Why Choose Alumina Ceramic Tubes for Exceptional Thermal Shock Resistance?
Recently, with the continuous innovation of industrial technology, in many fields with strict requirements for material performance, alumina ceramic tubes with excellent thermal shock resistance have stood out and become the new favorite in the industry. Thanks to their outstanding performance in extreme temperature environments, this new type of material is quietly changing the pattern of material applications in multiple industrial scenarios.
Excellent performance, breaking through traditional limitations
Compared with traditional pipe materials, alumina ceramic tubes exhibit unparalleled advantages in terms of thermal shock resistance. It can continuously withstand high-temperature working conditions of 1680°C, and its thermal shock stability is 6.2 times higher than that of traditional metal pipes. The measured data of a coking enterprise show that in a sulfur-containing flue gas environment at 650°C, the alumina ceramic tubes can operate continuously for 13,400 hours without any loss. In addition, its thermal conductivity coefficient reaches 28W/(m·K), which can help improve the energy efficiency of the heat exchange system by 51%, significantly optimizing the energy utilization efficiency.
This outstanding performance stems from the special microstructure and composition design of alumina ceramics. Thermal shock resistance is closely related to the mechanical strength, elastic modulus, coefficient of thermal expansion, and other properties of the material. By adding secondary phases such as zirconia and silicon carbide, alumina ceramics reduce their own coefficient of thermal expansion, improve thermal conductivity and fracture toughness, effectively relieve the thermal stress generated during thermal shock, and inhibit the propagation of cracks, thus possessing excellent thermal shock resistance.
Widely applicable, empowering the development of multiple industries
In the field of aerospace, materials need to withstand extremely high temperatures and thermal shocks. Thanks to its excellent thermal shock resistance, the alumina ceramic tube meets the relevant requirements and ensures the stable operation of key components of spacecraft. In industrial production, its applications are also widespread. In the pneumatic ash conveying system of coal-fired power plants, after the alumina ceramic tubes with the specification of DN200 is put into use, the wear rate has decreased from 3mm per thousand hours to 0.05mm per thousand hours, which has greatly reduced the equipment maintenance cost and downtime. The alumina ceramic tubes supporting the silicon carbide crystal growth equipment can withstand the chlorine gas environment at 1600℃, and its service life has exceeded the mark of 8000 hours, providing strong guarantee for the continuity and stability of production.
Technological innovation promotes industrial upgrading
Domestic enterprises have mastered the isostatic pressing forming technology through independent research and development, enabling the bending strength of alumina ceramic tubes to reach 605 MPa. They have also uniquely developed a metal-ceramic composite connection process, which increases the installation efficiency by 70% compared to the international standard. The patent titled "A Ceramic Lifting Tube for Vacuum Low-Pressure Casting of Superalloys and Its Preparation Method" applied by Liaoning Light Industry Science Research Institute Co., Ltd. uses an alumina matrix to manufacture a ceramic lifting tube with excellent thermal shock resistance. Moreover, this lifting tube does not react with the superalloy molten metal during the casting process, ensuring the purity of the molten metal. At the same time, the production process is simple, enabling low-cost and large-scale production.
With the continuous advancement of technology and the continuous expansion of applications, alumina ceramic tubes with excellent thermal shock resistance are expected to play an important role in more fields and inject new vitality into the high-quality development of the industry.