Thermal silica gel, also known as thermal plastic, thermal silicone rubber, thermal silica gel, thermal conductivity, etc. Silicone is the main body, and it is made of silica gel mixed with polymer materials such as fillers and thermal conductive materials. It has good thermal conductivity and electrical insulation.
The thermal conductive silicone includes room temperature vulcanization and high temperature vulcanization. It is mainly used for elastic bonding, heat dissipation, insulation and sealing of electronic, electrical, instrumentation and other industries (it can provide the high elasticity and heat resistance required by the system, but also Transfer the heat of the system quickly.) Usually, the thermal conductivity of the high-temperature vulcanized thermal silica gel is higher than the room temperature vulcanization. The high-temperature vulcanized thermal silica gel is mainly applied in the form of a sheet as a gasket or a heat sink; the room temperature vulcanized thermal silica is mainly used in the electronics, home appliances and other industries. Bonding and packaging etc.
As a silicone rubber substrate with superior insulation and shock absorption performance, its thermal conductivity is only about 0.2W/(mK), but by adding high-functioning thermal fillers in the substrate, including metal fillers (such as Al, Cu, MgO) , AIN, BN) and non-metallic materials (such as SiC, graphite, carbon black, etc.), its thermal performance can be several times or even several decades of progress. The thermal conductivity of the thermal silica material is ultimately determined by the silicone rubber matrix, filler function, filler ratio, filler distribution, and processing technology.
Using the TC3000 hot wire method thermal conductivity meter, the thermal conductivity coefficients of several thermal conductive silica gel sheets with different additive components were tested. It can be seen that the thermal conductivity of different components of the thermal silica gel has significant differences. At the same time, the TC3000 has the upper hand when measuring irregular samples, and the thermal conductivity can be quickly obtained without special treatment of the sample.