According to the news on the website of the Ministry of Science and Technology on the 19th, the Beijing Sinoma Artificial Crystal Research Institute Co., Ltd. has successfully completed the acceptance of the major scientific and technological achievements transformation project in Beijing "Research and Industrial Development of Silicon Nitride Ceramic Bearing Balls for Wind Power Bearings".

The project has been implemented for three years and has achieved important results: First, breakthroughs in nano-modification of silicon nitride powder, "self-wrapping" hot isostatic pressing sintering, low-stress flexible precision machining, and non-destructive testing and control of large-size silicon nitride ceramic bearing balls and other key technologies, to overcome the disadvantages of the high cost of HIP sintering by the traditional "glass sheath" method after molding; the second is to break the domestic large-size silicon nitride ceramic bearing balls with poor machining accuracy and consistency, and rely on foreign companies for a long time. The processing accuracy of ceramic balls with specifications above 40mm has been improved to G28 level, which is much higher than the domestic G60 level processing level and has reached the international advanced level. The mass production line has achieved high density, high stability, high reliability and high consistency of production; the fourth is to realize the visualization of ceramic sintering and accurate positioning and qualitative analysis of internal defects, and establish silicon nitride ceramic bearings for wind power bearings. The fifth is to apply for 3 patents, formulate 2 enterprise standards, and cultivate and introduce 20 technical and management talents.

According to the current annual increase of wind turbine installed capacity more than 1 times, the domestic investment in high-power grid-connected wind turbines, the domestic and foreign markets of wind power silicon nitride bearing balls are expected to exceed 2 million, and the market capacity exceeds 2 million each year. 1 billion yuan.

The successful implementation of the project, on the one hand, broke the international technology blockade and monopoly, and on the other hand, reduced the product price by nearly 50%, and accelerated the localization process of key components of high-power grid-connected wind turbines.

It is reported that Beijing Sinoma Intraocular Lens Research Institute Co., Ltd. (Crystal Company for short) is a high-tech enterprise affiliated to China Sinoma Group Corporation. Its predecessor was Sinoma Intraocular Lens Research Institute established in 1963. The Institute of Crystallography has a team of technical talents with academicians of the Chinese Academy of Engineering and national experts as the core, with strong scientific and technological development strength, in nonlinear optical crystals, infrared optical materials, scintillation crystals, glass ceramics, transparent ceramics, artificial synthesis The preparation technology of materials such as catalyst alloy powder for diamond has reached the international leading, advanced or domestic leading level, and has provided key material support for major national engineering projects (such as Shenguang, Shenzhou spacecraft, Chang'e-1, Beijing 29th Olympic Games) for many times . Crystal company's products are widely used in laser, optoelectronics, communications, infrared technology, aerospace, nuclear industry and other national defense industries and various fields of the national economy.