- The thermal conductivity exhibits only a small variation with increasing temperature, ensuring stable performance under high-temperature conditions.
2. **High-Temperature Resistance**
- Long-term operating temperature range: 400–1000°C; some products can withstand temperatures up to 1100°C.
- At 800°C, the linear shrinkage after 6 hours is less than 1%; after heat treatment at 1000°C for 5 hours, the thermal conductivity increases by only about 3.7%, demonstrating excellent structural stability.
3. **Thermal Stability and Heat Storage**
- It has a low specific heat capacity (approximately 0.8 kJ/(kg·K) at 400°C), resulting in a small thermal storage capacity, excellent thermal shock resistance, and rapid response to temperature changes.
4. **Environmental Protection and**
- Class A1 non-combustible material, which does not emit smoke or toxic gases when burned.
- Contains no inhalable harmful fibers, emits no odor when heated, and is non-irritating to the skin.
5. **Physical Properties**
- Bulk density: 80–430 kg/m³; the lightweight design facilitates installation.
- Compressive strength: 0.25–0.3 MPa (at 10% compression), meeting structural support requirements.
- Flexibility: Can be processed into sheets ranging from 5 to 100 mm thick, accommodating complex shapes.
#### **III. Key Metrics**
| **Metric** | **Value Range** | **Test Conditions** |
|------------------|----------------------------------|---------------------------|
| Thermal Conductivity | 0.019–0.052 W/(m·K) | 70–800°C, ASTM C-177 standard |
| Operating Temperature | 400–1100℃ | Long-term/Short-term Temperature Resistance Test |
| Linear Shrinkage | ≤2% (800℃ × 12 hours) | Measured after high-temperature heat treatment |
| Compressive Strength | 0.25–0.3 MPa | Tested at 10% compression |
| Bulk Density | 80–430 kg/m³ | Standard density test |
| Combustion Performance | Class A1 (UL94 V-0 flame retardant) | Vertical Burning Test |
#### **IV. Core Advantages**
1. **Significant energy-saving efficiency**
- Taking a 150 mm‑diameter pipe operating at 600°C as an example, when the insulation thickness is only one‑third that of conventional mineral wool, each meter of pipe saves 1,400 kWh of electricity annually; for a 1,000‑meter pipeline, annual energy savings amount to approximately 1.4 million kWh.
- In ladle applications, it can reduce molten steel temperature drop, lower refining energy consumption, and shorten baking time by more than 30%.
2. **High space utilization**
- The insulation layer thickness can be reduced by 50–70%, thereby increasing the equipment’s effective volume (e.g., ladle capacity can be increased by 5–10%).
- Suitable for thickness-sensitive applications (such as thermal insulation between energy-storage cells).
3. **Lifespan and Reliability**
- Service life of 5–10 years, 2–3 times that of conventional materials.
- Low shrinkage (<2%) reduces the risk of thermal shock cracking and enhances equipment reliability.
4. **Environmental Protection and Cost-Effectiveness**
- Prices are 50% lower than comparable foreign products, with a short payback period for energy savings—typically 1–2 years.
- No harmful substances are released, meeting green manufacturing standards.
#### **V. Typical Application Areas**
1. **Iron and Steel Metallurgy**
- **Ladle/Intermediate Ladle**: Reduces the shell temperature by 100–200°C, extending the lining life by more than 30%; enables tapping at a low superheat, thereby improving molten steel purity.
- **Torpedo ladle**: Reduces heat loss and improves transportation efficiency.
2. **Petrochemical Industry**
- **Cracking Furnace/Heating Furnace**: Reduces furnace wall temperature by 50–80°C, achieving 15–20% energy savings and lowering CO₂ emissions.
- **High-Temperature Piping**: Insulation thickness reduced by 60%, resulting in a 40% reduction in heat loss.
3. **New Energy Storage**
- **Cell-level thermal insulation**: Suppresses the propagation of thermal runaway, providing the system with 10–15 minutes of emergency response time.
- **Pack‑level/Container‑level**: Construct fire barriers with UL94 V‑0 flame retardancy to reduce fire risk.
4. **Glass and Ceramics**
- **Float Glass Tank Furnace/Tempering Furnace**: Improved temperature uniformity across the furnace walls, reducing the glass defect rate.
- **Roller Kiln/Tunnel Kiln**: Energy savings of 25–30%, with a 40% reduction in heating time.
5. **Electricity and Building Materials**
- **Boiler/Turbine**: Reduces heat loss and improves thermal efficiency by 5–8%.
- **Ceramic Kilns**: Extend the service life of the kiln lining and reduce maintenance costs.
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Nano-microporous insulation board
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