Manufacturing Technique - Yixing Minghao Special Ceramic Technology Co., Ltd.

Hot Pressing Technology in Industrial Ceramics Production‌

Hot pressing is a advanced consolidation technique widely used in industrial ceramics manufacturing, utilizing simultaneous application of heat and pressure to achieve high-density ceramic components. This process involves placing ceramic powder or pre-formed green bodies into a die within a high-temperature press, where elevated temperatures (typically ranging from 1000°C to 2000°C depending on material) and uniaxial pressure (often 10–50 MPa) are applied to facilitate rapid densification through solid-state sintering. The combined thermal and mechanical action promotes particle rearrangement, diffusion bonding, and pore elimination, resulting in materials with exceptional mechanical strength, low porosity, and superior microstructure homogeneity.

Compared to conventional sintering methods, hot pressing offers significant advantages such as reduced processing time, lower sintering temperatures, and enhanced control over grain growth and phase composition.

Dry Pressing Technology in Industrial Ceramics Production‌

Dry pressing is a widely used forming method in industrial ceramics manufacturing, where dry ceramic powder is compacted into a solid green body under high uniaxial pressure within a rigid die. This process involves preparing granular powder with controlled moisture content (typically <5%) and particle size distribution to ensure excellent flowability and moldability. The powder is fed into the die cavity, and pressure (ranging from 10 to 100 MPa) is applied to achieve uniform consolidation, resulting in dense and dimensionally accurate components.

Compared to wet forming techniques, dry pressing offers advantages such as faster production cycles, lower energy consumption, and minimal post-processing due to reduced shrinkage and warpage. It is particularly suitable for producing simple or moderately complex shapes, including tiles, insulators, and wear-resistant components, with high reproducibility and mechanical strength.

Isostatic Pressing Technology in Industrial Ceramics Production‌

Isostatic pressing is a advanced forming technique used in industrial ceramics manufacturing, where ceramic powder or pre-formed green bodies are subjected to uniform hydrostatic pressure from all directions in a fluid medium (typically water or oil). This process can be performed in two modes: cold isostatic pressing (CIP) for green body consolidation at room temperature, or hot isostatic pressing (HIP) for simultaneous sintering and densification at elevated temperatures. The application of omnidirectional pressure ensures homogeneous particle packing, minimizes internal defects, and produces components with exceptional density, mechanical strength, and dimensional accuracy.

Compared to uniaxial pressing methods, isostatic pressing offers superior uniformity in complex geometries, reduced anisotropic shrinkage, and enhanced material properties. It is particularly suitable for producing high-performance ceramics such as alumina, zirconia, and silicon nitride, which require minimal porosity and high reliability for applications in aerospace, medical implants, and energy storage systems. The ability to achieve near-net-shape components with minimal post-processing makes it a critical technology for demanding industrial sectors.

CNC Machining Technology in Industrial Ceramics Production‌

CNC (Computer Numerical Control) machining is a precision subtractive manufacturing process widely employed in industrial ceramics for shaping high-performance materials into complex components with tight tolerances. This technique involves using computer-controlled tools, such as diamond-coated end mills or laser cutters, to remove material from pre-sintered or fully sintered ceramic blanks. The process is particularly suited for hard and brittle ceramics like alumina, zirconia, and silicon carbide, which are challenging to form using traditional methods.

Key advantages include exceptional dimensional accuracy (typically within ±0.01 mm), the ability to produce intricate geometries , and minimal material waste compared to additive methods. CNC machining is often used for post-processing after sintering to achieve final surface finishes, hole drilling, or thread cutting. It is critical for applications requiring high precision, such as medical implants, aerospace components, and semiconductor equipment, where surface integrity and mechanical performance are paramount.

By integrating advanced CAD/CAM software, CNC machining enables rapid prototyping and mass production of ceramic parts with repeatable quality, making it indispensable in modern industrial ceramics manufacturing.