LUOYANG, China — TRUNNANO, a leading global supplier of advanced ceramic materials and nanomaterials, has announced significant breakthroughs across its silicon carbide product portfolio, including advances in reaction sintered silicon carbide (SiSiC) manufacturing and the successful mass production of Silicon Carbide Whiskers (SiC Whiskers). The company also offers Aluminum Silicon Carbide (AlSiC) metal matrix composites for thermal management and lightweight structural applications. Following years of technological development and process optimization, the company has successfully overcome multiple technical challenges that have historically constrained the performance and reliability of these advanced materials, providing more stable and cost-effective ceramic solutions for extreme operating conditions requiring high temperature resistance, high strength, and wear resistance. In addition, the company continues to supply high-quality Silicon Carbide Ceramic SiC Balls for grinding, sealing, and high-temperature wear applications.
Reaction sintered silicon carbide is an advanced engineering ceramic densified through a unique "reaction bonding" process, integrating core technologies from materials science, high-temperature physics, and precision engineering. Unlike conventional sintering methods, the reaction bonding process achieves near-net-shape forming with minimal shrinkage, enabling the production of complex, dimensionally precise components with reduced post-processing requirements.
Silicon Carbide SeriesKey Technical Breakthroughs in SiSiC Manufacturing
During the preparation of reaction sintered silicon carbide, the TRUNNANO R&D team successfully overcame several key process challenges: optimizing the raw material ratio and skeleton structure design, controlling silicon infiltration and reaction during high-temperature reaction sintering, and controlling the free silicon content while balancing overall material performance.
Raw Material Ratio Optimization
The ratio and uniformity of silicon carbide powder and high-purity carbon powder directly determine the microstructure and performance stability of the final product. By incorporating advanced powder processing and mixing techniques, TRUNNANO achieves uniform dispersion of the raw materials at the nanoscale level, constructing a carbon/silicon carbide composite skeleton with well-defined porosity distribution and high strength. This foundational step ensures consistent material properties and reliability across production batches.
The company's expertise in nanomaterials, supported by a comprehensive product portfolio that includes beta-phase silicon carbide powders with a range of particle sizes and high purity levels, provides a critical advantage in achieving this level of raw material control. These high-purity silicon carbide powders serve as the foundational raw materials for producing advanced ceramic components like SiSiC.
High-Temperature Reaction Sintering Control
Reaction sintering is the most critical and challenging step in SiSiC preparation. TRUNNANO utilizes a proprietary high-temperature sintering system, precisely controlling the temperature within a defined high-temperature range under vacuum or inert atmosphere. This ensures that molten silicon uniformly penetrates the pores of the green body through capillary action and undergoes a thorough in-situ reaction with carbon (Si + C → β-SiC).
This process not only achieves near-complete densification of the material but also securely bonds the original silicon carbide particles through the newly formed beta-phase silicon carbide, forming a ceramic body with high strength and hardness.
Free Silicon Content Control
Reaction-sintered silicon carbide inevitably contains a small amount of free silicon, whose content directly affects the material's high-temperature performance and corrosion resistance. By optimizing the carbon-silicon ratio and siliconizing process, TRUNNANO maintains a stable free silicon content within an optimal range and ensures its uniform distribution throughout the material. This ensures high density, hardness, and excellent thermal conductivity while minimizing the impact on high-temperature performance and chemical stability.
SiSiC manufacturing process — precise high-temperature control.
Product Performance Characteristics
The technical breakthroughs achieved by TRUNNANO are reflected in the exceptional performance characteristics of its reaction bonded silicon carbide products. The material demonstrates high silicon carbide content, excellent density with minimal porosity, and outstanding flexural strength that remains consistent even at elevated temperatures. With exceptional hardness and high thermal conductivity, the material delivers reliable performance in the most demanding mechanical, thermal, and chemical environments. Its outstanding thermal shock resistance makes it an ideal candidate for applications ranging from semiconductor equipment components to high-temperature kiln furniture.
SiSiC performance characteristics — exceptional hardness and thermal stability.
Applications in Extreme Industrial Environments
The unique combination of features makes reaction bonded silicon carbide indispensable across a wide range of demanding industries:
High-Temperature Kiln & Thermal Equipment — The largest application area. Used for rollers, beams, rails, setters, and saggers in furnaces for ceramics, lithium battery materials, and magnetic materials. The material's high thermal conductivity and low thermal expansion ensure dimensional stability during rapid temperature changes.
Wear & Seal Components — Ideal for mechanical seal rings, wear-resistant liners, and nozzles in mining, power, and pump industries. With outstanding hardness, SiSiC components provide superior wear resistance and extended service life in abrasive environments. Silicon carbide ceramic balls are a typical product form in this category, widely used as grinding media, bearings, and wear-resistant components in high-temperature and corrosive environments.
Chemical Industry — Suitable for pumps and valve components that handle corrosive media with particulate matter. The material offers excellent corrosion resistance to most acids, alkalis, and salt solutions.
Semiconductor Industry — Employed in high-purity fixtures, paddles, and boats for wafer processing. The material's high strength and dimensional stability make it suitable for demanding semiconductor manufacturing environments.
SiSiC applications — from semiconductor equipment to high-temperature kiln furniture.
Product Portfolio Extension: Silicon Carbide Whiskers
Building on its SiSiC breakthrough, TRUNNANO has also achieved successful mass production of Silicon Carbide Whiskers (SiC Whiskers), featuring high aspect ratio, high purity, exceptional hardness, and superior thermal stability. These whiskers are a separate product line—used as a reinforcing material for ceramic matrix composites, metal matrix composites, and high-performance coatings—distinct from SiSiC components but leveraging the same core silicon carbide technology platform.
The technical team has overcome two core challenges:
Precise Control of Whisker Aspect Ratio and Length Distribution — By optimizing catalyst formulations, synthesis temperatures, and gas flow control parameters, TRUNNANO has successfully produced beta-phase silicon carbide whiskers characterized by consistent length distribution, uniform diameters, and complete crystal structures.
Processing Flowability and Interfacial Defects in High-Filler-Content Systems — By precisely controlling the thickness and grafting density of the surface modification layer on the whiskers, the technical team has successfully optimized their interfacial compatibility with various matrices—including epoxies, ceramic precursors, and metal powders. Test results demonstrate that, at equivalent filling ratios, the modified silicon carbide whiskers result in reduced system viscosity while simultaneously enhancing the flexural strength and fracture toughness of the composite materials.
The silicon carbide whisker products are available with various surface modification schemes—including unmodified, KH570-modified, and amino-modified options—to satisfy the application demands of diverse matrix systems.
Silicon carbide whiskers (SiCw) — high aspect ratio reinforcement material.Management Perspective
Roger Luo, CEO of TRUNNANO, commented on the significance of these achievements: "We are committed to promoting the industrialization and innovation of high-performance structural ceramics. Reaction-sintered silicon carbide not only offers excellent overall performance but also demonstrates unique advantages in near-net-shape forming and dimensional control, making it a key area of focus for TRUNNANO's continued development in the high-performance ceramics field."
"These technological breakthroughs mark a new level of reliability and consistency in our high-performance structural ceramics. We will continue to advance the applicability of reaction-sintered silicon carbide in a wider range of industrial scenarios, helping customers upgrade their equipment and improve efficiency."
Regarding the silicon carbide whisker launch, Luo added: "We remain steadfast in our customer-centric approach, continuously driving technological innovation to enhance product performance. The mass production of silicon carbide whiskers marks a solid step forward for us in the field of high-end composite reinforcement materials."
Supplier
TRUNNANO is a globally recognized advanced ceramics manufacturer and supplier with more than 12 years of expertise in high-quality nanomaterials, advanced ceramic materials, and high-purity chemicals. The company develops a variety of powder materials and ceramic components, and offers OEM services. If you need high-quality reaction bonded silicon carbide (SiSiC) or other advanced ceramic products, please feel free to contact us. You can click on the product to contact us.
Tags: reaction bonded silicon carbide, SiSiC, silicon carbide whisker, advanced ceramics, semiconductor materials, high-temperature ceramics, industrial ceramics, silicon carbide powder, silicon carbide balls,aluminum silicon carbide
