Silicon Nitride Tubes

Semicorex Silicon Nitride Tubes are engineered to provide an elite level of protection and durability where traditional materials like alumina, quartz, and cast iron fail. With the developing of modern scientific technology, the using condition of the components are more and more serious, such as high-temperature, strong corrosion. So it places higher demands on the research and application of new materials. The traditional metal material is hard to meet the material specifications requirement of current developing technology, with its weakness of poor high-temperature resistance and corrosion resistance. Therefore, new materials are urgently needed. Because ceramic materials can overcome the shortcomings of traditional materials, they have attracted increasing attention from researchers. Through hard work, great progress has been made in the research on the preparation process and performance of ceramics, especially the superior performance of Si3N4 ceramics, which has been widely recognized.

Silicon Nitride Tubes is a very crucial structural material, it is a high hardness substance, it is also with lubricating and wear-resistant properties; except for hydrofluoric acid, it does not react with other inorganic acids, has strong corrosion resistance, and is resistant to oxidation at high temperatures. Moreover, it can withstand thermal shocks; it will not shatter even if heated to over 1000°C in the air, then rapidly cooled and then rapidly heated again.

The superior properties of Silicon Nitride Tubes make them particularly valuable in the high-temperature, high-speed, and highly corrosive working environments frequently encountered in modern technology. This has led to their application in numerous fields and many potential uses. In the machinery industry, they are used as turbine blades, high-temperature bearings, and high-speed cutting tools; in the metallurgical industry, they are used as components in thermal equipment such as crucibles, burners, and aluminum electrolysis cell linings; in the chemical industry, they are used as corrosion-resistant and wear-resistant parts, such as ball valves, pump bodies, and burner vaporizers; and in the semiconductor, aerospace, and nuclear energy industries, they are used as thin-film capacitors, high-temperature insulators, radar radomes, supports and separators in nuclear reactors, and carriers of nuclear fission materials.

Performance Parameters

Density (g/cm3) >3.2g/cm3

Apparent Porosity (%) <0.3%

Rockwell Hardness (HRA) >93

Maximum Service Temperature in Air (°C) 1400

Maximum Service Temperature in Protective Atmosphere (°C) 1800

Surface Energy at Break (20°C)/(J/m2) 133

Flexural Strength (MPa) 986 (20°C), 485 (1400°C)

Specific Heat (J/g·K) 0.71

Poisson's Ratio (20°C) 0.290

Thermal Conductivity [W/(m·K)] 28.8

Thermal Diffusivity (300°C)/(cm2/s) 0.690

Resistivity (Ω·m) 1.4x10⁵(20℃), 4x10⁸(1050℃)