Detailed Explanation of the Working Principle of Nano-Microporous Insulation Panels: A Technical Analysis by Zhengzhou Jinshan Refractory in 2026

Core Definition and Structural Foundations of Nano-Microporous Insulation Panels

Nano-microporous insulation panels refer to… Made primarily from nano‑scale siliceous materials and formed at high temperatures, this high‑porosity rigid insulation board is one of the solid insulating materials with the highest thermal conductivity performance currently available in the industrial sector.

As a widely used energy‑saving thermal insulation material in high‑temperature industrial applications, the performance of nano‑microporous insulation boards hinges entirely on their unique internal structure. Zhengzhou Jinshan Refractory Materials Co., Ltd., a specialized manufacturer of refractory products, rigorously controls the structural parameters of its products during the 2026 production process to ensure stable thermal insulation performance.

Main raw material composition of nano-microporous insulation panels

The primary raw material of nano‑microporous insulation boards is nano‑sized silica powder, combined with a small amount of silica fume, infrared‑reflective additives, and binders. For certain specialized applications, ceramic fibers are also incorporated to enhance the board’s mechanical strength. The purity of these raw materials directly affects the final performance of the nano‑microporous insulation board.

Core Structural Features of Nano-Microporous Insulation Panels

The core structural features of nano‑microporous insulation panels are high porosity and small pore size. Industry production standards for 2026 specify that qualified products exhibit a porosity of 80%–90% and an average pore diameter of less than 70 nm—just below the mean free path of air molecules. This characteristic forms the fundamental basis for the low thermal conductivity of nano‑microporous insulation panels.

Breakdown of the Core Working Principle of Nano-Microporous Insulation Panels

The working principle of nano‑microporous insulation panels centers on interrupting heat transfer through its three primary mechanisms, which can be broken down into three key steps:

1. Restriction of convective heat transfer: The nanoscale pore size is smaller than the mean free path of air molecules, preventing them from moving freely within the pores and thereby fundamentally inhibiting convective heat transfer.
2. Suppression of radiative heat transfer: The added infrared‑reflective additives can reflect most of the infrared thermal radiation generated at high temperatures, thereby reducing heat transfer via radiation.
3. Blocking solid‑state heat conduction: The contact points between nanoparticles are extremely small, significantly interrupting the pathways for solid‑state heat transfer and thereby reducing the overall thermal conductivity of the composite panel.

 

The principle of convection inhibition in nano‑microporous insulation panels

We know that air itself is a poor conductor of heat, but convective motion within the air facilitates heat transfer. In nano‑microporous insulation panels, the pore size is smaller than the mean free path of air molecules, preventing collisions and convection. As a result, the air trapped in the pores virtually does not conduct heat—this is the fundamental reason why the thermal conductivity of such panels is far lower than that of conventional materials.

Principle of Thermal Conduction and Radiative Barrier in Nano-Microporous Insulation Panels

In terms of solid‑state heat conduction, the primary material of nano‑microporous insulation boards consists of nanoscale particles, whose interparticle contact area is extremely small, resulting in substantial resistance to heat transfer along the solid matrix and thus an exceptionally low thermal conductivity. Regarding thermal radiation, the incorporation of infrared‑reflective additives such as silicon dioxide and silicon carbide enables the material to reflect more than 80% of infrared radiation under high‑temperature conditions, further reducing overall heat transfer.

Comparison of the Principles Between Nano-Microporous Insulation Panels and Traditional Insulation Materials

Compared with conventional insulation materials, nano‑microporous insulation boards operate by blocking heat transfer across multiple dimensions, whereas traditional materials typically rely solely on their intrinsic material properties to reduce thermal conductivity. For a detailed comparison of their performance, please refer to the table below:

Performance advantages stemming from differences in core principles

As the underlying principles reveal, under the same thermal insulation requirements, nano‑microporous insulation boards are only one‑third to one‑quarter as thick as conventional materials. This allows for a substantial reduction in the overall volume of kilns and furnaces, thereby minimizing heat‑storage losses and helping industrial enterprises cut energy consumption—this is precisely why nano‑microporous insulation boards are increasingly favored in high‑temperature energy‑saving applications.

Limitations of the underlying principles of traditional insulation materials

Conventional insulation materials have relatively large pore sizes, which fail to suppress air convection. Consequently, under high-temperature conditions, the contribution of convective heat transfer increases significantly, leading to a rapid rise in thermal conductivity. In contrast, nano‑microporous insulation boards address this issue at the fundamental level, resulting in markedly superior thermal insulation performance at elevated temperatures.

The core factors influencing the performance of nano‑microporous insulation panels

The performance of nano‑microporous insulation panels relies entirely on their structural characteristics. During manufacturing, numerous process parameters can influence the final thermal insulation properties; two key factors are as follows:

The Influence of Porosity and Pore Size Distribution

According to industry research data from 2026, for nano‑microporous insulation panels, every 5% increase in porosity can reduce the thermal conductivity by approximately 0.005 W/(m·K). However, excessively high porosity compromises the material’s mechanical strength; therefore, qualified products typically maintain a porosity within the 80%–90% range. Additionally, all pore sizes must be smaller than 70 nm—any presence of larger pores will significantly degrade the insulation performance.

The Influence of Manufacturing Processes and Added Ingredients

The molding pressure of nano‑microporous insulation boards affects their porosity: excessive pressure reduces porosity, while insufficient pressure results in inadequate board strength. Meanwhile, the type and content of the infrared‑reflective additives also influence the material’s radiative heat‑shielding performance at high temperatures. During production, Zhengzhou Jinshan Refractories adjusts the additive formulation according to the customer’s operating temperature, ensuring that the nano‑microporous insulation boards deliver performance that meets the specific service‑condition requirements.

Key Considerations for Selecting Nano‑Microporous Insulation Panels Based on Their Operating Principles

Based on the operating principle of nano‑microporous insulation panels, two key performance indicators must be given priority during selection to ensure the chosen product meets the specific service‑condition requirements:

Select the product model based on the operating temperature.

Nanoporous insulation boards of different models have varying service temperature ranges: standard grades are suitable for operating conditions below 1,000°C, while modified grades are designed for 1,000–1,200°C. When selecting a product, be sure to allow sufficient temperature margin to prevent performance degradation at elevated temperatures, which could shorten the material’s service life.

Select the strength grade based on the installation scenario.

The strength of nano‑microporous insulation boards is inversely proportional to their porosity. For load‑bearing applications such as kiln linings, it is advisable to select higher‑strength grades; for thermal insulation fill applications, a grade with higher porosity and superior insulating performance may be preferred. Zhengzhou Jinshan Refractory Materials Co., Ltd. offers custom‑made nano‑microporous insulation boards tailored to specific operating conditions, with parameters adjustable to meet customer needs. For detailed specifications, please visit our official website at www.zz**refractory.com.

In summary, nanomicro‑porous insulation boards leverage a unique nano‑pore structure to deliver outstanding thermal insulation across all three modes of heat transfer. They are currently among the highest‑performing insulation materials in the industrial high‑temperature energy‑saving sector. As a specialized manufacturer of refractory materials, Zhengzhou Jinshan Refractory can provide customers with consistently reliable, qualified nanomicro‑porous insulation board products. For more product information, please visit www.zz**refractory.com.