LUOYANG, China, Jan. 12, 2026 — TRUNNANO, a global leader in advanced ceramic materials, has announced a significant advancement in high-temperature ceramic crucible technology. The company has successfully developed a crucible, referred to as the SiC-Si3N4/BN nano-coated crucible. Through innovative material composite and surface engineering, this product substantially enhances the crucible’s performance in extreme conditions, addressing key limitations of traditional silicon carbide and mullite crucibles in practical use. It offers a more effective and dependable solution for sectors including new energy batteries, magnetic materials, specialized metallurgy, and high-temperature chemical synthesis.
SiC-Si3N4 crucible with nano BN coating
Industry Challenges and Technological Innovation Background
In processes such as high-temperature melting, crystal growth, sintering of battery electrode materials, and magnetic material production, the crucible material critically impacts production efficiency and product quality. While widely used pure silicon carbide crucibles offer high thermal conductivity and some thermal shock resistance, their surfaces tend to adhere to molten materials and corrode rapidly in alkaline environments. Additionally, their internal porous structure reduces density and lifespan. Conversely, mullite crucibles, though less expensive, have comparatively lower thermal conductivity and limited flexural strength. They are susceptible to perforation under high-temperature and alkaline conditions, and are prone to cracking, especially during rapid temperature changes or under significant mechanical stress, making them unsuitable for increasingly stringent high-end manufacturing demands.
To overcome these obstacles, TRUNNANO’s R&D team focused on controlling material microstructure and surface functionalization. They innovatively combined the high thermal conductivity and hardness of silicon carbide (SiC) with the superior flexural strength and thermal shock resistance of silicon nitride (Si3N4). Employing vapor deposition technology, they created a dense and uniform nanoscale boron nitride (BN) coating on the crucible’s inner surface. This dual approach of “matrix composite + nanocoating” has led to substantial improvements in several key performance areas of the new product.
TRUNNANO General Manager Roger Luo commented, “We are consistently dedicated to resolving practical industry issues through pioneering advancements in materials science. The introduction of this nano-boron nitride coated silicon carbide-silicon nitride composite crucible addresses the common problems of ordinary silicon carbide crucibles sticking to the melt and exhibiting poor alkali resistance, as well as the issues of mullite crucibles having inadequate alkali and corrosion resistance.” Roger added, “We will also be exhibiting this product at The 18th China International Exhibition for Advanced Ceramics 2026 in Shanghai, China, at booth H022 in Hall 1.”
Performance Comparison of TRUNNANO’s New Composite Crucible with Traditional Silicon Carbide and Mullite Crucibles:
Application Performance: High-end Manufacturing Industry
In the lithium-ion battery materials sector, during the high-temperature sintering of cathode materials (such as high-nickel ternary materials), the crucible’s superior alkali resistance and high thermal conductivity ensure uniform composition and crystallinity, while preventing impurity contamination, thereby enhancing battery energy density and cycle stability.
For the production of magnetic materials, particularly in the melting and heat treatment of rare-earth permanent magnets like NdFeB, the crucible’s non-sticking properties minimize the loss of rare-earth metals due to adhesion. Its high thermal conductivity aids in controlling cooling rates and optimizing the magnet’s microstructure, leading to improved consistency in magnetic properties.
Furthermore, this crucible demonstrates significant application potential in industries such as electronic ceramics, special alloys, and photovoltaic silicon purification, offering customers a cleaner, more efficient, and cost-effective production tool.
Roger Luo further emphasized, “TRUNNANO will continue to boost its R&D investment, concentrating on the application of advanced ceramics in extreme environments. We aim to develop more high-performance, customized product lines and explore the boundless possibilities of material innovation with global partners.”
About TRUNNANO
TRUNNANO is a high-tech enterprise dedicated to the development, manufacturing, and commercialization of nanomaterials, advanced ceramic products, and other high-purity chemicals. Driven by technological innovation, its products find widespread use across various industrial fields. TRUNNANO has earned the trust of customers worldwide through its superior product quality and professional technical services. Under the leadership of CEO Roger Luo, TRUNNANO is committed to advancing materials science through continuous technological breakthroughs and contributing to global industrial development.
Media Contact: Roger Luo
Email: nanotrun@yahoo.com / sales8@nanotrun.com
Phone/WhatsApp: 0086 18837956556
Photos accompanying this announcement are available at
