Silicon carbide pressureless sintering furnace

Silicon carbide pressureless sintering furnace is an equipment used for sintering silicon carbide (SiC) ceramic materials under normal or low pressure environment. Unlike hot pressing sintering, pressureless sintering does not require external pressure and mainly relies on high temperature to promote material densification.

main features 

Pressure free environment: The sintering process is carried out under normal pressure or low pressure, without the need for additional pressure.
High temperature sintering: The temperature is usually between 1800 ° C and 2200 ° C to ensure sufficient densification of silicon carbide.
Inert atmosphere: Inert gases such as argon or nitrogen are commonly used to prevent material oxidation.
Accurate temperature control: equipped with advanced temperature control system to ensure temperature uniformity and stability.
High purity furnace: The furnace material is high-purity graphite or ceramic to avoid pollution.

application area 

Ceramic material: used for sintering silicon carbide ceramics, suitable for high temperature, wear-resistant, and corrosion-resistant environments.
Electronics industry: Manufacturing silicon carbide substrates in semiconductor devices.
Aerospace: Production of high-temperature resistant and high-strength silicon carbide composite materials.
Mechanical manufacturing: Manufacturing high hardness and wear-resistant mechanical components.

advantage

Simplified process: No need for complex pressure equipment, easy to operate.
Cost effectiveness: Low equipment and maintenance costs.
Material properties: Sintered products have high density and excellent performance.

The composition and structure of the silicon carbide pressureless sintering furnace mainly include the following parts:

furnace body
Shell: usually made of stainless steel or carbon steel, with good mechanical strength and corrosion resistance.
Insulation layer: made of ceramic fibers or graphite materials, used for insulation and reducing heat loss.
Heating system
Heating element: Graphite or molybdenum is commonly used as the heating element, which can withstand high temperatures.
Power system: Provides electrical energy to ensure the proper functioning of heating elements.
temperature control
Thermocouple: used for real-time monitoring of the temperature inside the furnace.
Temperature control instrument: Adjust the heating power based on thermocouple feedback to maintain temperature stability.
Atmosphere control system
Gas supply system: Provide inert gases (such as nitrogen, argon) or reducing gases (such as hydrogen) to prevent material oxidation.
Gas flow meter: Adjust the gas flow rate to ensure a stable atmosphere inside the furnace.
Cooling system
Water cooling system: By circulating water to cool the furnace body and heating elements, overheating is prevented.
Air cooling system: Some equipment is equipped with fans to accelerate the cooling process.
loading system
Material rack: used to place silicon carbide products to be sintered.
Material cart: convenient for loading and unloading material racks, improving operational efficiency.
control system
PLC control system: Automatically controls the entire sintering process, including temperature, atmosphere, and cooling.
Human machine interface: Operators monitor and adjust parameters through touch screens or computers.
security system
Pressure sensor: monitors the pressure inside the furnace to prevent abnormalities.
Alarm system: issues an alarm when temperature, pressure, or gas flow is abnormal to ensure safety.

These parts work together to ensure the efficient and stable operation of the silicon carbide pressureless sintering furnace

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