Is it better to use thermal grease or silicone grease pads for heat dissipation? Or what liquid meta

In terms of thermal conductivity alone, liquid metal is better than silicone grease and better than silicone grease pads, and it is best to use silicone grease when considering it all.

Liquid metal you can refer to some introductions on the Internet, it is too troublesome to use, too expensive, and not cost-effective, unless it is a high-end desktop computer to play overclocking, it is not necessary, I think, and instead of spending a lot of effort on a medium, it is better to pay more attention to the air duct and radiator.

Silicone grease pads are suitable for components with less heat, such as video memory, which has the advantage of convenience, but the effect is mediocre.

Silicone grease is the mainstream, from 5 to 200, but I think as long as it is not too copycat, it is best to contain silver, domestic due to the relatively thin, the solvent volatilizes after the silicone grease hardens, cleaning trouble, imported letter will be better, it is not easy to apply too thick, the main purpose of this thing is to make the chip and the heat sink tightly combined, eliminate the gaps caused by uneven surface, and affect the heat dissipation effect.

But let's talk about my experience, my book used to be a domestic miscellaneous brand, a semi-annual heat dissipation module, by the way, change the silicone grease, in addition to the trouble of hardening and cleaning, it is not bad; Later, when the domestic production ran out, I bought one of Shin-Etsu, which was not bad, and there was no trouble of hardening, but the effect did not change much; Later, there was a problem with this book.,The maintenance department said that the letter I bought was a fake.,Professional standards smeared to me for a professional genuine letter.,Go home and see.,The heat dissipation is much worse than before.,Come back and change back to your own fake.,So,I think,The platform heat dissipation costs too much energy and silver on the heat dissipation medium is not worth it.。

Hello, heat dissipation is made of thermal grease, which can be used on any object, provided that it is used on what object, depending on the power of the object? Because the coefficient of thermal grease is different.

What kind of parts are you used for?

Summary. Comparison of the advantages and disadvantages of silicone heat sink and heat dissipation grease:

1: Silicone heat sink has flexibility and high compressibility, so it can be used as a shock absorber. It can be used as a shock absorber, while the heat dissipation grease is a paste and does not have a shock absorption effect.

2: In the short term, the thermal conductivity of heat sink grease is better than that of silicone heat sink, because the heat resistance of silicone heat sink is large, and the thermal resistance of heat dissipation grease is small.

3: The thermal conductivity of thermal grease is up to 10W mk, and the thermal conductivity of thermal conductive silica gel sheet is 1 to 40W mk.

4: The thickness of the heat dissipation grease is usually 5080um; Silicone heat sinks can be used as a thermal conductive material to fill gaps with a thickness of up to millimeters, and have a wide range of applications.

5: Silicone heat sink has stable thermal conductivity, the service life can be more than 10 years, the heat dissipation silicone grease is easy to appear boring, chalking, cracking and other conditions due to long-term use, and the service life is usually about 2 years.

6: After disassembling and assembling the heat dissipation grease, it is not possible to process it from scratch. The silicone heatsink can be installed and used from scratch.

7: The construction of heat dissipation silicone grease is more troublesome, it is difficult to disperse evenly, and it is easy to stain the surrounding equipment.

Which is better, heat dissipation silicone or thermal grease.

Comparison of the advantages and disadvantages of silicone heat sink and heat sink silicone: 1: Silicone heat sink has softness and high compressibility, so it can be used as a shock absorber.

It can be used as a shock absorber, while the heat dissipation grease is a paste and does not have a shock absorption effect. 2: In the short term, the thermal conductivity of heat sink grease is better than that of silicone heat sink, because the heat resistance of silicone heat sink is large, and the thermal resistance of heat dissipation grease is small.

3: The thermal conductivity of thermal grease is up to 10W mk, and the thermal conductivity of thermal conductive silica gel sheet is 1 to 40W: the thickness of heat dissipation grease is usually 5080um; Silicone heat sinks can be used as a thermal conductive material to fill gaps with a thickness of up to millimeters, and have a wide range of applications.

5: Silicone heat sink has stable thermal conductivity, the service life can be more than 10 years, the heat dissipation silicone grease is easy to appear boring, chalking, cracking and other conditions due to long-term use, and the service life is usually about 2 years. 6：

After disassembling and assembling the heat dissipation grease, it is not possible to process it from scratch. The silicone heatsink can be installed and used from scratch. 7：

The construction of heat dissipation silicone grease is more troublesome, it is difficult to disperse evenly, and it is easy to stain the surrounding equipment.

Hello silicone heat sink has high insulation, thickness of 1 mm, withstand voltage up to 15 kV; Thermal grease does not have an insulating function.

Choose a pro according to your requirements.

Thermal grease toothpaste, hand cream, lithium-based grease, petroleum jelly paste and other solid ointments.

Thermal grease, also known as heat dissipation paste, is a kind of thermal conductive medium, which is made of silicone as the main raw material, adding materials with excellent heat resistance and thermal conductivity, and is made of thermal conductive silicone grease. Thermal grease is often used for heat conduction and heat dissipation of electronic components such as CPUs in electronic devices.

As an alternative to thermal grease, in addition to trying toothpaste, hand cream, lithium grease, petroleum jelly paste and other solid ointments, thermal silicone sheet is a professional alternative to thermal grease.

Precautions for the application of thermal grease:

1. Use silicone grease to fill this part of the air gap, the thermal conductivity of silicone grease is much higher than that of air, which improves the thermal conductivity efficiency, but in fact, the thermal conductivity effect of silicone grease itself is far less than that of metal fasteners and CPU surface materials.

2. Therefore, when applying silicone grease, you must pay attention to the amount of silicone grease, which not only fills the gap, but also separates a layer of silicone grease between the buckle and the CPU, at this time, this layer of silicone grease is like a quilt placed on the surface of the CPU, but it has the opposite effect.

3, so silicone grease should be smeared as little as possible, take the CPU surface as an example, a small drop the size of a mung bean on the surface of the CPU is already a lot richer, use a professional hanging piece (no burrs) or fingers (with plastic gloves, recommended) to apply to the surface of the CPU, apply and press many times, and hang off the excess silicone grease (80 will be hung up!) ）。

Thermal grease is commonly known as heat dissipation paste, thermal grease is made of silicone as the main raw material, adding materials with excellent heat resistance and thermal conductivity, and is used for thermal conductivity and heat dissipation of electronic components such as power amplifiers, crystal noise hole object tubes, electron tubes, CPUs, etc., so as to ensure the stability of the electrical performance of electronic instruments and meters.

Thermal grease is a type of material used to fill the gap between the CPU and the heat sink, and this material is also called a thermal interface material. Its function is to conduct the heat emitted by the CPU to the heat sink, keep the CPU temperature at a level that can work stably, prevent the CPU from being damaged due to poor heat dissipation, and prolong the service life.

In heat dissipation and heat transfer applications, even two planes with very smooth surfaces will have gaps that quiver when they come into contact with each other, and the air in these voids is a poor conductor of heat and can hinder the conduction of heat to the heat sink. Thermal grease is a material that fills these voids and makes the heat transfer smoother and faster.

There are many types of silicone grease on the market today, and different parameters and physical properties determine different uses. For example, some are suitable for CPU heat conduction, some are suitable for memory heat conduction, and some are suitable for power supply heat conduction.

How the thermal grease is applied

Under the existing process conditions, there are three main ways to apply thermal grease: roller application, screen printing and stencil printing.

Roller application is the most traditional and easiest way to apply, with a simple and low-cost method for small batch production.

Silk screen and stencil printing are application methods that can be applied with precise control of uniformity or brightness and thickness, and are suitable for mass production. Wire mesh is suitable for applications with a thin thickness of silicone grease, while stencil is suitable for applications with a thicker thickness of silicone grease.

Selection of thermal grease

There are many factors to consider when choosing a thermal grease, such as thermal conductivity, viscosity, dielectric strength, volatile content, and spillage and drying characteristics.

The thermal conductivity of the thermal grease is an important indicator, and for thermal design, the higher the thermal conductivity of the grease, the more conducive to the heat dissipation of the power module. However, this is not to say that the higher the thermal conductivity, the better, and the high thermal conductivity grease uses large particle fillers, which will limit the minimum thickness when applying the grease. In addition, the viscosity of silicone grease with high thermal conductivity is relatively large, which is not conducive to the diffusion of silicone grease.

The dielectric strength and thermal conductivity of thermal grease are just opposite, and they are mainly affected by the proportion of fillers, so the dielectric strength of high thermal conductivity silicone grease is relatively low, and the insulation is relatively poor.

Precautions for using thermal grease

Preparation before use of thermal grease: Before using thermal grease, it needs to be stirred well until the color and consistency are uniform.

Storage and life of thermal grease: Thermal grease has strict requirements for storage conditions such as temperature and humidity, and specific parameters are generally indicated in the specification, as well as the width of the shirt with the best before date of use.

Evaluation of the application effect of thermal grease: After the installation of thermal grease, the installation pressure cannot completely distribute the grease, and more than three temperature cycles will be very conducive to the distribution of the grease. If you want to evaluate the effect of silicone grease application, you can take the module vertically away from the heat sink after the temperature cycle and directly observe the silicone grease distribution to evaluate; If quantitative evaluation is required, the thermal resistance of the entire heat dissipation system needs to be tested, and the thermal resistance value can directly reflect the application effect of silicone grease.

Thermal grease erasure: In some cases where thermal grease needs to be wiped off the module substrate or heat sink, alcohol or isopropyl alcohol is a viable erasing solution, and it is recommended to use a clean paper or cloth for wiping.

Comparison of the specific advantages and disadvantages of thermal conductive silica gel sheet and thermal grease: 1. Thermal conductivity effect: In the short term, the thermal conductivity effect of thermal grease is better than that of thermal conductive silica gel sheet, because the thermal resistance of thermal conductive silica gel sheet is large, and the thermal resistance of thermal grease is smaller; 2. Thermal conductivity:

Thermal conductivity of thermal grease, thermal conductivity of thermal conductive silicon Shenjing film; 3. Construction: The construction of thermal grease is troublesome, it is difficult to apply evenly, and it is easy to stain the surrounding devices. The thermally conductive silicone sheet is cut according to the size because it has been believed in advance, and it only needs to be torn off to protect the slippery and blind barrier film, and it can be pasted on the pasting surface, which is simple and convenient; You can choose according to your own needs and hardware conditions.

Good afternoon, this should be the general picture, such as your radiator, internal ventilation layout, fan power, etc. I bought liquid metal before is gallium alloy (from a colleague in Shenyang Metal Institute, melting point 38 degrees), the laptop is i7-3610QM QS, it stands to reason that this calorific value is obvious, the laptop is ASUS X45VD, I replaced the original motherboard BGA1023 for the detachable PGA988 (treacherous rock worthy of the name......X45VD actually has 2nd generation SNB and 3rd generation IVY two general motherboards, exactly the same, IVY is still replaceable CPU), the thermal power consumption is 45W 4 cores and 8 threads. The use of phase change silicone pad full load 85 degrees is generally 55 degrees, the use of liquid metal full load 80 degrees is generally used 45 degrees, down 10 degrees, the effect is more obvious, the fan turns less frequently.

But to be honest, 10 degrees doesn't talk much about laptops, the phase change silicone grease costs 2 yuan, and the gallium alloy small needle tube costs 50 yuan for 10 grams, and when running at full frequency, due to the sharp reduction of the melting viscosity of gallium metal, the contact with the copper sheet of the radiator is not so close, and the thermal conductivity is significantly reduced. Now I have changed to phase change silicone grease, which is good. In addition, there is a hidden danger that gallium alloy must not flow to the motherboard, a little bit of your motherboard will be gg and cannot be repaired, please refer to it as appropriate.

ps: The phase change silicone grease was not pasted well, and it was crooked, so it was 80 degrees, and then it was re-cut and fully covered (1mm thickness) and the full load dropped to 73 degrees after pressing the copper sheet, calling for the silicone grease. I used a 3D printing mold to fill the gallium alloy, between the heat dissipation copper and PLA with a hot melt glue gun fully enclosed, the inside is full of full contact, roast chicken is 80 degrees several times, and then I found that the volume of gallium metal changes greatly before and after melting, and it flows everywhere as soon as it melts, resulting in the copper sheet and the top of the CPU are not sealed, and the natural heat cannot be conducted, and it has no viscosity ......But you're talking about liquid metal heat dissipation pads, maybe silicone grease + liquid gold, I think there should be excellent performance, please try this.

Yes, the metal itself conducts heat very high, and then the liquid flow is higher.

Thermal grease is in the paste state, almost never cures, and can be maintained in the grease state of use for a long time at a temperature of -50 to +230.

Thermal grease is commonly known as heat dissipation paste, which is made of silicone as the main raw material and materials with excellent heat resistance and thermal conductivity, which is used for thermal conductivity and heat dissipation of electronic components such as power amplifiers, transistors, electron tubes, CPUs, etc., so as to ensure the stability of the electrical performance of electronic instruments and meters.

Thermal grease is a highly thermally conductive insulating silicone material that almost never cures and can remain in the same condition as a grease for a long time at temperatures ranging from -50 to +230. It not only has excellent electrical insulation, but also excellent thermal conductivity, and at the same time has low oil separation (tends to zero), high and low temperature resistance, water resistance, ozone resistance, and weather aging resistance. It can be widely coated in various electronic products, electrical equipment between the heating elements (power tubes, thyristors, electric piles, etc.) and heat dissipation facilities (heat sinks, heat sinks, shells, etc.), playing the role of heat transfer medium and moisture-proof, dust-proof, corrosion-proof, shockproof and other properties.

It is suitable for microwave communication, micro.

Silicon materials provide excellent thermal conductivity for electronic components that generate heat, such as surface coating or integral potting of various microwave devices such as wave transmission equipment, microwave special power supplies, and regulated power supplies. Such as: transistors, CPU assembly, thermistors, temperature sensors, automotive electronic components, automotive refrigerators, power modules, printer heads, etc.