How to Know The False Standard of Thermal Conductivity of Thermal Silicone Pad?

How to Know The False Standard of Thermal Conductivity of Thermal Silicone Pad?

Thermal silicone pad is also known as thermally conductive silicone gasket or thermal pads. Usually, the more intuitive standard that reflects the quality of heat conduction is the parameter value of thermal conductivity. The thermal conductivity of the thermal pad is one of the important parameters that can most directly reflect the performance of the thermal silicone gasket.

The importance of the thermal conductivity of thermal pads and the fact that most customers do not have instruments for testing the thermal conductivity of thermal pads, it is inevitable that the thermal conductivity of thermal pads has a false standard in the industry, and this chaos has always been troubled And it affects our customers to make correct judgments when purchasing thermal pads. As a domestic manufacturer of high-quality thermal pads, Nuofeng Electronics will give you an in-depth analysis of the industry chaos of false thermal conductivity of thermal pads today and the solution on how to avoid false thermal conductivity of thermal pads.

Today’s thermal pad industry is mixed, and the product quality is uneven. You should have noticed that the thermal conductivity of the high thermal pads produced by some domestic suppliers is 8.0W/m.k, and even some suppliers even mark the phenomenon of false labels above 10W/m.k. As far as the domestic silicone thermal conductive sheet is concerned, the thermal conductivity of 3W/m.k is already a technical threshold. The thermal conductivity of the thermal pads can reach 8.0W/m.k. There are only a few in China, and CoolThermo domestic thermal gaskets The thermal conductivity of high-quality manufacturers can be up to 8.0W/m.k, and the thermal conductivity of such a high thermal pad is currently unsurpassed by domestic counterparts.

It is estimated that many people will have such questions: since the thermal conductivity of thermal silicone pads so important, there should be a strict industry unified standard for the determination of the thermal conductivity of such products! In fact, this is not the case. The thermal conductivity measurement of thermal silicone pads is now a red sea in the entire industry, with chaos that you can’t imagine. Some manufacturers of thermal gaskets have the phenomenon of falsely high thermal conductivity, and in China, this phenomenon of falsely high and random standards is also very common.

CoolThermo encountered such a real case, a customer in Guangzhou who is engaged in high-end beauty equipment, found our sales staff and asked: What is the price of 15.0W/m.k high thermal conductivity silicone sheet. Our sales staff told the customer truthfully that the thermal conductivity of thermally conductive silicone gasket products is 6.0W/m.k and 8.0W/m.k. At present, there is really no 15.0W/m.k silicone thermal conductivity product on the market. . Our salesman asked the customer with a big question mark: which brand of thermal conductivity product you are using, is it an imported brand? Because our business people also find it strange, even in the world’s first-tier brand industry, I haven’t heard much about thermally conductive silicone gaskets with a thermal conductivity of 15.0W/m.k. Besides, the thermal conductivity of thermally conductive silicone gaskets exceeds 8.0W/m.k. , Few suppliers in the industry can do it. After some detailed understanding and inquiries, I got feedback from the customer because the supplier he is currently working with told them that the high thermal conductivity gaskets of 15.0W/m.k were sold to them, and this kind of high thermal conductivity gaskets can satisfy him The heat conduction heat demand of high-power products, but the price of the thermal silicone pads currently used is too high, so I want to find a low-cost thermally conductive silicone gasket material.

Encountering this kind of problem, the rich experience of CoolThermo business personnel is highlighted. It is estimated that there is a false standard for this so-called 15.0W/m.k high thermal conductivity gasket. First of all, let the customer send us the thermal pad sample on his hand for a detailed test report, and don’t let the falsely high thermal conductivity mislead the customer. Then we deeply understand the heat dissipation temperature requirements of the customer’s own products, and then recommend our CoolThermo LC600 thermal pad to send samples to the customer for product effect testing. The test results reported by the customers were expected by the CoolThermo business staff, and they began to make bulk purchases. The thermal conductivity gasket LC600 with a thermal conductivity of only 6.0W/m.k can meet the thermal conductivity of 15.0W/m.k required by customers. What is going on?

First of all, let’s analyze from the thermal conductivity measuring instrument: although the thermal conductivity testing standard has been standardized, but the testing instruments are different, and there is a huge gap in the test results. Because different thermal conductivity test instruments have different test principles and measurement standards. For example, the thermal conductivity of CoolThermo’s LC600 thermal pad is tested with the ASTM D5470 standard. The thermal conductivity measured by the Swiss HOTDISK testing instrument is 6.0W/m.k (Note: The international thermal conductivity material first-line brand measurement standard, there are few domestic thermal conductivity material manufacturers. Using Swiss HOTDISK test equipment). And we also used the ASTM D5470 test standard, and replaced it with the thermal conductivity tester of the Taiwan Ruiling brand to test the thermal conductivity of the LC600 thermal pad, which can reach 12W/m.k. And this experiment fully shows that many small manufacturers in our country’s high thermal conductivity test reports use measuring instruments that are not used in the world to conduct false height tests.

Furthermore, domestic thermal silica sheet manufacturers use different testing institutions and different test standards when calibrating thermal conductivity, resulting in huge differences in thermal conductivity values.
The following is a brief introduction to the thermal conductivity testing methods commonly used in the thermal conductive material industry:

  1. The European and American thermal conductive materials generally use the American laboratory standard ASTM5470, and Beggs and Laird belong to the earlier standards in the thermal conductivity industry.
  2. Domestic benchmark enterprises generally adopt the test standard of the Fifth Institute of Electronics of the Ministry of Industry and Information Technology (China Saibao Laboratory), which is more consistent with ASTM5470.
  3. Taiwan-based thermal conductive materials generally use ASTM E1530 test method, which is generally used in Taiwan or small domestic manufacturers. The measured data will be higher than the data tested by ASTM5470 and Saibao.
  4. The JIR test standard is generally used for the determination of Japanese thermally conductive materials. Fuji, Japan Electric. Closer to ASTMD5470.
  5. The data tested by the Beijing Rocket Research Institute (102 institutes) is outrageous. Generally, it will be much higher than the standard test method. The thermal conductivity of 12W/m.k comes from this.

So much has been said before, what should I do if I encounter a thermal silicone pads with a false thermal conductivity?
CoolThermo has been focusing on the research and development, production and sales of thermal silicone pads for ten years. In response to the problem of false thermal conductivity of thermal silicone pads, CoolThermo recommends choosing a manufacturer with strength and reputation. In the next issue, I will introduce “How to Correctly Choose Thermal Silicone Sheet Manufacturers”

As a high-quality domestic thermal silicone gasket company, CoolThermo always insists on using imported raw materials (imported thermal conductive silicone gasket powder and thermal oil), controls the quality of products from the source, maintains the brand image of CoolThermo, and does not compete with some peers Cowardly, play the game of artificially high thermal conductivity to deceive consumers and deceive customers, and do CoolThermo’s own power for China’s manufacturing.

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