In industries such as precision equipment, high vacuum systems, semiconductor equipment, medical equipment, and new energy, "permanent sealing" is not only a structural design issue, but also a comprehensive test of material stability, thermal stress control, and long-term reliability. Many engineers will repeatedly weigh between zirconium oxide (ZrO₂) and silicon nitride (Si₃N₄) when selecting materials. Zirconia has high toughness and stable coordination; silicon nitride has high strength and excellent thermal shock resistance. But what really determines "who is more suitable for permanent sealing" is not a single parameter, but the matching logic between materials and working conditions. Zirconia ceramic sealed shaft core silicon nitride seal What is "permanent sealing"? A truly permanent seal requires materials that simultaneously meet the following requirements during long-term operation: stable air tightness, no cracking during thermal cycles, no dimensional drift and metal connection failure over a long period of time, resistance to corrosion and media erosion, and structural stability under high pressure or vacuum. Therefore, sealing materials often have to face high-frequency hot and cold cycles, long-term mechanical stress, vacuum environment, corrosive media, and micron-level coordination requirements. And this is where ceramic materials really make a difference. Why is zirconia often used in sealing structures? The biggest advantage of zirconia is not that it is “hard”; High toughness . Zirconia is one of the current engineering ceramics with the highest fracture toughness. Compared with traditional brittle ceramics, it is less prone to sudden cracking when subjected to local stress, assembly deviations or differences in thermal expansion. This means that it is more suitable for complex matching structures, more suitable for metal-ceramic combination seals, and more suitable for systems with assembly preload. At the same time, the thermal expansion coefficient of zirconia is higher, closer to that of stainless steel and alloy steel, which can effectively reduce brazing stress and the risk of thermal cycle cracking. Therefore in Metal sealing, brazing sealing, medical sealing components, vacuum chamber Among them, zirconia tends to be more stable over the long term. Why do many high-end devices choose silicon nitride? Because permanent sealing is not only about “not cracking”; High temperature stability, thermal shock capability, long-term structural strength , and this is precisely the advantage of silicon nitride. Core advantages of silicon nitride Silicon nitride has Very low thermal expansion with Extremely high thermal conductivity . This means that when the device experiences rapid heating or sudden cooling, huge thermal stress is less likely to form within the material. Therefore, it performs extremely stably in semiconductor equipment, high-temperature vacuum systems, plasma equipment, and aviation sealing structures. In addition, silicon nitride is high temperature It can still maintain high mechanical properties under working conditions and is very suitable for long-term high-temperature sealing, high-pressure gas systems, and high-frequency thermal cycle structures. Silicon nitride is not necessarily suitable for all permanent seals The problem lies precisely in "too hard and too stable". Although silicon nitride has strong performance, it is significantly more difficult to process and assemble. For example, the processing cost is high, precision grinding is difficult, the expansion difference with the metal is large, and the brazing process window is narrower. Once the structural design is unreasonable, stress will easily accumulate at the interface after thermal cycling. How to choose between the two materials? More suitable to choose Zirconia Scenario: scene Typical applications Assembly stress is more complex Medical seals Pay more attention to airtight stability Precision valve body Requires long-term cooperation with metal Vacuum connection structure Small and precise structure Electronic packaging High requirements for processing consistency Sensor seal More suitable to choose silicon nitride Scenario: scene Typical applications Frequent thermal shock Semiconductor equipment drastic temperature changes Aerospace seals Long term high temperature operation high temperature轴承系统 Extreme working environment plasma equipment Requires ultra-high mechanical strength New energy high temperature structural parts What really determines the seal life is not the material itself. Many seals fail not because the material is “not good enough”; Thermal expansion mismatch, fit tolerance error, structural stress concentration, unreasonable brazing process, and substandard surface roughness . Ceramic materials are just the foundation. What truly determines the life of the permanent seal is the comprehensive result of material performance, structural design, process control and working condition matching. Conclusion There is no absolute "who is more advanced" between zirconium oxide and silicon nitride. They represent two completely different engineering logics: Zirconia强调“稳定配合” silicon nitride强调“极端性能” For permanent sealing, if the core issue is "long-term reliable connection", zirconia tends to be more stable; if the core issue is "extreme environmental survivability", silicon nitride is usually stronger. A truly excellent sealing design is never about choosing the most expensive material, but about choosing the material that is most suitable for the working conditions.

Technological innovation is the first driving force for industrial upgrading. Recently, the precision ceramics industry has ushered in a major technical exchange. Professors from famous universities and leading companies have joined forces to plan a new blueprint for industry-university-research cooperation. [Big names come to discuss innovation] Recently, Professor Shi Liyi, professor and doctoral supervisor at Shanghai University Nanoscience and Technology Research Center , led the scientific research team to visit our company to conduct on-site inspections and technical exchanges. The person in charge of our company and the core technical team extended a warm welcome to Professor Shi and his delegation and accompanied them throughout the visit. As a national expert in the field of material composite and advanced dispersion technology, Professor Shi Liyi enjoys a high reputation in the industry. This visit is not only a reflection of the deep friendship between the school and the enterprise, but also an important milestone for both parties to seek collaborative innovation in the field of cutting-edge precision ceramic technology. [Deeply cultivate technology and break through bottlenecks] At the subsequent symposium, the two parties conducted an in-depth discussion for several hours on the core topic of "National Standard Trap Product Preparation". Technical standards and process stability in this field have always been the focus of the industry. Professor Shi Liyi combined his years of scientific research accumulation to provide forward-looking guidance on key nodes in the preparation process. The technical backbone of our company also had a heated discussion with professors based on the "pain points" in production practice. Both parties reached a consensus: Only by combining rigorous academic theory with precise production technology can we truly formulate standards that comply with national standards and lead the industry. [School-enterprise linkage to lay out the future] Communication does not stop at the technical level. Both sides settle In-depth cooperation between precision ceramics industry, academia and research institutes Conducted comprehensive negotiations involving Joint research and development of new materials: Jointly overcome the difficulties in the preparation of ceramic materials in high-precision fields; Talent cultivation and practical training: Establish a talent exchange mechanism to provide high-quality and comprehensive talents to the industry; Achievements transformation and implementation: Accelerate the transfer of scientific research results from "laboratories" to "production lines" and jointly solve the "stuck neck" technical problems in the field of precision ceramics. 【Outlook】 This visit further consolidated the cooperation and mutual trust between the school and the enterprise. In the future, our company will fully rely on the strong scientific research advantages of Shanghai University and give full play to the company's expertise in market application and industrialization capabilities. Through the deep integration of industry, academia, research and application, we will work together to promote technological iteration in the field of precision ceramics and contribute scientific and technological strength to the realization of high-quality leap-forward development in the industry!

Recently, the 18th China International Exhibition for Advanced Ceramics (IACE CHINA 2026) grandly opened at the National Exhibition and Convention Center in Shanghai. This three-day event (March 24–26) spanned an exhibition area of 55,000 square meters, bringing together over 1,000 renowned domestic and international enterprises and attracting an estimated 80,000 professional visitors. Zhejiang Zhufa Precision Ceramics Technology Co., Ltd. (hereinafter referred to as "Zhufa Ceramics") made a stunning appearance with its full range of advanced ceramic products and customized solutions. Leveraging its solid technical strength, diverse product matrix, and flexible customization services, the company became a focal point of the exhibition, garnering widespread attention from industry peers and buyers. As a source manufacturer specializing in advanced ceramics, Zhufa Ceramics has been deeply involved in the industry for years. The company focuses on the R&D, production, and customization of advanced ceramic materials such as Zirconia (ZrO_2), Alumina (Al_2O_3), Aluminum Nitride (AlN), Silicon Nitride (Si_3N_4), and Silicon Carbide (SiC). At this exhibition, the company showcased its technical expertise and product advantages across the precision ceramics field, presenting ceramic components and non-standard customized samples suitable for semiconductors, new energy, medical equipment, high-end manufacturing, and other sectors. Under the theme of "Full Industry Chain Synergy, Empowering Industrial Upgrading," the exhibition featured an ecological layout of "Five Concurrent Exhibitions." In addition to the core advanced ceramics show, it integrated four major themes: Powder Metallurgy, Powder Processing, Magnetic Materials, and Additive Manufacturing. This created a comprehensive resource integration platform covering "Materials-Equipment-Technology-Application," precisely reaching advanced ceramics industrial clusters and building an efficient bridge for technical exchange and supply-demand matching. During the exhibition, over 100 academic reports, technical forums, and industrial summits were held to explore high-performance, intelligent, and green development directions for the industry. Leveraging the exhibition platform, Zhufa Ceramics engaged in in-depth exchanges with professional teams, buyers, and partners to precisely match core demands in fields such as aerospace and bio-medical. Many on-site clients expressed strong interest in the company’s non-standard customization services, small-batch prototyping capabilities, and product precision, leading to numerous preliminary cooperation intentions. This Shanghai exhibition served as both a window for Zhufa Ceramics to demonstrate its strength and a vital opportunity to gain industry insights and expand global cooperation. Moving forward, Zhufa Ceramics will continue to deepen its R&D in advanced ceramic materials and customization. By relying on a mature process system and refined service workflows, the company aims to optimize product performance and enhance customization capabilities, empowering international industrial customers with reliable solutions and contributing to the high-quality development of the advanced ceramics industry. Exhibition Information Event Name: The 18th China International Exhibition for Advanced Ceramics (IACE CHINA 2026) Date: March 24–26, 2026 Location: Booth G161, Hall 1.1, National Exhibition and Convention Center (Shanghai) Hotline: +86 18888785188

Zhejiang Zhufa Precision Ceramics Technology Co., Ltd. will participate in Highly-functional Material Week Tokyo 2025, held from November 12th to 14th, 2025 at Makuhari Messe in Tokyo, Japan. During the exhibition, we will showcase our latest high-performance ceramic materials technologies and solutions, particularly suitable for precision engineering and high-end manufacturing. As a leader in the precision ceramics industry, Zhejiang Zhufa Precision Ceramics Technology Co., Ltd. is committed to providing innovative, high-quality ceramic products to global customers, covering a wide range of industrial applications, including electronics, machinery, optics, energy, food and medical, semiconductors, petrochemicals, automotive, and aerospace. Our ceramic materials are widely used in many high-tech industries due to their excellent wear resistance, high-temperature resistance, and good electrical insulation properties. Highly-functional Material Week Tokyo is one of Japan's largest exhibitions for the functional materials industry, bringing together many of the world's leading high-performance material manufacturers and technology suppliers. Photonix, a core component of the exhibition, focuses on optics, electronics, and optoelectronics technologies, attracting numerous industry professionals, companies, and buyers. Zhejiang Zhufa Precision Ceramics Technology Co., Ltd. will be located at booth 12-20. Our technical team will be providing full technical support and detailed product explanations to attendees throughout the exhibition. We look forward to exchanging ideas with you at the exhibition and exploring future cooperation opportunities.

Dates: July 29-31Location: Hall 3, National Exhibition and Convention Center (Shanghai)Booth: 3-D19

Dates: September 10-12 Location: Hall 14, Shenzhen World Exhibition & Convention Center (Bao'an) Booth: 14A50

To improve production capacity and efficiency, Zhufa Precision Ceramics recently installed several state-of-the-art CNC machining centers, marking an important step towards intelligent manufacturing. These machines enable ultra-professional machining of complex ceramic parts, enhancing Zhufa’s leadership in customized advanced ceramic solutions.

Recently, Zhejiang Zhufa Precision Ceramics Technology Co., Ltd. has continued to make efforts in the fields of new ceramic materials and advanced ceramic structural parts. As a source enterprise focusing on production, processing and customization in this field, it is gradually becoming an innovation benchmark in the industry.​ Since its establishment, Zhufa Precision Ceramics has been committed to the research and development and application of new ceramic materials. The company's main business scope is wide, covering a variety of high-performance ceramic materials such as zirconia ceramics, alumina ceramics, aluminum nitride ceramics, silicon nitride ceramics, silicon carbide ceramics, etc. It also has rich experience in the production, processing, non-standard customization of industrial ceramic structural parts, precision ceramics and advanced ceramics.​ In terms of production technology, Zhufa Precision Ceramics show professionalism. The company has achieved an integrated industrial layout from powder preparation to device processing, and has a complete set of high-end production and manufacturing testing equipment covering all aspects such as material experiments, granulation, molding, sintering and precision manufacturing. This complete industrial chain not only ensures the quality stability of the product, but also provides customers with one-stop service from 3D modeling support in the concept design stage to small batch sample verification, and to mass production and delivery of 10,000-piece.​ It is understood that the company's current main products include toughened zirconia, magnesium zirconia, alumina zirconia, alumina, silicon nitride, silicon carbide, etc. These products are widely used in electronics, machinery, chemicals, aerospace and other fields. The company's relevant person in charge said: "Our technical team always maintains a keen insight into market demand and continuously optimizes product performance to meet the diverse needs of different customers. Whether it is complex structural parts or high-precision ceramic parts, we can provide professional solutions."​ With the continuous growth of the market's demand for high-performance ceramic materials, Zhufa Precision Ceramics will continue to increase R&D investment, enhance its own technical strength, and strive to become the leader in the precision ceramic industry, contributing to the development of my country's new ceramic materials industry.

In order to further expand its international footprint, Zhejiang Zhufa Precision Ceramics Technology Co., Ltd. has strengthened its cooperation with global customers. In the first half of 2025, export orders increased by 40% year-on-year, performing well in Europe, North America and Southeast Asia. The company's expertise in zirconia, alumina and silicon nitride ceramics is highly praised by international partners.