New Material Story | Silicon Nitride Ceramic Ball: Technological Innovation Makes This "Pearl" More Brilliant


The moment the material wakes up, it will become a feeling in your life. Look, listen, touch In it, materials are everywhere. The skilled craftsmen of China Building Materials Group are experimenting, persevering, innovating, and persevering. They only aim to achieve the potential behind materials and develop the treasures they contain. We have always cherished the "great person of the country" and built "the great material of the country" to serve national defense construction, major national projects, the main battlefield of the national economy, and the good life of the people

"New Material Story" will use easy to understand words to better understand the ubiquitous new materials around us, and tell us the story of our pace with social development and human life.

Innovation and Application of Silicon Nitride Ceramic Ball

With social progress and the rapid development of science and technology, the use environment and conditions of bearings are becoming increasingly diverse, and the requirements for the structure, material, and performance of bearings are also becoming increasingly high. With continuous breakthroughs and innovations in applied material science, silicon nitride ceramic ball bearings have emerged as the times require.

Speaking of this, many people have questions: How can ceramics, which is fragile and fragile, be used for bearings? Aren't they usually made of metal and steel? In fact, silicon nitride ceramic is a new type of advanced ceramic material prepared by artificially synthesized high-purity silicon nitride powder under high temperature and pressure. Its weight is one-third of that of steel, and its hardness is second only to that of diamond. Compared with other materials, silicon nitride ceramic has many excellent properties such as low density, high strength, high temperature resistance, corrosion resistance, long life, self-lubrication, high hardness and toughness, and non magnetic insulation. It is currently the structural ceramic with the best comprehensive performance, It is known as "all-round ceramics", "black ceramic steel", and "the pearl in the crown of advanced ceramic materials".

Aerospace, navigation, nuclear industry, petrochemical industry, medical equipment, light textile industry, metallurgy, electric power, food, transportation, high-speed machine tools, and other fields need to work under special conditions such as high temperature, high speed, deep cold, flammable, explosive, strong corrosion, vacuum, electrical insulation, non magnetic, dry friction, and so on. Silicon nitride ceramics can not only withstand the harsh working environment that metal materials and polymer materials are unable to meet, "It also has all the important characteristics required for bearing materials. Therefore, although silicon nitride ceramics are not the hardest and have the highest toughness among ceramics, they are considered to have the best comprehensive mechanical and physical properties.". Nowadays, applying this kind of advanced ceramic materials to bearing manufacturing has become a hot spot in the development and application of high-tech in the world and a symbol of the material technology revolution in the mechanical industry.


development history


Early 1960s

The United States and other European and American countries have begun to study the application of ceramic materials in rolling bearings.



Japan has started research on such projects.



Shandong Gongtao Institute established a silicon nitride project team.



The pressureless sintered silicon nitride was successfully developed.



Establish a silicon nitride research laboratory.



Build the first pilot production line of silicon nitride ceramic bearing balls with an annual output of 800000 grains in China.



A production line with an annual output of 12 tons of silicon nitride ceramic bearing balls was built in Beijing.



Sinoma High tech Nitride Ceramics Co., Ltd. was established in Shandong.



The silicon nitride ceramic bearing ball production demonstration line of the National Industrial Ceramic Engineering Technology Center has been completed.


September 2017

The construction of a high-performance silicon nitride ceramic production line with an annual output of 100 tons has commenced.


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