Silicon Carbide Sagger

High temperature resistant silicon carbide sagger

 

Silicon carbide sagger is a high-performance kiln made of reaction-sintered silicon carbide ceramics. It has excellent high temperature resistance (≤1380℃), rapid cooling and heating resistance, acid and alkali corrosion resistance, and high hardness, oxidation resistance and long service life. Its high thermal conductivity is significantly better than other corrosion-resistant materials, which can reduce the heat exchange area and equipment volume, reduce the cost of use, and is widely used in pharmaceutical, chemical, metallurgical, pickling and metal smelting fields.

 

In terms of structural design, silicon carbide sagger optimizes traditional processes through split-type card connection technology, such as the use of trapezoidal card slots, spring compression components and removable side wall panels, which realizes rapid assembly and maintenance, and solves the problem of complex splicing and low efficiency of traditional saggers. This kind of innovative design not only improves the structural stability in high temperature environments, but also reduces transportation and manufacturing costs, making it an ideal choice for modern industrial high temperature processing equipment.

 

Silicon carbide sagger structure design drawing

 

Physical properties of silicon carbide sagger

 

Performance Indicators	Value or description
density	3.10 - 3.20 g/cm³
hardness	Mohs hardness 9.5, second only to diamond
Compressive strength	2000 - 2500 MPa
Bending strength	400 - 500 MPa
Coefficient of thermal expansion	4.0 - 4.5 × 10⁻⁶ /K(Room temperature to 1000℃)
Thermal conductivity	120 - 150 W/(m·K)
Heat resistance	Can withstand high temperatures above 1600℃
Antioxidant	Good antioxidant properties at high temperatures
Corrosion resistance	Acid and alkali corrosion resistance, high chemical stability
Wear resistance	Very high, suitable for high wear environments

 

What are the precautions when using silicon carbide sagger?

 

1. Temperature control: When heating, heat slowly to avoid sudden temperature changes that cause cracking, and do not use it at overtemperature for a long time.
2. Even loading: The material should be evenly distributed to avoid local overheating or uneven force, and do not overload.
3. Timely cleaning: Clean the residue in time after use to avoid chemical corrosion. Use soft tools when cleaning to prevent scratches.
4. Handle with care: Be careful when transporting and storing, avoid collisions, and keep the storage environment dry.
5. Inspection and maintenance: Check regularly for cracks or wear, and replace damaged saggers in time.
6. Pay attention to the atmosphere: Avoid strong reducing atmospheres, and control the atmosphere in the furnace to prevent unnecessary chemical reactions.

 

What are the advantages of silicon carbide saggers compared with other saggers?

 

Silicon carbide saggers have significant advantages over traditional saggers (such as clay saggers or alumina saggers). First, they have excellent high temperature resistance and can withstand temperatures up to 1380°C. They are also highly resistant to thermal shock and are not prone to cracking. Secondly, silicon carbide saggers are hard and corrosion-resistant, and can resist acid and alkali erosion, extending their service life. In addition, their high thermal conductivity can improve heating efficiency, reduce energy consumption, and reduce production costs.

 

In contrast, traditional saggers are easily deformed or damaged at high temperatures, and have poor corrosion resistance and need to be replaced frequently. Silicon carbide saggers are an ideal choice for high-temperature industrial fields such as pharmaceuticals, chemicals, and metallurgy due to their durability and efficiency.

Saggers and crucibles

 

Three major usage scenarios of silicon carbide saggers

 

• Pharmaceutical industry: During the high-temperature calcination and drying process of drugs, silicon carbide saggers can stably carry drug raw materials, avoid pollution, and ensure the purity of drugs due to their high temperature and corrosion resistance.
• Chemical industry: used as chemical reaction containers or catalyst carriers in strong acid and strong alkali environments, its excellent corrosion resistance can effectively extend the life of equipment and reduce maintenance costs.
• Metal smelting: During high-temperature smelting and casting, silicon carbide saggers can withstand extreme temperature changes, avoid cracking or deformation, and ensure the quality and production efficiency of metal materials.

 

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