Therser UK Blog

Why is Silicon Carbide popular in Kilns


  1. High temperature stability: Silicon carbide has excellent thermal stability and can withstand extremely high temperatures. It can maintain its structural integrity even at temperatures above 1,600°C (2,912°F). This makes it suitable for use in kilns, which often operate at high temperatures.

  2. High thermal conductivity: Silicon carbide has a high thermal conductivity, which means it can effectively transfer heat. This property allows for efficient heat distribution within the kiln, ensuring uniform temperature distribution and reducing hotspots.

  3. Low thermal expansion: Silicon carbide has a low coefficient of thermal expansion, which means it expands and contracts minimally with changes in temperature. This characteristic helps to minimize thermal stress and prevents cracking or damage to the kiln structure during heating and cooling cycles.

  4. Chemical inertness: Silicon carbide is highly chemically inert, meaning it does not readily react with most chemicals or gases. This property is particularly beneficial in kiln applications where corrosive or reactive substances are present. Silicon carbide can withstand exposure to acids, alkalis, and other harsh chemicals without significant degradation.

  5. Mechanical strength: Silicon carbide is a very hard and durable material with excellent mechanical strength. It can withstand mechanical stresses, such as weight loads or vibrations, without easily breaking or deforming. This strength is crucial for maintaining the structural integrity of the kiln during operation.

  6. Abrasion resistance: Silicon carbide is highly resistant to wear and abrasion, making it suitable for kiln applications where there may be contact between the material being processed and the kiln lining. It can withstand the erosive effects of abrasive materials and extend the lifespan of the kiln lining.


Overall, the combination of high temperature stability, thermal conductivity, low thermal expansion, chemical inertness, mechanical strength, and abrasion resistance makes silicon carbide a reliable and efficient material for kilns. It helps to ensure proper heat transfer, temperature control, and long-term durability in various industrial processes, such as ceramics manufacturing, metal heat treatment, and glass production.

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