Molybdenum disilicide (MoSi2) heating elements are essential components in a wide range of industries that require heating processes at extremely high temperatures. Their robustness, efficiency, and ability to operate in various atmospheres make them ideal for the following applications:

Ceramic and Refractory Industry

In the manufacture of advanced ceramics, porcelain, alumina, zirconia, and other refractory materials, MoSi2 heating elements are fundamental. They allow reaching the necessary sintering and firing temperatures to develop the desired mechanical and chemical properties in these materials. Their high-temperature stability ensures process uniformity and final product quality.

Glass Industry

MoSi2 heating elements are extensively used in the glass industry for processes such as melting, annealing, and forming. The ability to maintain high and stable temperatures is crucial for the production of high-quality glass, including optical glass, glass fibers, and display glass.

Metallurgy and Heat Treatments

In the metallurgical sector, these heating elements are vital for heat treatments of metals and alloys, sintering of metal powders, brazing, and casting processes. They facilitate the creation of components with improved properties, such as greater hardness, strength, and durability, in industries like automotive, aerospace, and tooling.

Magnetic and Electronic Materials

The production of magnetic materials (such as ferrites) and various high-tech electronic components often requires furnaces that operate at very high temperatures. MoSi2 heating elements provide the necessary controlled thermal environment for the synthesis and processing of these materials, ensuring their optimal performance.

Laboratories and Research Equipment

Due to their ability to generate and maintain extreme temperatures with precision, MoSi2 heating elements are widely used in research and development laboratories. They are key components in laboratory furnaces, vacuum furnaces, and test equipment for the study of new materials, process development, and high-temperature property characterization.

Physical Properties

Chemical Properties and Oxidation Resistance

MoSi2 heating elements exhibit high oxidation resistance at elevated temperatures. The formation of an SiO2 layer on the surface prevents continuous oxidation. However, it is crucial to avoid prolonged use in the 400-700°C range, as a phenomenon known as "pest" or low-temperature oxidation can occur, which can pulverize the element. Above 1710°C, the protective SiO2 layer can melt, which must be considered in the process design.

Maximum Operating Temperature According to Atmosphere

The maximum operating temperature of MoSi2 heating elements varies depending on the furnace atmosphere:

Element Surface Load (W/cm²)

The recommended surface load for MoSi2 heating elements decreases as the furnace temperature increases to ensure optimal lifespan and prevent overheating of the heating element:

To guarantee the performance and durability of your MoSi2 heating elements, follow these recommendations:

•       Vertical Installation: Above 1250°C, vertical installation is mandatory to prevent bending deformation. Although horizontal installation is common at lower temperatures, verticality is key for high-temperature stability.

•       Electrical Connection: Due to their low cold resistance, MoSi2 heating elements require low-voltage, high-current transformers. Ensure the transformer is as close as possible to the heating element to minimize energy losses.

•       Lifespan and Maintenance: MoSi2 heating elements have a long lifespan in continuous use. However, avoid rapid cooling below 1000°C, as this can cause cracking or detachment of the protective SiO2 layer, significantly reducing the element's lifespan.

•       Adequate Spacing: Maintain a distance between elements no less than 3 times the terminal diameter and a distance to the furnace wall no less than 2 times the element diameter to ensure uniform heat distribution and prevent interference.

•       Furnace Drying: Before using a new furnace or one that has been inactive, perform drying at 100-200°C. This is crucial for furnace preparation and optimization of heater performance.