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Industrial Ceramic Cooling Crack Control: Analysis of the Impact of Programmed Phased Cooling Rate on Structural Stress Release

2026-03-31

Industrial Ceramic Cooling Crack Control: Analysis of the Impact of Programmed Phased Cooling Rate on Structural Stress Release

1. Industry Background: The Neglected "Second Half" — Cooling Safety

In the sintering process of precision ceramics (such as large-size zirconia structural parts and thick-walled alumina ceramics), enterprises often focus on the heating and heat preservation stages. However, statistics show that more than 60% of micro-cracks and product deformation occur during the cooling stage. If the cooling rate is out of control, the huge thermal stress generated inside and outside the ceramics will exceed the fracture toughness of the material. Therefore, equipment with "programmable and controllable cooling" capability is the key to ensuring a high yield rate.

2. In-Depth Technical Analysis: How to Achieve "Phased" Precise Cooling

Achieving high-quality cooling requires in-depth coordination between the mechanical structure and the control system.

Phased cooling logic: In the high-temperature zone (1600℃ ~ 1200℃), the material is still in a micro-plastic state, and natural heat dissipation of the furnace body is required; while in the medium and low-temperature zone (below 1000℃), controlled cold air needs to be introduced.
Variable frequency fresh air system: The KYN-ZS-TS-500 is equipped with an adjustable speed fresh air supply device. Through the frequency converter to accurately adjust the air volume, combined with the program-set cooling curve, an extremely slow cooling rate can be achieved, ensuring that the grain boundary stress inside the ceramics is fully released.
Dual-screw lifting and sealing: The furnace mouth adopts a multi-step concave-convex sealing structure. At the end of cooling, the furnace bottom gap can be micro-adjusted through the dual-screw mechanism, which can achieve physical auxiliary heat dissipation without generating local cold spots.

3. Selection Guide: 3 Core Parameters for Evaluating Cooling Control Capability

When purchasing industrial-grade sintering furnaces, it is recommended to evaluate their crack control capability from the following technical details:

3.1 Programmability of Cooling Curve

Parameter Basis: The equipment should support at least 30 or more program segments. The British Eurotherm instrument adopted by the KYN-ZS-TS-500 supports complex PID cooling parameter tuning, allowing users to set different slopes in different temperature intervals to avoid "cliff-like" cooling.

3.2 Thermal Inertia of Furnace Insulation Material

Parameter Basis: The furnace lining should be made of materials with small heat storage capacity. The "high-purity microporous ceramic material" used in this scheme, combined with alumina fiber, ensures temperature field uniformity and has low thermal inertia. This means that the equipment has an extremely fast response to the control system and can follow the set cooling curve in real time.

3.3 Shell Temperature Rise and Operation Safety

Parameter Basis: Excellent cooling design not only protects products but also protects operators. The furnace outer wall temperature rise of the KYN-ZS-TS-500 is controlled within ≤ ambient temperature +40℃. This not only reflects the thermal insulation performance but also indirectly proves the scientific design of its heat emission path, preventing disorderly accumulation of heat in the workshop.

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Industrial Ceramic Cooling Crack Control: Analysis of the Impact of Programmed Phased Cooling Rate on Structural Stress Release

Industrial Ceramic Cooling Crack Control: Analysis of the Impact of Programmed Phased Cooling Rate on Structural Stress Release

1. Industry Background: The Neglected "Second Half" — Cooling Safety

2. In-Depth Technical Analysis: How to Achieve "Phased" Precise Cooling

3. Selection Guide: 3 Core Parameters for Evaluating Cooling Control Capability

3.1 Programmability of Cooling Curve

3.2 Thermal Inertia of Furnace Insulation Material

3.3 Shell Temperature Rise and Operation Safety