Our company can customize thermal conductive silicone sheets with a thermal conductivity ranging from 1.0 to 15W. We also have products such as thermal conductive sealants, thermal conductive adhesives, and liquid adhesives. Regarding exports, our products have low thermal resistance and excellent flame retardancy. We can customize various sizes according to customers' requirements, and the colors can also be customized. For products of the same type, we also have thermal conductive silicone.

Our technicians have been engaged in the industry for more than 10 years and possess rich experience.

In the relentless pursuit of smaller, faster, and more powerful electronic devices, one persistent challenge remains: heat. Excessive heat is the nemesis of electronic components, leading to reduced performance, system instability, and premature failure. As processors and power densities have skyrocketed, traditional cooling methods like aluminum heat sinks and fans have reached their limits. The bottleneck is often not the heat sink itself, but the microscopic air gaps between the heat-generating component and the cooling solution. Air is a poor thermal conductor, and these gaps create significant insulating barriers. This is where a remarkable class of materials comes into play. Thermal conductive silicone has emerged as a fundamental engineering material, silently and efficiently enabling the thermal management that underpins our technological world.

What is Thermal Conductive Silicone?

At its core, thermal conductive silicone is a synthetic elastomer, a rubber-like material, that is engineered to possess high thermal conductivity while maintaining the beneficial properties of silicone. It is not a single compound but a carefully formulated composite.

Its structure consists of two primary parts:

1. Silicone Polymer Matrix: This base provides inherent flexibility, high electrical insulation, resistance to extreme temperatures (typically from -50°C to over 200°C), and excellent environmental stability. It is resistant to moisture, oxidation, and many chemicals.
2. Thermally Conductive Fillers: The silicone matrix itself is thermally insulating. To transform it into a conductor of heat, manufacturers load it with a high volume of fine ceramic or metal powder fillers. These fillers create percolation pathways within the silicone, allowing heat to travel through the material. Common fillers include aluminum oxide, boron nitride, zinc oxide, and in highly conductive grades, aluminum nitride or even silver. The type, size, shape, and concentration of these particles directly determine the thermal performance of the final product.

This combination results in a material that is both soft and conformable yet capable of effectively channeling heat away from sensitive components.

Key Properties and Advantages

The widespread adoption of thermal conductive silicone is due to a unique combination of properties that are difficult to find in any other single material.

• High Thermal Conductivity: Ranging from 0.5 W/mK to over 5.0 W/mK, these materials offer a significant upgrade over air (0.024 W/mK), effectively bridging the thermal gap between components and heat sinks.
• Electrical Insulation: Despite their excellent thermal conduction, most formulations are excellent electrical insulators, with high dielectric strength. This is a critical safety feature, preventing short circuits on densely packed printed circuit boards (PCBs).
• Conformability and Low Interface Resistance: Unlike rigid, solid materials, thermal conductive silicone is soft and compressible. It can conform to uneven surfaces, microscopic scratches, and imperfections on both the component and heat sink, displacing the insulating air and minimizing Thermal Interface Resistance (TIR). This intimate contact is the key to its efficiency.
• Flexibility and Resilience: The material can withstand stress, vibration, and thermal cycling without cracking, tearing, or permanently deforming. It maintains its sealing and thermal transfer properties over long periods under harsh conditions.
• Ease of Application: Available in pre-cured sheets (pads) or dispensable pastes (grease), it offers manufacturers versatility. Pads are clean and easy to handle for assembly, while pastes can be dispensed automatically for high-volume production and can fill larger, irregular gaps.

Common Forms and Applications

Thermal conductive silicone is versatile and comes in several forms, each tailored for specific applications across numerous industries.

Thermal Grease (Paste): This is a viscous, semi-liquid compound consisting of silicone oil filled with conductive particles. It offers the lowest thermal impedance because it can form an extremely thin layer, perfectly filling micro-imperfections.