The service life of a sintering furnace’s inner lining directly affects the overall lifespan of the furnace. To evaluate the thickness and condition of the furnace lining, the following methods are commonly used:
1. Stress Wave Method
Stress wave signals are highly sensitive to structural defects. When stress waves propagate through a medium, discontinuities such as holes or cracks at the interface of the thick-film sintering furnace lining will cause reflection, refraction, scattering, and mode conversion. By analyzing these stress wave characteristics, the thickness of the cooling wall material can be determined.
2. Capacitance Method
Similar to the resistance method, the capacitance method involves embedding a coaxial circular capacitor sensor within the furnace lining. The measured capacitance is directly related to the length of the sensor, allowing the determination of the lining thickness.
Using these methods, preliminary assessments of the furnace lining’s basic data and performance can be made, providing an overall understanding of the sintering furnace’s operational status.