How to Choose Aerogel Powder in Vacuum Insulation Panels?

August 15, 2024

Choosing the right aerogel powder for use in Vacuum Insulation Panels (VIPs) requires careful consideration of several factors to ensure optimal performance and suitability for specific applications. Below is a guide on how to select aerogel powder in VIPs, focusing on important criteria and considerations.

Key Factors to Consider of Silica Aerogel Powders

Thermal Conductivity

Lower Values are Better: Look for aerogel powders with the lowest thermal conductivity (ideally in the range of 0.01 to 0.03 W/(m·K)). This will directly impact the insulation performance of the VIP.

Testing Standards: Ensure that the thermal conductivity is measured following recognized industry standards (e.g., ASTM or ISO).

Density

Lightweight Materials: Consider the density of the aerogel powder, as lower density (typically 0.03 to 0.3 g/cm³) results in lighter panels that can be easier to handle and install.

Trade-offs: While lower density reduces weight, it may also impact mechanical properties. Balance these based on application needs.

Aerogel Insulating Solutions Porosity and Surface Area

High Porosity: High porosity (>90%) helps to trap air effectively, improving insulation quality.

Surface Area: A higher surface area can improve absorption and bonding with other materials when forming composite panels.

Particle Size and Distribution

Optimal Size: Finer aerogel powders (typically in the micron range) can provide better thermal insulation due to a larger surface area, but harsh conditions during processing must be considered.

Uniform Distribution: Look for suppliers that offer consistent particle size distribution to ensure uniformity in panel performance.

Mechanical Strength and Flexibility

Structural Integrity: Aerogel powders should have sufficient mechanical strength to withstand handling and installation stresses.

Flexural Strength: Consider the requirements based on panel thickness and intended use, as some applications may require more flexibility or rigidity.

Hydrophobic/Hydrophilic Properties

Choosing Based on Environment: Depending on the application environment (e.g., humid conditions), hydrophobic aerogels may be preferable as they resist moisture absorption.

Long-term Performance: Hydrophilic materials may require Protective Coatings or barriers to prevent moisture-related degradation.

Thermal Stability of Silica Insulations

High Temperature Tolerance: Ensure that the aerogel powder can withstand the expected temperature range of the intended application without significant degradation. Look for materials with high thermal stability (>300°C) for more demanding environments.

Fire Resistance

Fire Safety Standards: Evaluate the combustibility and fire resistance of the aerogel powder. Non-combustible aerogels are generally preferred in applications requiring high safety standards.

Cost and Availability

Budget Considerations: Aerogel materials can vary significantly in cost. Compare the performance benefits to the costs and consider your budget.

Supplier Reliability: Check the availability and reputation of suppliers to ensure you can obtain the aerogel powder consistently.

Environmental and Health Considerations

Sustainability: Look for aerogel materials that have been produced using environmentally friendly methods.

Health and Safety: Ensure that the powder complies with safety regulations and standards, particularly if it involves worker exposure during manufacturing or ins

Author:

Mr. Wen Yuan

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info@eastmaterials.com

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