In the world of high-end players, it will put the motherboard on the radiator (refer to the large radiator), the purpose is only one, that is, give the computer chip a strong heat! We all know that the CPU temperature is large and the performance of radiator, a very intuitive feeling is the volume of the radiator.
Many people have done experiments, and the gap between the radiator of more than a dozen dollars is very large, but the two hundred dollars will go up, to 500 yuan or even a thousand yuan, the temperature of the CPU is not so much. Obviously, the temperature can be considered unless the water-cooler radiator is used.
Speaking here, everyone should understand that the size of the simple increasing heat sink has not improved heat dissipation performance, and it seems to have a bottleneck. After analysis, this bottleneck is our uncomfortable thermal silicone! Because the thermally conductive silicone is used in the state of use, it is a thin layer, and the thermal conductivity is not an important indicator for each DIY player.
2 What is silicone? What is silicone?
Silicone this thing, it seems to be in an eye, but it is a very important position in the entire heat dissipation system, such as Bentley of 5 million yuan, no four tires, strong engine and luxurious interior, car always Can't drive. The heat-conductive silicone is used as a heat medium, and the heat dissipation of the chip is a bridge.
High viscosity silicone oil
The ingredients of silicone fat are known, the additive of the silicone oil plus the heat conductivity is its own, an important indicator is insulation. In nature, the insulated object is basically isolated to the surface, and will not pass itself Let electronic transmission. Therefore, in addition to the semiconductor, the thermal conductivity of the pure insulator will be very poor. Semiconductors only have silicon, or other metal compounds, but due to high price, only in high-end silicone is generally present.
High purity silicon
Although silicone oil is a silicon-based compound, the thermal conductivity is far less than single crystal silicon, and the link between the elemental element atom is tightly, and the number of atomic outer electrons can be substantially easily electrically conductive, which is easy to conduct. According to theory, we use single crystal silicon not just good, the highest 12V voltage on the motherboard is far less than a single crystal silicon, it is a great hot media! Unfortunately, if there is no medium to flow to the flies, it is true, so all silicon-lipid thermal heatscent agents are folded, that is, at a certain voltage, it can be low. Cost acquisition the maximum thermal conductivity.
3 The real difference here is here true here.
From the ingredients, it is difficult to distinguish between ordinary silicone and high-end silicone fat, but if analyzed by using an angle, it is very obvious. In addition to the thermal conductivity of the silicone, there is a viscosity coefficient, thermal resistance, and oil separation or the like directly affect the effect of silicone.
Conducting coefficient measuring instrument
The thermal conductivity is obvious, that is, the thermally conductive performance parameters of this silicone stain. The viscosity coefficient affects the extent of silicone-stoading, if the silicone is not sticky, such as water or oil, will be attached to the interface due to its own tension problem, if the viscosity is High, you can refer to the asphalt drops test, so you can't spread it at the interface. The thermal resistance is a relatively rely on performance parameter. Since our interface temperature is between up to 100 ° C, the temperature increases due to the increase in thermal resistance can be basically ignored.
Ultra high viscosity asphalt drops
In addition to the above indicators, the other is that the silicon lifeline is oil separation, and the oil ingredient itself refers to the case where silicon oil is precipitated under certain temperature conditions. The silicone we use is mixture, in a certain case These substances can be separated, and the action that the silicone oil plays in silicone is to increase the fluidity of the medium to fill any willing gap.
Inferior silicone is very cheap
Once the silicone oil is too fast in silicone, the silicone is fat, resulting in a slit between the medium and the interface, the thermal conductive area is reduced, or the medium is reacted with air, and the properties are reducing performance. Therefore, we can drop the different silicone fat on the paper towel, in the case where the time variable is consistent, see which oil precipitation is small, which silicone has a relatively longer life, and the physical chemical properties are more stable.
The price of 7783 is incapable
So the next time, when choosing silicone, refer to the performance parameters of the above silicone fat, select the use of better use, and can obtain a better use effect.
Original address: https://www.eeboard.com/news/cpu-29/
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