Breakthrough in High-Performance Ceramic Precursor Polysilazane Synthesis Unlocks New Era for Third-Gen Semiconductor and New Energy Applications

I. Technical Background: The Critical Step from Lab to Industry
        Polysilazane, a polymer composed of silicon, nitrogen, hydrogen, and a small amount of carbon atoms, possesses a unique molecular structure that allows it to be pyrolyzed at high temperatures into high-performance ceramic materials—silicon nitride, silicon carbide, or silicon carbonitride ceramics. This property makes it a key precursor for "polymer-derived ceramics" with irreplaceable strategic value in high-end manufacturing. For a long time, its large-scale application faced two core bottlenecks: first, the complex and costly traditional preparation processes led to prohibitively high product prices; second, poor batch-to-batch performance stability and broad molecular weight distribution made it difficult to meet the stringent requirements for material consistency in precision industries like semiconductors and new energy. In recent years, with sustained R&D investment in organosilicon and specialty polymers, revolutionary progress has been made in polysilazane synthesis processes, successfully bridging the path from lab-scale gram samples to industrial ton-scale products. This provides a stable and reliable source of ceramic precursors for multiple downstream strategic emerging industries.

II. Process Breakthrough: Novel Synthesis Pathways for Perhydropolysilazane and Vinyl-Containing Polysilazane
        The core technological breakthrough enabling this industrialization is primarily reflected in process innovations for two mainstream product lines: Perhydropolysilazane (PHPS) and Vinyl-containing Polysilazane.
        For the synthesis of Perhydropolysilazane (PHPS), R&D teams abandoned the traditional chlorosilane ammonolysis method and innovatively adopted the Catalytic Dehydrogenative Coupling approach. This method uses low-cost, readily available silane and ammonia as starting materials, enabling the efficient and directional construction of silicon-nitrogen bonds under mild conditions with the aid of organometallic catalysts. The new process not only avoids the use of highly corrosive and difficult-to-handle chlorosilanes, significantly reducing waste emissions, but more importantly, allows for precise control over polymer chain length and molecular weight distribution through accurate management of catalyst activity and reaction conditions. Currently, PHPS produced via this process boasts a stable number-average molecular weight between 900-1200, a molecular weight distribution index below 1.3, and a ceramic yield exceeding 85%, far surpassing the 70% yield of traditional methods. The product exists as a colorless transparent liquid, with solid content flexibly adjustable between 20%-50% based on downstream needs, making it particularly suitable as an impregnation agent for high-temperature anti-oxidation coatings or fiber-reinforced ceramic matrix composites.
        For the synthesis of Vinyl-containing Polysilazane, the technical challenge of Controllable Functional Group Introduction has been overcome. By precisely introducing vinyl-containing organosilicon monomers during polymerization, reactive vinyl groups capable of participating in subsequent photo-curing or thermal curing cross-linking reactions have been successfully grafted onto the polysilazane backbone or side chains. This modification endows the polysilazane precursor with processability and room-temperature curability. The resulting product is a pale yellow to amber transparent liquid with adjustable viscosity. It retains the high-temperature performance of precursor-derived ceramics while offering processing convenience similar to organic resins. This significantly broadens the processing window and application scenarios when used as ceramic coatings, "inks" for ceramic 3D printing, or binders for ceramic matrix composites. Both processes have achieved continuous, enclosed production, with key impurities such as chloride ions and metal ions controlled at ppm levels, meeting the purity requirements for semiconductor-grade applications.

III. Application Scenario Expansion: Empowering Third-Generation Semiconductors and Cutting-Edge New Energy Technologies
        The stable supply of high-performance polysilazane is profoundly altering the technology roadmaps of several high-end manufacturing sectors, with its application value being particularly prominent in two directions: third-generation semiconductor packaging and solid-state lithium batteries.
        In the field of Third-Generation Semiconductor (e.g., SiC, GaN) power device packaging, polysilazane shows immense potential as a precursor for Low-Temperature Ceramizable Packaging Materials. Traditional packaging materials like epoxy resins or silicone gels typically have long-term upper operating temperature limits below 200°C, struggling to match the junction temperatures of third-generation semiconductor devices, which can reach 250°C or even 300°C. Polysilazane precursors can transform into dense silicon nitride ceramics at moderate temperatures of 300-500°C. This ceramic layer offers excellent electrical insulation, high thermal conductivity (>30 W/m·K), and a coefficient of thermal expansion well-matched with semiconductor materials. Applying polysilazane for chip surface coating or encapsulation forms a ceramic packaging layer that not only effectively dissipates heat but also provides superior hermetic protection against moisture and ion ingress. This can improve the reliability and lifespan of power modules by an order of magnitude, serving as a key packaging material for advancing high-voltage, high-power devices in electric vehicles, rail transit, and smart grids.
        In the New Energy sector, polysilazane is becoming a critical additive for enhancing the performance of Solid-State Lithium Batteries. On one hand, it is used as a precursor for an Interfacial Modification Layer between the solid electrolyte and electrode active materials. By coating an extremely thin layer of polysilazane solution on the electrode surface and performing in-situ ceramization, a dense, silicon nitride-based interfacial layer with tunable ionic conductivity can be formed. This layer effectively suppresses lithium dendrite growth, reduces side reactions between the electrode and electrolyte, and significantly enhances the battery's cycle stability and safety. On the other hand, perhydropolysilazane can serve as a high-performance binder for silicon-carbon anode materials. During the battery's initial charge-discharge cycles, it forms a robust ceramic network in situ on the anode surface, effectively "locking" the silicon particles against the massive volume expansion during cycling, preventing electrode structure pulverization, and thereby markedly improving the cycle life of silicon-based anodes. Relevant tests indicate that silicon-carbon anodes using this binder can achieve capacity retention rates above 80% after 500 cycles, compared to less than 50% for anodes using conventional binders.

IV. Market Outlook and Industrial Impact: From "Bottleneck" Material to Building a Self-Reliant Supply      Chain        
        Historically, the market for high-purity, high-performance polysilazane was dominated by a handful of overseas companies. Products were not only expensive but also subject to supply instability and export control risks, becoming a "bottleneck" material hindering the development of related high-end industries. With breakthroughs in domestic large-scale preparation technology and the release of production capacity, this situation is rapidly changing.
        In terms of market size, the global polysilazane market is experiencing rapid growth driven by the fast development of industries like third-generation semiconductors, new energy vehicles, and aerospace. Industry analysis reports indicate that the global market size exceeded $3 billion in 2026 and is projected to maintain a compound annual growth rate of over 17% until 2035. Specialty high-performance grades for semiconductor and new energy applications are the primary growth drivers.
        The mass production of domestic polysilazane has first achieved import substitution and cost reduction for this critical material. Feedback from the industry chain suggests procurement costs for similar products have dropped by approximately 40% compared to imports, with delivery lead times shortened from several months to weeks. This greatly enhances downstream customers' design freedom and supply chain security.Secondly, it accelerates innovation on the application side. Domestic downstream companies can now more easily access materials for application development, spurring a wave of innovative solutions based on polymer-derived ceramic technology, such as preparing long-life anti-oxidation coatings for photovoltaic thermal field components or developing ceramic fiber felts for high-temperature filtration. At a deeper level, it completes China's integrated industrial chain from organosilicon monomers and specialty polymers to advanced ceramic products.It signifies that in the niche field of high-end ceramic precursors, China has progressed from technological followership to running abreast and even achieving partial leadership, providing a solid material foundation for the upgrading of the entire advanced manufacturing industry.
        Looking ahead, polysilazane technology development will increasingly focus on functionalization and intelligence.
Examples include designing molecules to introduce specific functional groups for creating smart ceramic precursors with optical, electrical, or magnetic responses, or developing new systems with lower pyrolysis temperatures and denser ceramic products to adapt to temperature-sensitive substrates (like polymers or carbon fibers). As synthetic chemistry, process engineering, and end-use applications deepen their interdisciplinary integration, polysilazane—a material both "ancient" and "young"—is destined to unleash renewed vitality in more fields crucial to the national economy and people's livelihood.