Silicon nitride ceramics
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Silicon nitride ceramics are gaining popularity due to their diverse applications and high performance properties. From energy and the environment to the automotive industry, these advanced ceramics play a vital role in enhancing performance, durability and efficiency. In this blog, we will explore the various applications of silicon nitride ceramics and delve into the unique characteristics that set them apart in the market.
One of the main applications of silicon nitride ceramics is the polysilicon reaction reduction furnace. These furnaces require insulating rings, heat shields and insulating bushings that can withstand high temperatures and provide a long service life. Silicon nitride ceramics have proven to be an excellent choice for these components due to their high temperature resistance and durability. By using silicon nitride ceramics, not only can the replacement frequency be reduced, but also cost can be saved, making it an optimal solution for energy and environment related applications.
Another area where silicon nitride ceramics shine is the aluminum foundry industry. The denseness, high temperature strength, thermal shock resistance and corrosion resistance of these ceramics make them highly sought after in various equipment components in this industry. The company has developed a series of high-performance silicon nitride ceramic products tailored for aluminum casting. Silicon nitride risers, heater protection tubes, shafts, rotors and thermocouple protection tubes are some examples of how these ceramics can be used to improve the efficiency and reliability of aluminum casting processes.
Hybrid ceramic bearings, especially those with silicon nitride balls, are also gaining popularity in the market. These bearings have many advantages such as high speed, light weight, self-lubrication, maintenance-free operation and electrical insulation. These properties make them particularly suitable for spindle bearings used in machine tools. The use of silicon nitride ceramics in hybrid bearings not only improves overall performance, but also helps improve energy efficiency and extend product life.
In the automotive industry, silicon nitride ceramics are used in various components. Automotive diesel engines, ceramic brake discs, engine PCU power control systems, and ceramic substrates are some examples of these ceramic applications. Silicon nitride ceramics have a unique combination of properties that make them ideal for these applications. They have high thermal conductivity, with a strength ranging from 600 to 800MPa, a fracture toughness of 6.0-8.0Mpa m1/2, and a thermal conductivity of 80-100/[(mK)], which can cope with the harsh conditions of the automotive environment. In addition, their at least 300 The current carrying capacity and thermal resistance of ≤0.5 (0.5 m Cu)(°C/W) further contribute to its suitability for automotive application.
Silicon nitride ball valves
Silicon nitride ball valves are widely used in photovoltaic, coal chemical, electric power, metallurgy, petroleum, petrochemical and other industries.
The silicon nitride ball valve with silicon nitride ball and valve seat as the core has the characteristics of erosion resistance, corrosion resistance, high and low temperature resistance. At the same time, the silicon nitride ball valve has self-lubricating property, low friction coefficient in the process of valve opening and closing, closer coupling between valve core and valve seat, better sealing performance, and its service life is dozens of times that of ordinary steel ball valves.
The floating ball valve of our company adopts the full bore structure design, and the one-piece or two-piece cast (forged) valve body. Through the quantitative compression of the reliable sealing ring, the sealing problem of the middle flange is solved to ensure no leakage.
The large diameter floating ball valve is designed with a drift diameter structure. The two or three body cast (forged) valve body is integrally filled with a letter. The leakage at the filling section is avoided. The middle flange seal adopts quantitative compression to avoid leakage.
Floating ball valves are widely used in silicon chemical industry, coal chemical industry, electric power, metallurgy, petroleum, petrochemical and other industries. They can achieve single or two-way sealing according to requirements. They have a long service life and good sealing performance in response to severe working conditions.
Silicon nitride coil supports
Silicon nitride coil supports are widely used as sensors in underground mining, geological exploration and other fields.
As the coil rack of the sensor coil, the silicon nitride coil rack mainly applies the ultra-high hardness performance of silicon nitride ceramics and the nonmagnetic insulation of silicon nitride ceramics. As the sensor coil rack, it must be insulated and nonmagnetic in order to accurately transmit the collected data; At the same time, as a sensor for depth exploration, the underground environment is generally complex, and only the support with high hardness can protect the sensor from damage. In addition, the silicon nitride support has certain protective effects on the sensor coil due to its anti-corrosion, high and low temperature resistance, and low coefficient of thermal expansion.
Silicon nitride bulletproof sheet
Silicon nitride bulletproof sheet is mainly used in bulletproof armor and spacecraft shell.
The ceramic armor system is composed of a single ceramic or ceramic metal composite and a nylon cloth layer (glass fiber can also be used) covered with high tensile strength organic fiber. Under the impact of bullets (speed>700), the ceramic front is broken, while the remaining energy is absorbed by the reverse soft reinforcement (such as nylon cloth layer), while the silicon nitride bulletproof sheet has high hardness, The high modulus can prevent it from deforming inwards when it is impacted by bullets, so that bullets cannot penetrate the bulletproof clothing, thus playing a protective role. At the same time, compared with metal bulletproof sheets, silicon nitride bulletproof sheets have the characteristics of close to zero porosity, low water absorption, low density, and difficult to produce oxides on the surface. For armored vehicles, in order to increase mobility, they have been looking for lightweight, while the silicon nitride density is less than 40% of the steel density.
