Can wear-resistant ceramic pipes withstand high temperatures? What is the temperature range?
With the development of science and technology, especially the development of energy and space technology, materials need to be used under harsh conditions. For example, the channel materials for magnetic fluid power generation must be able to withstand high temperatures and withstand the erosion and corrosion of high-temperature and high-speed airflow. The development of space technology (such as spacecraft nozzles, combustion chamber linings, etc.) has placed increasingly higher requirements on materials. Reaction devices and heat exchangers in petrochemical industry, energy development and other fields have increasingly strict requirements on high temperature resistance, corrosion resistance and wear resistance of materials. It can be seen that high-temperature structural ceramics are becoming more and more important, and the demand for their varieties is also increasing day by day.
The heat resistance of wear-resistant ceramics is mainly measured from three aspects:
1. Thermal strength performance and mechanical performance indicators;
2. Thermal fatigue performance, tolerance index of hot and cold changes;
3. High temperature corrosion resistance, medium corrosion tolerance under high temperature conditions.
Our wear-resistant ceramics are sintered in a kiln at 1500℃-1700℃. They have excellent high temperature resistance and can operate at temperatures of more than 1000 degrees without any pressure. However, wear-resistant ceramic pipes are composed of three parts: ceramic lining, adhesive and outer steel pipe. The heat-resistant performance cannot only consider ceramics, but also need to consider the thermal expansion coefficient of the steel pipe and the high-temperature resistance of the adhesive.
Under normal circumstances, ordinary adhesives can withstand high temperatures around 200°C, and special adhesives can withstand temperatures around 350°C, which limits the high temperature resistance of wear-resistant ceramic pipes.
In order to weaken the limitations of the adhesive's temperature resistance on wear-resistant ceramic pipes, we can use one-piece ceramic pipes or dovetail slots and other mechanical self-locking structures to make ceramic pipes based on the actual situation.
Generally speaking, the temperature resistance of wear-resistant ceramic tubes is between -20°C and 1000°C. Above 1000°C, the brittleness of the ceramic itself will also increase rapidly. Therefore, during normal use, the temperature should be controlled within 1000°C.
