Silicon carbide technology ceramics

Technical ceramics are formed by isostatic pressing process, combined with net size sintering and fine processing technology.

It is applied in industries such as metallurgy, chemical raw material processing, sealing, powder processing, automobiles, papermaking, aviation, aerospace, medicine, and food processing.

Silicon carbide technology ceramics: Advanced materials lead a new era of industrial wear resistance and high-temperature resistance

As industrial technology continues to advance towards high performance and high reliability, traditional metal materials are gradually showing signs of fatigue under extreme working conditions such as high temperatures, strong corrosion, and heavy loads. Silicon carbide technical ceramics, with their excellent hardness, thermal stability and corrosion resistance, have rapidly emerged in fields such as semiconductors, new energy, aerospace and metallurgy, becoming an indispensable new material choice in modern engineering manufacturing.

The editor of Heheng New Materials Technology will comprehensively analyze the core advantages, industry value and development trends of silicon carbide technical ceramics around key words such as "performance advantages of silicon carbide engineering ceramics", "Application of high-temperature silicon carbide ceramic products" and "Customization of precision silicon carbide ceramic components".

I. What is silicon carbide technology Ceramics?

Silicon carbide technology (SiliconCarbideTechnicalCeramics) based on SiC ceramic composition, through reaction sintering, such as pressure sintering, hot pressing sintering high performance ceramic material made of advanced technology, with high mechanical strength, wear resistance and thermal stability. It is a typical structural ceramic and also possesses functional properties such as electricity, heat and optics. It is a key basic material in modern high-end manufacturing.

Depending on different preparation processes, silicon carbide technology ceramics can be further classified into various types such as reaction-sintered silicon carbide (RBSiC), sintered silicon carbide (SSiC), and hot-pressed silicon carbide (HPSiC), and are widely used in the manufacturing of key components in harsh environments.

Ii. Overview of the Performance Advantages of Silicon Carbide Engineering Ceramics

The reason why it stands out among numerous ceramic materials is attributed to its unique physical, mechanical and chemical properties. The following are several key points of the performance advantages of silicon carbide engineering ceramics:

1. Ultra-high hardness and strength

With a Mohs hardness as high as 9.0 and a flexural strength of over 400MPa, it outperforms alumina ceramics and most metal alloys, making it suitable for extremely wear-resistant applications.

2. Good corrosion resistance

Even in complex environments such as strong acids, strong alkalis, and organic solvents, silicon carbide ceramics still exhibit excellent chemical stability and a service life far exceeding that of metal or plastic components.

3. High thermal conductivity and low coefficient of thermal expansion

Its thermal conductivity is higher than that of alumina and zirconia, which can effectively suppress thermal fatigue and thermal shock cracking, and is suitable for working environments with frequent cold and hot alternations.

4. High-temperature resistant

It can operate stably under high-temperature conditions above 1600℃ and is an ideal material for high-temperature furnace bodies, heating elements, nozzles and other components.

5. Stable electrical performance

It has good insulation or controllable conductivity and also has great potential in the fields of semiconductors and power electronics.

Based on the above advantages, silicon carbide technology ceramics are rapidly penetrating into multiple core industrial fields and becoming an important material support for industrial upgrading.

Iii. Expansion of Application Scenarios for High-temperature Silicon Carbide Ceramic Products

At present, the application of high-temperature silicon carbide ceramic products is showing a trend of extensive, diverse and in-depth development. The following are several typical fields:

1. Semiconductor equipment

It is widely applied in heat treatment devices such as wafer carriers, furnace tubes, diffusion tubes, and boats, featuring excellent thermal stability and ultra-clean characteristics, which can effectively enhance the yield of chips.

2. New energy batteries

It is applied in the synthesis reactors of lithium iron phosphate materials, high-purity powder mixing equipment and the inner linings of drying furnaces, etc., solving the problems of traditional metal pollution and deformation.

3. Aerospace

It is favored for its superior heat resistance and oxidation resistance compared to high-temperature alloys when used in components such as high-temperature nozzles, thermal insulation covers, and thermal protection systems.

4. Environmental protection and chemical industry

It is used in flue gas desulfurization nozzles, fluidized bed liners, acid and alkali storage tank stirring blades, mechanical sealing rings, etc., demonstrating an extremely long service life.

Therefore, the application of high-temperature silicon carbide ceramic products not only enhances the overall reliability of equipment but also becomes an important driver for energy conservation, consumption reduction and green manufacturing.

Iv. Trends in Customizing Precision Silicon Carbide Ceramic Components

With the increasing demand for industrial personalization and complexity, the customization of precision silicon carbide ceramic components is becoming an important development direction in the ceramic industry.

1. Precision customization

It can achieve dimensional tolerance control of less than 0.01mm, meeting the high requirements of high-end equipment for shape and position tolerance, flatness and concentricity.

2. Structural complexity

Through CNC machining, laser cutting, ultrasonic drilling and other means, complex parts such as multi-through holes, irregular grooves and thin-walled cavities can be manufactured.

3. Strong material selectivity

Different forming methods such as reaction sintering, pressure sintering and hot press sintering can be selected as needed to match the actual working conditions and budget.

4. Flexible small-batch customization

Supporting orders of up to 10 pieces, it meets the needs of R&D, small-scale trial production or equipment renovation, and is widely welcomed by new energy and high-end equipment manufacturing enterprises.

At present, the customized service of precision silicon carbide ceramic components is no longer merely about product supply, but has become part of a systematic solution, covering the entire chain from material selection, design, processing to assembly.

V. Future Trends: Silicon carbide Technology Ceramics Empower high-end Manufacturing

Looking ahead, with the accelerated development of strategic industries such as 5G, artificial intelligence, carbon neutrality policies, and new energy technologies, the requirements for the corrosion resistance, lightweight, insulation, and precision of materials are increasing day by day. Silicon carbide technology ceramics will continue to make efforts in the following directions:

High-purity upgrade: Meeting the requirements of the semiconductor and nuclear industries for extremely low impurity content;

Large-scale: Develop an integrated ceramic structure suitable for large-sized equipment;

Functional integration: Combined with silicon nitride and alumina to form multifunctional ceramics, enhancing thermal, electrical and mechanical properties;

The domestic production rate has increased: The domestic production of core processes, equipment and raw materials has accelerated, breaking foreign monopolies and reducing manufacturing costs.