The Beijing University of Science and Technology diamond expansion plate was successfully applied to the Beidou series of satellites!

The China Satellite Navigation System Management Office announced at the press conference of the State Council Information Office on the 27th that the basic system of the Beidou No. 3 was built to provide global services, which marked the official entry of the Beidou system from the region to the world.

Pakistan's transportation, port management, Indonesia's land planning, coastline mapping, Sino-Russian agricultural automation... From shining Asia-Pacific to embracing the world, Beidou shares China's "miracle" with the world.

Since the launch of the first launch of the Beidou No. 3 in November last year, the 19th year of the year, the Beidou No. 3 system has once again refreshed the record of constellation deployment with an alarming speed. In this series of satellite launches, Professor Li Chengming's research team of the New Materials Technology Research Institute of Beijing University of Science and Technology also made a special contribution to make a new breakthrough in the cooling of Chinese spacecraft.

One arrow double star launch site

In view of the rapid development of electronic devices, the high-energy power components of the new generation of navigation satellites and manned spacecraft have extremely high heat flux density, which can reach or exceed 500W/cm2. At the same time, due to the influence of space environment, the thermal control components are required to be small and light, which makes the traditional The heat exchange method is difficult to balance the two key requirements of small size and fast heat dissipation. As a result, there is a high probability that the electronic device integrated system will fail due to insufficient heat dissipation until catastrophic damage. In order to solve the problem of heat dissipation of ultra-high heat flux components in the aerospace field, the diamond film heat spreader developed by Professor Li Chengming of the Beijing University of Science and Technology has entered the space as the core thermal management component of the phased array component of Beidou navigation satellite. . In the Beidou No. 3 system, a total of three navigation satellites were loaded with this thermal control component.

The time is tight, the task is heavy, and the risk is high. In order to complete the heat dissipation task of this ultra-high heat flux device, Professor Li Chengming's team is under great pressure and has made painstaking efforts. In February 2016, the diamond film was passed as a review of the networked star-high thermal conductivity device. It took a year and a half to deliver hundreds of qualified samples. In order to ensure the quality of the products, the team has continuously adjusted and improved in the process of production process, product processing, surface modification, etc., and finally completed this task successfully in the Chinese aerospace field with the team's concerted efforts and unwavering confidence and determination. Provides an optimal solution to the extremely high heat flux density heat dissipation!

Long March 7 rocket launch

The significant advantages of this research compared to traditional heat sink materials are:

(1) Using the extremely high thermal conductivity of diamond to quickly reduce component temperature.

(2) The temperature gradient between the TR modules is significantly reduced to achieve isothermalization.

(3) Long-term work withstand high temperature and improve the service life of thermal control components.

(4) Significantly reduce the weight of the thermal control component, and have a weight advantage at the same time of high thermal conductivity.

The team of Professor Li Chengming from Beijing University of Science and Technology has an important influence in the diamond field at home and abroad. For many years, he has been aiming at the forefront of the diamond field and has achieved close integration with the country's major needs. He is a fruitful research team.

Diamond micro-slot heat sink application circuit

In the field of defense equipment, the diamond microchannel radiator developed by the team has been successfully applied to the multi-purpose spacecraft's reduction ratio return cabin equipped with the Long March 7 carrier rocket on June 26, 2016. Combining the extremely high thermal conductivity of diamond with the advantage of increasing the heat transfer area of ​​microchannels, in-orbit flight experiments show that the maximum heat flux density of diamond microchannels can be as high as 500W/cm2, which can meet the heat dissipation of spacecraft with extremely high heat flux. Claim. This development not only made great breakthroughs in the field of thermal management, but also a blockbuster in the field of diamonds. The diamond film thickness of the shaped diamond microchannel radiator is more than 3mm, which is a major diamond growth in China and the world. Achievements, obviously driving the development of ultra-hard materials micro-nano processing, diamond semiconductor technology and other fields, and strongly impact the application of diamond composite materials in the field of high-precision processing of titanium alloys and aluminum-magnesium alloys!

In order to promote the extensive application of diamond in the fields of national defense technology and electronic devices, Professor Li Chengming's research team will continue to adhere to the principle of “openness, cooperation, competition and progress”, and continuously promote technological breakthroughs and original innovations. Go ahead!

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