Industrial Ceramics Selection Guide | Dry Pressing vs. Hot Pressing, How to Choose Accurately?

2026-04-14

Content

1. Dry press molding: a standardized choice for efficient mass production
2. Hot press forming
1. Look at product performance requirements (primary decision)
2. Look at the product structure complexity
3. Look at the production batch size and cost
4. Look at the material system
5. Look at the usage conditions

In the field of high-end manufacturing and industrial precision components, Industrial ceramics Just because of it High temperature resistance, wear resistance, corrosion resistance, excellent insulation With irreplaceable properties, it has become a core material that can replace metals and plastics. The key to determining the final performance, cost and delivery time of ceramic components is, first of all, Molding process . Facing the mainstream of the market dry press molding with Hot press forming With the two major technical paths, how can B-side customers accurately select products based on their own product needs? This article provides you with an in-depth analysis of process principles, core features, applicable scenarios and selection logic.

1. Full analysis of the two major process principles and core characteristics

1. Dry press molding: a standardized choice for efficient mass production

process definition Dry press molding is normal temperature Next, add a small amount of binder (1%-5%) to the granulated ceramic powder, put it into a rigid mold, and pass it through Unidirectional/bidirectional axial pressure (10-100MPa) It is a traditional process of compacting into a blank and then densifying it through an independent sintering process.

2. Hot press forming

process definition Hot pressing is Integrated molding and sintering Advanced technology: in Vacuum / protective atmosphere , put the powder into a high-temperature resistant mold (mainly graphite), and apply it simultaneously High temperature (1400-2200℃) High pressure (20-40MPa) , the powder is rapidly densified in the thermoplastic flow, and nearly fully dense ceramics are formed in one step.

2. Dry Pressing vs Hot Pressing: Comparison Table of Core Dimensions

Contrast Dimensions	dry press molding	Hot press forming
Process principle	normal temperature轴压成型独立烧结	High temperature and high pressure synchronization, integrated molding and sintering
Density	90%-95% theoretical density	99%-99.9% theoretical density
Mechanical properties	Strength 300-450MPa, average toughness	Strength 550-1200 MPa, high toughness and high wear resistance
Shape adaptation	Simple structures (sheets, rings, columns, blocks)	Simple - medium complex, Performance first scene
Production efficiency	Extremely high (automated mass production)	Low (small batch/single piece customization)
comprehensive cost	Low (excellent mold, energy consumption, cycle time)	High (high costs for molds, equipment, and energy consumption)
Applicable materials	Alumina, zirconia, ordinary silicon carbide	Silicon nitride, high-density silicon carbide, zirconium boride and other special ceramics
Typical accuracy	±0.1%-±1%	±0.05%-±0.5% (post-processing can reach higher)

3. Five core judgment dimensions for selection decisions

1. Look at product performance requirements (primary decision)

Choose dry pressing: general industrial scenarios, medium requirements Strength, wear resistance, insulation, no extreme high temperature/high pressure/strong corrosion/high impact . Examples: ordinary mechanical bushings, insulating gaskets, conventional sealing rings, semiconductor structural parts.

Choose hot pressing: extreme performance scenarios, requirements Ultra-high strength, high toughness, near-zero porosity, ultra-wear and corrosion resistance, high temperature creep resistance . Examples: aerospace components, high-end cutting tools, oil drilling nozzles, automotive engine precision parts, bulletproof armor, semiconductor wafer suckers.

2. Look at the product structure complexity

Choose dry pressing: simple structure, regular and symmetrical, no deep cavity, thin wall, undercut, complex curved surface, wall thickness >1mm.
Choose hot pressing: the structure is moderately complex and the performance requirements are extremely high (hot isostatic pressing/injection molding is preferred for complex parts).

3. Look at the production batch size and cost

Choose dry pressing: large quantities of 100,000/million level, cost-sensitive, pursuing high cost performance and fast delivery.
Choose hot pressing: small batch / single piece / high-end customization (tens to thousands of pieces), regardless of cost

Maximize performance and lifespan .

4. Look at the material system

Choose dry pressing: 95%/99% alumina, stabilized zirconia, ordinary silicon carbide and other easy-to-sinter ceramics.
Choose hot pressing: silicon nitride, high-density silicon carbide, zirconium boride, transparent ceramics and other difficult-to-sinter, high-performance special ceramics.

5. Look at the usage conditions

Choose dry pressing: normal/medium temperature, low load, normal wear and tear, general corrosion, and no severe thermal or cold shock.
Choose hot pressing: high temperature >1200℃, high load, strong wear, strong corrosion, rapid cooling and rapid heating, high vacuum
Wait Harsh working conditions .

4. Summary: There is no good or bad process, adaptation is the best.

dry press molding Yes Efficient, low-cost, standardized mass production first choice, adaptation Large batch, simple structure, general performance Industrial ceramic parts are the mainstream basic technology in the current manufacturing industry. Hot press forming Yes Break through performance limits and cope with extreme working conditions hard-core solution to higher cost in exchange for Nearly fully dense, super strong mechanics, super long life , is the core choice for high-end manufacturing and special scenarios.

As a B-side supplier of industrial ceramics, we recommend that you: First clarify the five core requirements of product performance, structure, batch size, cost and working conditions, and then match the corresponding process .必要时可提供样品与技术方案，通过小批量试产验证，确保选型精准、性价比最优。

Choosing the correct molding process is to lay a solid foundation for your product's performance and cost.

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