China Hunan Yibeinuo New Material Co., Ltd. Company News

Alumina ceramics (as a representative of advanced ceramic materials, with their excellent mechanical properties, high temperature resistance, and chemical stability) show irreplaceable value in industry, electronics, and medical treatment. This article will deeply analyze the characteristics, preparation process, and cutting-edge applications of alumina ceramics, and explore how it promotes the development of modern science and technology, and industry.     Core characteristics of alumina ceramics Alumina ceramics are high-purity ceramic materials with α-Al₂O₃ as the main crystal phase. Its performance advantages include: Ultra-high hardness and wear resistance: Mohs hardness reaches 9, second only to diamond, suitable for extreme wear environments. High temperature resistance and heat insulation: The melting point is as high as 2050℃, and it can work stably for a long time at 1600℃, which is an ideal choice for high-temperature furnaces and aerospace components. Chemical inertness: It is resistant to acid and alkali corrosion and is widely used in chemical reactor linings and biomedical implants. Excellent electrical insulation: It has high volume resistivity and is a key material for integrated circuit substrates and high-voltage insulation parts.   Preparation process The preparation process of alumina ceramics mainly covers raw material preparation, molding, sintering, and other links. 1. Fully mix high-purity alumina powder with appropriate additives and make a uniform slurry through ball milling and other processes; 2. Use appropriate molding methods, such as dry pressing, isostatic pressing, injection molding, etc., to process the slurry into the required shape; 3. Place the formed green body in a high-temperature environment for sintering to promote its densification, thereby forming an alumina ceramic product with specific properties； 4. During the sintering process, parameters such as sintering temperature, time, and atmosphere must be strictly controlled to ensure that the ceramic performance reaches a better state.   Application fields Electronic information field: Helping the rise of "Chinese core": In integrated circuit manufacturing, alumina ceramic substrates provide stable support and insulation environment for chips; in the field of electronic component packaging, it effectively protects internal components and improves the reliability of electronic equipment. Many domestic electronic companies actively adopt alumina ceramic materials to promote my country's electronic information industry to move towards high-end. ​   Mechanical manufacturing field: Improving the precision of "Made in China": Alumina ceramic tools and molds are widely used in the mechanical processing industry, greatly improving processing efficiency and precision. In automobile manufacturing, ceramic components help engines achieve lightweight and high performance; in the aerospace field, alumina ceramics are used to manufacture engine hot end components and aviation bearings, providing key material guarantees for the development of my country's aerospace industry. ​   Chemical and pharmaceutical fields: Protecting production safety and quality: With its chemical corrosion resistance, alumina ceramics play an important role in chemical reactors and pharmaceutical equipment, effectively preventing equipment corrosion, avoiding drug contamination, and ensuring production safety and product quality. ​   Medical and health field: Opening a new chapter in precision medicine: The good biocompatibility of alumina ceramics makes it an ideal material for artificial joints and dental implants. Many domestic medical institutions have successfully applied alumina ceramic artificial joints, bringing better treatment effects to patients and improving their quality of life. ​   New energy and environmental protection fields: Driving green development: In the field of new energy, alumina ceramics are used as key components of fuel cells to improve battery performance; in the field of environmental protection, they are used as filter materials for waste gas treatment equipment to help achieve efficient purification of industrial waste gas and contribute to the realization of my country's "dual carbon" goals.   Future development trends 1. Technological innovation and breakthroughs In the future, the preparation and processing technology of alumina ceramics will usher in continuous innovation and breakthroughs. The in-depth application of nanotechnology will significantly improve the comprehensive performance of alumina ceramics. Nano-level alumina ceramics will not only achieve a qualitative leap in strength, hardness, and toughness, but also show unique advantages in biocompatibility and catalytic performance.   The widespread application of 3D printing technology will bring revolutionary changes to the manufacturing of alumina ceramics. This technology can achieve rapid prototyping of products with complex geometric structures, effectively improve production efficiency, and ensure the stability and consistency of product quality.   2. Trends in market demand evolution With the development of the global economy and the improvement of residents' living standards, as well as the general enhancement of environmental awareness, the market demand structure of alumina ceramics is undergoing profound changes.   Environmental protection field: As a green and environmentally friendly material, alumina ceramics will be further expanded in the application of sewage treatment, industrial waste gas purification, and other subdivided scenarios.   New energy industry: Especially in key areas such as lithium batteries and fuel cells, alumina ceramics will play an increasingly important role in the manufacturing of core components such as battery separators and electrode materials.   With the vigorous development of emerging industries such as smart homes and smart wearable devices, the market demand for alumina ceramic products will show diversified and personalized characteristics, promoting the development of products towards customization and intelligence.

Zirconia ceramics are advanced ceramic materials with zirconium oxide (ZrO₂) as the main component. The following will introduce its characteristics, types, production processes, and application fields in detail:   Basic characteristics Mechanical properties: It has high hardness, high strength, and high toughness. Its hardness is second only to superhard materials such as diamond and cubic boron nitride. It performs well in wear resistance and impact resistance.   Thermal properties: The melting point is as high as 2715℃, with good high temperature resistance and thermal insulation performance. At the same time, the thermal expansion coefficient is similar to that of metal, and it can maintain stable size and performance under different temperature environments.   Electrical properties: It is a good insulator at room temperature, and has certain ionic conductivity under high temperature or specific doping conditions. It can be used to manufacture solid oxide fuel cells, oxygen sensors, and other devices.   Chemical properties: It has excellent chemical stability, is resistant to corrosion by chemicals such as acids, alkalis, and salts, and can maintain stable performance in harsh chemical environments.   Production process Raw material preparation: Zirconium oxide is extracted from zirconium ore, and high-purity zirconium oxide powder is obtained after purification. Common purification methods include chlorination and thermal decomposition, alkali metal oxidation decomposition, lime melting, etc.   Molding: Including dry pressing, isostatic pressing, slip casting, hot die casting, tape casting, etc. Among them, dry pressing is suitable for manufacturing products with simple shapes and large sizes; slip casting is suitable for preparing large ceramic parts with complex shapes; tape casting is often used to prepare film materials.   Degreasing and debinding: In addition to dry pressing, other molding processes will add a certain proportion of plasticizer during molding. After molding, the plasticizer needs to be removed by heating and other methods to avoid affecting the quality of the sintered product.   Sintering: Pressureless sintering, hot pressing sintering, hot isostatic pressing (HIP), microwave sintering and other methods can be used to sinter the green body into a dense ceramic product at high temperature. Accurately controlling parameters such as sintering temperature, insulation time and sintering atmosphere is crucial to obtaining zirconia ceramics with excellent performance.   Application fields Industrial manufacturing field In mechanical manufacturing, it is used to manufacture high-precision bearings, seals, etc. Zirconia ceramic bearings have the characteristics of low friction coefficient, high precision and long life, and can be used in high-speed and high-temperature mechanical operation environments, such as high-speed machine tool spindles, aircraft engines and other equipmen.   In the chemical industry, it is used to manufacture various corrosion-resistant pipes, valves, pump liners, etc. These ceramic components can effectively resist the corrosion of strong acids, strong alkalis, and other chemical substances, ensuring the continuity and safety of chemical production.   Electronic field As a substrate material for electronic components, zirconia ceramics can provide good insulation and heat dissipation properties for electronic chips, etc. In the semiconductor manufacturing process, it is used to manufacture some components in high-temperature and high-cleanliness environments, such as wafer carriers.   Biomedical field In addition to the dental applications mentioned above, it is also used in orthopedics. For example, it is used to manufacture artificial joint heads, etc. Its good wear resistance and biocompatibility can reduce the adverse effects of debris generated by joint wear on surrounding tissues, and can coexist with human bone tissue for a long time.   Aerospace field Used to manufacture high-temperature components of aircraft engines, such as thermal barrier coatings. These coatings can reduce the actual operating temperature of engine components, improve the thermal efficiency and performance of the engine, and extend the service life of engine components. In short, zirconia ceramics play an increasingly important role in modern industry and technology with their many excellent properties.  

With the advancement of technology, ceramic anti-wear technology has been widely recognized and proven to have excellent anti-wear effects in practical applications. The hardness of alumina ceramics is extremely high, far exceeding that of general alloys. Therefore, in heavy wear industries such as steel, electricity, cement, lithium battery powder transportation, and mining docks, ceramic anti-wear technology helps many enterprises save costs and improve efficiency. However, in the process of ceramic anti-wear, there may occasionally be problems with ceramic pieces falling off, which has caused difficulties for many enterprises. So, how can we effectively solve the problem of ceramic detachment? Analysis of the causes of ceramic detachment Normally, correctly installed wear-resistant ceramic tiles rarely come off. But if it is in extremely harsh environments such as high temperatures, strong impacts, etc., the problem of detachment is prone to occur. Especially in high-temperature environments, ceramic adhesives may fail or their viscosity may decrease, and other installation methods may also be significantly affected by temperature.   Strategies for solving the problem of ceramic detachment ✅During the installation of ceramic tiles, the properties of materials such as adhesives, screws, and dovetail guides directly affect the firmness of the tiles, especially the significant difference in adhesive viscosity, which directly affects the possibility of tile detachment. The combination of high-quality screws and ceramic caps, as well as high-quality dovetail guides, can effectively reduce the detachment of ceramic pieces. Therefore, selecting high-quality installation materials is one of the key measures to reduce the detachment of ceramic tiles.  

Alumina ceramics are a type of commonly used wear-resistant ceramic material, with high-purity alumina (AL₂O₃) as the main component. This material has outstanding properties such as excellent hardness, strong corrosion resistance, high mechanical strength, and high temperature resistance, so it is often used in industrial environments with strict requirements on wear resistance, corrosion resistance, and pressure resistance.   After alumina ceramics are installed on the surface of pipelines, chutes, hoppers and various equipment, their service life can be significantly extended. Alumina ceramics are also frequently used in the field of electronic products due to their excellent insulation properties. Manufacturing Process of Alumina Ceramics Raw Material Preparation High-purity Al₂O₃ Powder: Extracted from bauxite via the Bayer process or calcination. Additive Mixing: Sintering aids (e.g., MgO, SiO₂) added to optimize sintering.  Powder Processing: Ball milling & spray drying to achieve uniform particle size (0.1-1μm).   Forming Techniques Dry Pressing: Simple shapes (plates/rods) under 50-200 MPa pressure. Injection Molding: Complex parts via powder-binder mixture injection. Isostatic Pressing: Uniform density for large/high-performance components.   Sintering Temperature: 1500°C-1800°C (higher for purer Al₂O₃). Atmosphere: Air or inert gas (e.g., nitrogen). Densification: Porosity reduced to

In the engineering pipeline industry, the ceramic composite pipe is particularly outstanding due to its excellent performance. It is manufactured using advanced self-propagating high-temperature synthesis technology and has become a new generation of wear-resistant and corrosion-resistant engineering pipeline materials that have attracted much attention.   The unique structure of the ceramic composite pipe is the basis of its excellent performance. It consists of three layers, namely the ceramic layer, the transition layer, and the metal base layer. Among them, the formation of the ceramic layer is particularly special. Molten alumina is formed at a high temperature of more than 2500 degrees. Through the action of centrifugal force, it is evenly spread on the inner wall of the metal pipe and quickly solidifies. This process gives the ceramic layer a dense structure, its surface is extremely smooth, and it is tightly combined with the metal pipe. The ceramic composite pipe combines a variety of excellent properties. It has high strength, good toughness, impact resistance and excellent welding performance of metal pipes. At the same time, it also has comprehensive properties such as wear resistance, heat resistance, corrosion resistance, mechanical shock resistance, and thermal shock resistance. These performance characteristics give it unique advantages in material transportation.   In many industries, ceramic composite pipes play an important role. For industries such as electricity, metallurgy, mining, coal, and chemicals, conveying materials such as sand, stone, coal, ash, and aluminum liquid is a key link in daily production. These materials are often abrasive or corrosive, and ceramic composite pipes have become an ideal choice for conveying these abrasive materials and corrosive media due to their wear resistance, corrosion resistance, and heat resistance. Whether facing the wear of granular materials or the erosion of corrosive media, it can ensure the smooth progress of production and transportation.   The wide application of ceramic composite pipes has undoubtedly provided strong support for the efficient and stable development of many industries.

In the field of industrial material transmission, pneumatic conveying systems are widely used due to their high efficiency and cleanliness. However, conveying pipelines will encounter wear problems during operation, especially when the wear of elbows is more prominent, which directly affects the stability and life of the system.   During the pneumatic conveying process, material particles move at high speed in the pipeline, causing continuous collision and friction with the inner wall of the pipeline. Although the straight pipe section will also wear, the wear is relatively uniform. At the elbow, the change in the direction of material flow causes the particles to have a violent impact on the inner wall of the elbow, causing serious wear. To meet this challenge, a variety of solutions have been proposed. Using elbows made of wear-resistant ceramic materials is one of the effective methods. For example, wear-resistant ceramic elbows use their high hardness and wear resistance to effectively resist the impact and friction of material particles. Another method is to increase the thickness of the steel pipe of the elbow to enhance its wear resistance, but this method has limited effect. In addition, by optimizing the system design, such as controlling the material flow rate and reducing the number of elbows, wear can also be reduced to a certain extent.   Although wear-resistant ceramic elbows have largely solved the wear problem, further protective measures are still needed in more complex and high-intensity conveying tasks. Therefore, wear-resistant ceramic backpack elbows came into being. Based on the traditional wear-resistant ceramic elbows, this elbow adds "backpack" structure to provide additional protection for the easily worn parts of the elbow, thereby extending the service life.   In summary, the wear problem of elbows in pneumatic conveying pipelines cannot be ignored, especially the wear at the bends of the elbows. It is essential to ensure the efficient and stable operation of the pneumatic conveying system by deeply understanding the wear mechanism and taking appropriate protective measures.

There are significant differences between metal elbows and ceramic elbows in material properties, performance, and application scenarios. The following are their main differences: Material properties Metal elbows: Usually made of metal materials such as cast steel and alloy steel, they have high strength and toughness, but relatively low hardness (surface hardness generally does not exceed HRC60) and limited wear resistance. Ceramic elbows: The lining is made of high-performance ceramic materials (such as alumina ceramics), with extremely high hardness (Mohs hardness can reach above level 9, HRA85 or above), and wear resistance and corrosion resistance are significantly better than metal. Wear resistance Metal elbows: Due to the low hardness of the material, when conveying abrasive media (such as slurry and coal powder), it wears faster and has a shorter service life. Ceramic elbows: Excellent wear resistance, service life is several times or even more than ten times that of ordinary metal elbows, especially suitable for high wear conditions.   Corrosion resistance Metal elbows: They are easily corroded in corrosive environments such as acids and alkalis, especially in humid environments, where they will rust and cause increased wear. Ceramic elbows: They have stable chemical properties are resistant to acid and alkali corrosion, and can maintain good performance even in harsh environments.   Operation resistance Metal elbows: The inner surface roughness is high, which can easily cause fluid turbulence and increase operation resistance. Ceramic elbows: The inner surface is smooth and the operation resistance is small, which can effectively reduce energy consumption during fluid transportation.   Weight and installation Metal elbows: They are usually heavier and have higher installation and transportation costs. Ceramic elbows: They are light in weight, easy to install, have low system load, and save manpower and material resources.   Service life Metal elbows: In high-wear environments, they have a short service life and may need to be replaced frequently. Ceramic elbows: They have a long service life, reduce the frequency of maintenance and replacement, and reduce long-term use costs.   Application scenarios Metal elbows: They are suitable for ordinary piping systems that do not require high wear resistance and corrosion resistance. Ceramic elbow: widely used in high-wear and high-corrosion industrial fields such as electricity, metallurgy, chemical industry, mining, etc., especially suitable for conveying solid particles, slurry, coal powder and other media.

Core characteristics of wear-resistant ceramic sheets Material composition: Alumina (Al₂O₃, purity 92%~99%) Performance advantages: High hardness: Rockwell hardness HRA≥85, wear resistance is more than 20 times that of manganese steel. Corrosion resistance: Acid and alkali resistance, high-temperature resistance (some ceramics can withstand temperatures up to 1600℃). Lightweight: The density is only 1/3 of that of steel, reducing the load on equipment. Issue Phenomenon Cause Analysis Solution Local Ceramic Tile Shedding Oil contamination on the substrate was not completely removed Rework by re-sandblasting and using a degreaser for a second cleaning Brittle and Cracked Glue Layer Incorrect mixing ratio or uneven mixing Strictly weigh according to the specified ratio, and ensure mixing time is ≥3 minutes Ceramic Edge Chipping No chamfering or buffer layer applied Use ceramic tiles with R5 rounded corners for the edges, and install rubber edge guards Ceramic Lifting in High-Temperature Areas The glue's temperature resistance is insufficient Replace with inorganic glue or add an anchoring structure Installation process steps 1. Surface treatment Cleaning: Remove oil, rust, and impurities from the surface of the equipment. Polishing: Increase surface roughness and improve bonding effect.   2. Adhesive selection Epoxy resin: Suitable for most working conditions, high bonding strength. Polyurethane: Suitable for high-temperature environments, good elasticity. Inorganic adhesive: Suitable for ultra-high temperature environments, good heat resistance.   3. Ceramic sheet pasting Gluing: Apply adhesive evenly on the back of the equipment and ceramic sheet. Pasting: Paste the ceramic sheet according to the designed position to ensure a tight fit. Pressurization: Use a clamp or heavy object to pressurize to ensure a firm bond.   4. Curing Room temperature curing: Usually takes more than 24 hours. Heating curing: Curing can be accelerated in a high-temperature environment to improve bonding strength.   5. Inspection and trimming Inspection: Check the bonding quality after curing to ensure no shedding or hollowing. Trimming: Trim if necessary to ensure a smooth surface.   Precautions Environmental conditions: Ensure that the installation environment is dry and clean, and avoid dust and moisture. Use of adhesive: Strictly follow the instructions to avoid waste or failure. Safety protection: Wear protective equipment to avoid contact with the adhesive on the skin or eyes. Quality inspection: Perform a comprehensive inspection after installation to ensure there are no quality problems.

Ceramic materials are widely used in many fields, and their wear resistance is one of the most studied properties. Wear resistance reflects the ability of materials to resist loss under mechanical effects such as wear and friction. This property plays a vital role in exploring the practical application areas of ceramic materials.   Basic concepts about the wear of ceramic materials 1. The connection between wear resistance and other properties: Wear-resistant ceramic materials may have both wear resistance and toughness, but the hardness is not necessarily outstanding; materials with high hardness are wear-resistant, but they may not be completely tough. This shows that wear resistance is not equivalent to the toughness or hardness of the material. Wear has various causes, including adhesive wear, scratch wear, surface fatigue wear, and corrosive wear. 2. The core of ceramic wear test: Ceramic wear test mainly evaluates the ability of ceramic materials to withstand abrasive wear under specific conditions. The data obtained through such tests helps to determine the specific type of material applicable.   3. Factors to consider when testing wear resistance: When conducting wear resistance tests, attention should be paid to the intrinsic surface properties of the material, such as hardness, strength, ductility, and work hardening. At the same time, factors such as surface finish, lubrication, load size, speed, corrosion, temperature, and the performance of the opposing surfaces are also crucial.   Typical wear-resistant ceramics and their application examples Zirconium oxide, silicon nitride, boron carbide, cubic boron nitride, aluminum oxide, and silicon carbide are typical wear-resistant ceramics. These ceramic materials are widely used in the fields of material grinding and polishing, structural components, wear-resistant coatings, and linings of pipes or equipment.   The wear resistance of ceramic materials directly affects the safe service life of mechanical equipment and parts. Therefore, determining their wear resistance is crucial to finding applications for these materials in mechanical equipment.

Ceramic composite wear-resistant pipe is widely used in the field of wear-resistant pipes and is highly respected. This is due to its excellent wear resistance and corrosion resistance, as well as its simple installation and low maintenance cost. Elacera has been deeply involved in wear-resistant ceramic production for over 20 years. We are committed to continuous improvement of ceramic quality, continuing to hone the ceramic composite process, and striving for perfection.   The ceramic composite wear-resistant pipe is usually composed of three layers of steel pipe, adhesive, and wear-resistant ceramic. Advanced adhesive technology is used to firmly adhere the ceramic sheet to the inner wall of the steel pipe. This unique structure simplifies the installation process and reduces costs. In addition, the patch wear-resistant pipe is also suitable for the working conditions of pneumatic conveying powder, such as the equipment and pipelines of the powder-making system of thermal power plants, and the powder selector of cement plants. In addition, the patch wear-resistant pipe is also suitable for the working conditions of pneumatic conveying powder. Ceramic quality is certainly critical, but the ceramic pasting process also has an important impact on the pipeline's performance. Problems such as too large gaps between ceramic sheets, uneven surfaces, or adhesive residues may cause material blockage, reduce conveying efficiency, and aggravate wear. To this end, we have taken a series of measures to improve the ceramic composite effect.   On the one hand, we have introduced advanced production equipment, including laser cutting machines, precision grinders, etc., to ensure that the ceramic sheets are accurate in size, fit tightly, and effectively reduce gaps.   On the other hand, we have also improved and optimized the ceramic pasting process. For example, the staggered arch installation process is used instead of the traditional direct pasting process to make the ceramic layer more stable and not easy to fall off. This process not only enhances the wear resistance of the ceramic layer but also ensures its long-term operation stability. After the ceramic pasting is completed, subsequent processes such as scraping glue and grinding will be carried out to further improve the flatness and finish of the ceramic.   Through our unremitting efforts, the quality and process of ceramic composite wear-resistant pipes have reached new heights, winning the trust and praise of many customers at home and abroad.