Niobium tubes are tubular profiles made of pure niobium or niobium alloys (such as tantalum-niobium alloys, niobium-titanium alloys, etc.). Relying on the core properties of niobium itself, such as high melting point, excellent low-temperature superconductivity, good corrosion resistance and biocompatibility, they play an irreplaceable role in high-end fields such as aerospace, electronics, medical care and chemical engineering.
The melting point of niobium is as high as 2468°C, and it still maintains good mechanical properties at high temperatures. At the same time, it has excellent radiation resistance stability against radiation. Therefore, niobium tubes (mostly pure niobium or high-strength niobium alloy tubes) are key structural/functional components in extremely high-temperature and irradiation environments. Thermal control system conduits used in satellites and space stations can transfer the high-temperature heat inside the spacecraft to the heat dissipation components, while resisting the extreme temperature differences (-270°C to 1000°C) and high-energy particle erosion in space, ensuring the stable operation of the thermal control system.
Pure niobium and niobium alloys (such as niobium-titanium alloy and niobium-tin alloy) are typical low-temperature superconducting materials (the superconducting critical temperature of pure niobium is approximately 9.25K, that is, -263.9 °C), and niobium has a low resistivity (about 15.2μΩ · cm at room temperature) and a stable temperature coefficient of resistance. Therefore, niobium tubes are mainly used in the electronics field for superconducting devices and high-precision conductive components.
High-precision electronic components: Ion implantation target material support tubes and high-temperature thermocouple protection tubes used in semiconductor manufacturing. For instance, in the chip ion implantation process, niobium tubes can stably support the target material and are resistant to high-frequency ion bombardment. In high-temperature measurement scenarios (such as below 1500°C), niobium tubes are used as protective sleeves for thermocouples to prevent the measuring elements from being corroded by high-temperature gases while ensuring the accuracy of signal transmission.
