High-Temperature Applications in Focus: Understanding and Preventing Spalling on MoSi₂ Heating Elements

High-Temperature Applications in Focus: Understanding and Preventing Spalling on MoSi₂ Heating Elements

Modern high-temperature processes must meet the most demanding requirements under extreme conditions. When operating molybdenum disilicide (MoSi₂) heating elements, one recurring issue—regardless of the manufacturer—is spalling.

A common cause: reducing atmospheres, which prevent the formation of a new protective SiO₂ layer on the element surface.

✅ Our recommended solutions if spalling occurs:

1. Clean your kiln/furnace with a vacuum cleaner.
2. Perform a regeneration firing under an oxidizing atmosphere at 1450 °C for 5 hours – without any product in the furnace.

In general, the use of heating elements with a thicker SiO₂ protective layer can be considered in reducing atmospheres. We’re happy to advise you on the right option!

Looking to optimize your high-temperature processes? Get in touch – we’re here to support you with expertise and tailored solutions.